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Quark down - Wikipedia

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id="toc-Adroni_che_contengono_quark_down-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Note" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Note"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Note</span> </div> </a> <ul id="toc-Note-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bibliografia" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Bibliografia"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Bibliografia</span> </div> </a> <ul id="toc-Bibliografia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Voci_correlate" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Voci_correlate"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Voci correlate</span> </div> </a> <ul id="toc-Voci_correlate-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Collegamenti_esterni" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Collegamenti_esterni"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Collegamenti esterni</span> </div> </a> <ul id="toc-Collegamenti_esterni-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Indice" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Mostra/Nascondi l&#039;indice" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Mostra/Nascondi l&#039;indice</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Quark down</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Vai a una voce in un&#039;altra lingua. Disponibile in 53 lingue" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-53" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">53 lingue</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Afkwark" title="Afkwark - afrikaans" lang="af" hreflang="af" data-title="Afkwark" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%83%D9%88%D8%A7%D8%B1%D9%83_%D8%B3%D9%81%D9%84%D9%8A" title="كوارك سفلي - arabo" lang="ar" hreflang="ar" data-title="كوارك سفلي" data-language-autonym="العربية" data-language-local-name="arabo" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Quark_embaxo" title="Quark embaxo - asturiano" lang="ast" hreflang="ast" data-title="Quark embaxo" data-language-autonym="Asturianu" data-language-local-name="asturiano" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/D-%D0%BA%D0%B2%D0%B0%D1%80%D0%BA" title="D-кварк - bielorusso" lang="be" hreflang="be" data-title="D-кварк" data-language-autonym="Беларуская" data-language-local-name="bielorusso" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%94%D0%BE%D0%BB%D0%B5%D0%BD_%D0%BA%D0%B2%D0%B0%D1%80%D0%BA" title="Долен кварк - bulgaro" lang="bg" hreflang="bg" data-title="Долен кварк" data-language-autonym="Български" data-language-local-name="bulgaro" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%A1%E0%A6%BE%E0%A6%89%E0%A6%A8_%E0%A6%95%E0%A7%8B%E0%A6%AF%E0%A6%BC%E0%A6%BE%E0%A6%B0%E0%A7%8D%E0%A6%95" title="ডাউন কোয়ার্ক - bengalese" lang="bn" hreflang="bn" data-title="ডাউন কোয়ার্ক" data-language-autonym="বাংলা" data-language-local-name="bengalese" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Quark_d" title="Quark d - catalano" lang="ca" hreflang="ca" data-title="Quark d" data-language-autonym="Català" data-language-local-name="catalano" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Kvark_d" title="Kvark d - ceco" lang="cs" hreflang="cs" data-title="Kvark d" data-language-autonym="Čeština" data-language-local-name="ceco" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Down-kvark" title="Down-kvark - danese" lang="da" hreflang="da" data-title="Down-kvark" data-language-autonym="Dansk" data-language-local-name="danese" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de badge-Q70894304 mw-list-item" title=""><a href="https://de.wikipedia.org/wiki/Down-Quark" title="Down-Quark - tedesco" lang="de" hreflang="de" data-title="Down-Quark" data-language-autonym="Deutsch" data-language-local-name="tedesco" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Down_quark" title="Down quark - inglese" lang="en" hreflang="en" data-title="Down quark" data-language-autonym="English" data-language-local-name="inglese" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/D-kvarko" title="D-kvarko - esperanto" lang="eo" hreflang="eo" data-title="D-kvarko" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Cuark_abajo" title="Cuark abajo - spagnolo" lang="es" hreflang="es" data-title="Cuark abajo" data-language-autonym="Español" data-language-local-name="spagnolo" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/D-kvark" title="D-kvark - estone" lang="et" hreflang="et" data-title="D-kvark" data-language-autonym="Eesti" data-language-local-name="estone" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Beherantz_quark" title="Beherantz quark - basco" lang="eu" hreflang="eu" data-title="Beherantz quark" data-language-autonym="Euskara" data-language-local-name="basco" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%DA%A9%D9%88%D8%A7%D8%B1%DA%A9_%D9%BE%D8%A7%DB%8C%DB%8C%D9%86" title="کوارک پایین - persiano" lang="fa" hreflang="fa" data-title="کوارک پایین" data-language-autonym="فارسی" data-language-local-name="persiano" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Alaskvarkki" title="Alaskvarkki - finlandese" lang="fi" hreflang="fi" data-title="Alaskvarkki" data-language-autonym="Suomi" data-language-local-name="finlandese" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Quark_down" title="Quark down - francese" lang="fr" hreflang="fr" data-title="Quark down" data-language-autonym="Français" data-language-local-name="francese" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A7%D7%95%D7%95%D7%90%D7%A8%D7%A7_%D7%9C%D7%9E%D7%98%D7%94" title="קווארק למטה - ebraico" lang="he" hreflang="he" data-title="קווארק למטה" data-language-autonym="עברית" data-language-local-name="ebraico" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%A1%E0%A4%BE%E0%A4%89%E0%A4%A8_%E0%A4%95%E0%A5%8D%E0%A4%B5%E0%A4%BE%E0%A4%B0%E0%A5%8D%E0%A4%95" title="डाउन क्वार्क - hindi" lang="hi" hreflang="hi" data-title="डाउन क्वार्क" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Donji_kvark" title="Donji kvark - croato" lang="hr" hreflang="hr" data-title="Donji kvark" data-language-autonym="Hrvatski" data-language-local-name="croato" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Down_kvark" title="Down kvark - ungherese" lang="hu" hreflang="hu" data-title="Down kvark" data-language-autonym="Magyar" data-language-local-name="ungherese" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/D-%D6%84%D5%BE%D5%A1%D6%80%D5%AF" title="D-քվարկ - armeno" lang="hy" hreflang="hy" data-title="D-քվարկ" data-language-autonym="Հայերեն" data-language-local-name="armeno" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Kuark_down" title="Kuark down - indonesiano" lang="id" hreflang="id" data-title="Kuark down" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesiano" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%80%E3%82%A6%E3%83%B3%E3%82%AF%E3%82%A9%E3%83%BC%E3%82%AF" title="ダウンクォーク - giapponese" lang="ja" hreflang="ja" data-title="ダウンクォーク" data-language-autonym="日本語" data-language-local-name="giapponese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/D-%E1%83%99%E1%83%95%E1%83%90%E1%83%A0%E1%83%99%E1%83%98" title="D-კვარკი - georgiano" lang="ka" hreflang="ka" data-title="D-კვარკი" data-language-autonym="ქართული" data-language-local-name="georgiano" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%95%84%EB%9E%98_%EC%BF%BC%ED%81%AC" title="아래 쿼크 - coreano" lang="ko" hreflang="ko" data-title="아래 쿼크" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Quarcum_deorsum" title="Quarcum deorsum - latino" lang="la" hreflang="la" data-title="Quarcum deorsum" data-language-autonym="Latina" data-language-local-name="latino" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Krintantysis_kvarkas" title="Krintantysis kvarkas - lituano" lang="lt" hreflang="lt" data-title="Krintantysis kvarkas" data-language-autonym="Lietuvių" data-language-local-name="lituano" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/D_kvarks" title="D kvarks - lettone" lang="lv" hreflang="lv" data-title="D kvarks" data-language-autonym="Latviešu" data-language-local-name="lettone" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%94%D0%BE%D0%BB%D0%B5%D0%BD_%D0%BA%D0%B2%D0%B0%D1%80%D0%BA" title="Долен кварк - macedone" lang="mk" hreflang="mk" data-title="Долен кварк" data-language-autonym="Македонски" data-language-local-name="macedone" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Kuark_turun" title="Kuark turun - malese" lang="ms" hreflang="ms" data-title="Kuark turun" data-language-autonym="Bahasa Melayu" data-language-local-name="malese" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Downquark" title="Downquark - olandese" lang="nl" hreflang="nl" data-title="Downquark" data-language-autonym="Nederlands" data-language-local-name="olandese" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Nedkvark" title="Nedkvark - norvegese bokmål" lang="nb" hreflang="nb" data-title="Nedkvark" data-language-autonym="Norsk bokmål" data-language-local-name="norvegese bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Quark_down" title="Quark down - occitano" lang="oc" hreflang="oc" data-title="Quark down" data-language-autonym="Occitan" data-language-local-name="occitano" class="interlanguage-link-target"><span>Occitan</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Kwark_dolny" title="Kwark dolny - polacco" lang="pl" hreflang="pl" data-title="Kwark dolny" data-language-autonym="Polski" data-language-local-name="polacco" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%DA%88%D8%A7%D8%A4%D9%86_%DA%A9%D9%88%D8%A7%D8%B1%DA%A9" title="ڈاؤن کوارک - Western Punjabi" lang="pnb" hreflang="pnb" data-title="ڈاؤن کوارک" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Quark_down" title="Quark down - portoghese" lang="pt" hreflang="pt" data-title="Quark down" data-language-autonym="Português" data-language-local-name="portoghese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/D-%D0%BA%D0%B2%D0%B0%D1%80%D0%BA" title="D-кварк - russo" lang="ru" hreflang="ru" data-title="D-кварк" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Donji_kvark" title="Donji kvark - serbo-croato" lang="sh" hreflang="sh" data-title="Donji kvark" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbo-croato" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Down_quark" title="Down quark - Simple English" lang="en-simple" hreflang="en-simple" data-title="Down quark" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Kvark_d" title="Kvark d - slovacco" lang="sk" hreflang="sk" data-title="Kvark d" data-language-autonym="Slovenčina" data-language-local-name="slovacco" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Kvark_d" title="Kvark d - sloveno" lang="sl" hreflang="sl" data-title="Kvark d" data-language-autonym="Slovenščina" data-language-local-name="sloveno" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/Donji_kvark" title="Donji kvark - serbo" lang="sr" hreflang="sr" data-title="Donji kvark" data-language-autonym="Српски / srpski" data-language-local-name="serbo" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Babang_quark" title="Babang quark - tagalog" lang="tl" hreflang="tl" data-title="Babang quark" data-language-autonym="Tagalog" data-language-local-name="tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/A%C5%9Fa%C4%9F%C4%B1_kuark" title="Aşağı kuark - turco" lang="tr" hreflang="tr" data-title="Aşağı kuark" data-language-autonym="Türkçe" data-language-local-name="turco" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/D-kvark" title="D-kvark - tataro" lang="tt" hreflang="tt" data-title="D-kvark" data-language-autonym="Татарча / tatarça" data-language-local-name="tataro" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/D-%D0%BA%D0%B2%D0%B0%D1%80%D0%BA" title="D-кварк - ucraino" lang="uk" hreflang="uk" data-title="D-кварк" data-language-autonym="Українська" data-language-local-name="ucraino" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Quark_xu%E1%BB%91ng" title="Quark xuống - vietnamita" lang="vi" hreflang="vi" data-title="Quark xuống" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Ubos_nga_quark" title="Ubos nga quark - waray" lang="war" hreflang="war" data-title="Ubos nga quark" data-language-autonym="Winaray" data-language-local-name="waray" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E4%B8%8B%E5%A4%B8%E5%85%8B" title="下夸克 - wu" lang="wuu" hreflang="wuu" data-title="下夸克" data-language-autonym="吴语" data-language-local-name="wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a 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</div> <div id="siteSub" class="noprint">Da Wikipedia, l&#039;enciclopedia libera.</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="it" dir="ltr"><table class="infobox sinottico" summary="Tabella sinottica che riassume i principali dati del soggetto"><tbody><tr class="sinottico_testata"><th colspan="2" style="background:#bfdfff">Quark down</th></tr><tr><th>Classificazione</th><td><a href="/wiki/Particella_elementare" title="Particella elementare">Particella elementare</a> </td></tr><tr><th>Famiglia</th><td><a href="/wiki/Fermioni" class="mw-redirect" title="Fermioni">Fermioni</a> </td></tr><tr><th>Gruppo</th><td><a href="/wiki/Quark_(particella)" title="Quark (particella)">Quark</a> </td></tr><tr><th><a href="/wiki/Generazione_(fisica)" title="Generazione (fisica)">Generazione</a></th><td>Prima </td></tr><tr><th><a href="/wiki/Interazioni_fondamentali" title="Interazioni fondamentali">Interazioni</a></th><td><a href="/wiki/Forza_elettromagnetica" class="mw-redirect" title="Forza elettromagnetica">Elettromagnetica</a>, <a href="/wiki/Interazione_forte" title="Interazione forte">forte</a>, <a href="/wiki/Interazione_debole" title="Interazione debole">debole</a>, <a href="/wiki/Interazione_gravitazionale" title="Interazione gravitazionale">gravitazionale</a> </td></tr><tr><th>Simbolo</th><td><span style="white-space:nowrap">d</span> </td></tr><tr><th><a href="/wiki/Antiparticella" title="Antiparticella">Antiparticella</a></th><td>Antiquark down (<span style="white-space:nowrap"><span style="text-decoration:overline;">d</span></span>) </td></tr><tr><th>Teorizzata</th><td><a href="/wiki/Murray_Gell-Mann" title="Murray Gell-Mann">Murray Gell-Mann</a> (1964)<br /><a href="/wiki/George_Zweig" title="George Zweig">George Zweig</a> (1964) </td></tr><tr><th>Scoperta</th><td><a href="/wiki/SLAC" title="SLAC">SLAC</a> (1968) </td></tr><tr class="sinottico_divisione"><th colspan="2" style="background:#bfdfff">Proprietà fisiche</th></tr><tr><th><a href="/wiki/Massa_a_riposo" title="Massa a riposo">Massa</a></th><td>3,5–6,0 <a href="/wiki/Elettronvolt" title="Elettronvolt">MeV/c<sup>2</sup></a><sup id="cite_ref-PDG2009_1-0" class="reference"><a href="#cite_note-PDG2009-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup> </td></tr><tr><th>Prodotti di decadimento</th><td>Stabile oppure <a href="/wiki/Quark_up" title="Quark up">quark up</a> + <a href="/wiki/Elettrone" title="Elettrone">elettrone</a> + <a href="/wiki/Antineutrino_elettronico" class="mw-redirect" title="Antineutrino elettronico">antineutrino elettronico</a> </td></tr><tr><th><a href="/wiki/Carica_elementare" title="Carica elementare">Carica&#160;elettrica</a></th><td>-⅓ <a href="/wiki/Carica_elementare" title="Carica elementare">e</a> </td></tr><tr><th><a href="/wiki/Carica_di_colore" title="Carica di colore">Carica di colore</a></th><td>Sì </td></tr><tr><th><a href="/wiki/Spin" title="Spin">Spin</a></th><td>½ </td></tr><tr><th><a href="/wiki/Numero_barionico" title="Numero barionico">Numero barionico</a></th><td>+⅓ </td></tr></tbody></table> <p>Il <b>quark down</b> o <b>quark giù</b> (solitamente abbreviato in <i>quark d</i>) è un <a href="/wiki/Quark_(particella)" title="Quark (particella)">quark</a> di prima <a href="/wiki/Generazione_(fisica)" title="Generazione (fisica)">generazione</a> con una <a href="/wiki/Carica_elettrica" title="Carica elettrica">carica elettrica</a> negativa di -<sup>1</sup>⁄<sub>3</sub> <a href="/wiki/Carica_elementare" title="Carica elementare">e</a>. </p><p>Con una <a href="/wiki/Massa_(fisica)" title="Massa (fisica)">massa</a> probabilmente compresa tra i 3,5 e i 6 <a href="/wiki/MeV" class="mw-redirect" title="MeV">MeV</a>/<a href="/wiki/Velocit%C3%A0_della_luce" title="Velocità della luce">c</a><sup>2</sup>, è il quark più leggero dopo il <a href="/wiki/Quark_up" title="Quark up">quark up</a>.<sup id="cite_ref-PDG2009_1-1" class="reference"><a href="#cite_note-PDG2009-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup>. In accordo al <a href="/wiki/Modello_standard" title="Modello standard">modello standard</a> della <a href="/wiki/Fisica_delle_particelle" title="Fisica delle particelle">fisica delle particelle</a>, questi due quark stabili sono i costituenti fondamentali dei <a href="/wiki/Nucleone" title="Nucleone">nucleoni</a>: il <a href="/wiki/Protone" title="Protone">protone</a> contiene un quark down e due quark up, mentre il <a href="/wiki/Neutrone" title="Neutrone">neutrone</a> contiene due quark down e un quark up. </p><p>È da notare che la maggior parte della massa nei nucleoni proviene dall'energia del <a href="/wiki/Gluone" title="Gluone">campo gluonico</a> che tiene insieme i quark, e non dalle masse dei quark stessi. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Storia">Storia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Quark_down&amp;veaction=edit&amp;section=1" title="Modifica la sezione Storia" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Quark_down&amp;action=edit&amp;section=1" title="Edit section&#039;s source code: Storia"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Nel <a href="/wiki/1963" title="1963">1963</a> <a href="/wiki/Murray_Gell-Mann" title="Murray Gell-Mann">Murray Gell-Mann</a> e <a href="/wiki/George_Zweig" title="George Zweig">George Zweig</a> ipotizzarono l'esistenza dei quark, in particolare dei primi tre (quark up, down e <a href="/wiki/Quark_strange" title="Quark strange">strange</a>), e la prima prova della loro esistenza fu ottenuta con un esperimento di <a href="/wiki/Scattering_anelastico_profondo" title="Scattering anelastico profondo">scattering anelastico profondo</a> effettuato allo <a href="/wiki/SLAC" title="SLAC">SLAC</a> nel <a href="/wiki/1967" title="1967">1967</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Adroni_che_contengono_quark_down">Adroni che contengono quark down</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Quark_down&amp;veaction=edit&amp;section=2" title="Modifica la sezione Adroni che contengono quark down" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Quark_down&amp;action=edit&amp;section=2" title="Edit section&#039;s source code: Adroni che contengono quark down"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Sono inclusi tra gli <a href="/wiki/Adrone" title="Adrone">adroni</a> che contengono quark down: </p> <ul><li>I <a href="/wiki/Pione" title="Pione">pioni</a> carichi (<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \pi ^{\pm }}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msup> <mi>&#x03C0;<!-- π --></mi> <mrow class="MJX-TeXAtom-ORD"> <mo>&#x00B1;<!-- ± --></mo> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \pi ^{\pm }}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/c0eae6b9545f75d2c6d412e908c97460b12a1eb0" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.845ex; height:2.676ex;" alt="{\displaystyle \pi ^{\pm }}"></span>): <a href="/wiki/Mesone" title="Mesone">mesoni</a> che contengono un quark up e un quark antidown, o viceversa.</li> <li>Il pione neutro (<span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \pi ^{0}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msup> <mi>&#x03C0;<!-- π --></mi> <mrow class="MJX-TeXAtom-ORD"> <mn>0</mn> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \pi ^{0}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/0e5c69d6c2f4f402dbc665745b9a042083ca8977" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.388ex; height:2.676ex;" alt="{\displaystyle \pi ^{0}}"></span>): una combinazione lineare di up-antiup e down-antidown, come i mesoni <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \rho }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>&#x03C1;<!-- ρ --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \rho }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/1f7d439671d1289b6a816e6af7a304be40608d64" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:1.202ex; height:2.176ex;" alt="{\displaystyle \rho }"></span> e <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \omega }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>&#x03C9;<!-- ω --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \omega }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/48eff443f9de7a985bb94ca3bde20813ea737be8" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.446ex; height:1.676ex;" alt="{\displaystyle \omega }"></span>.</li> <li>I mesoni <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \eta }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>&#x03B7;<!-- η --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \eta }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/e4d701857cf5fbec133eebaf94deadf722537f64" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:1.169ex; height:2.176ex;" alt="{\displaystyle \eta }"></span> ed <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \eta '}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msup> <mi>&#x03B7;<!-- η --></mi> <mo>&#x2032;</mo> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \eta '}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/8847ba85d8b14cc9ab902c82da70c41b112593ea" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.838ex; width:1.858ex; height:3.009ex;" alt="{\displaystyle \eta &#039;}"></span>: combinazioni lineari di alcune coppie quark-<a href="/wiki/Antiquark" title="Antiquark">antiquark</a> inclusa la coppia down-antidown.</li> <li>Un gran numero di <a href="/wiki/Barione" title="Barione">barioni</a> identificati contengono uno o più quark down. Come i nucleoni, i barioni <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \Delta }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi mathvariant="normal">&#x0394;<!-- Δ --></mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \Delta }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/32769037c408874e1890f77554c65f39c523ebe2" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.936ex; height:2.176ex;" alt="{\displaystyle \Delta }"></span> sono composti solo da quark up e quark down: il <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \Delta ^{+}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msup> <mi mathvariant="normal">&#x0394;<!-- Δ --></mi> <mrow class="MJX-TeXAtom-ORD"> <mo>+</mo> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \Delta ^{+}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/73cd9ada08bdfc7bc5deb5c2e75c02c3d1ac84b3" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:3.447ex; height:2.509ex;" alt="{\displaystyle \Delta ^{+}}"></span> contiene un quark down, il <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \Delta ^{0}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msup> <mi mathvariant="normal">&#x0394;<!-- Δ --></mi> <mrow class="MJX-TeXAtom-ORD"> <mn>0</mn> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \Delta ^{0}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/7ce90c3c1e19db1a5117f100e0e243d3d1b995cc" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:2.99ex; height:2.676ex;" alt="{\displaystyle \Delta ^{0}}"></span> ne contiene due, e il <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \Delta ^{-}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msup> <mi mathvariant="normal">&#x0394;<!-- Δ --></mi> <mrow class="MJX-TeXAtom-ORD"> <mo>&#x2212;<!-- − --></mo> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \Delta ^{-}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/ae64fc5506526225a5285d997b0a295d0931c278" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:3.447ex; height:2.509ex;" alt="{\displaystyle \Delta ^{-}}"></span> ne contiene tre.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Note">Note</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Quark_down&amp;veaction=edit&amp;section=3" title="Modifica la sezione Note" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Quark_down&amp;action=edit&amp;section=3" title="Edit section&#039;s source code: Note"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-PDG2009-1"><span class="mw-cite-backlink"><b>^</b> <sup><i><a href="#cite_ref-PDG2009_1-0">a</a></i></sup> <sup><i><a href="#cite_ref-PDG2009_1-1">b</a></i></sup></span> <span class="reference-text"><cite class="citation web" style="font-style:normal"> C. Amsler <i>et al.</i> (<a href="/wiki/Particle_Data_Group" title="Particle Data Group">Particle Data Group</a>), <a rel="nofollow" class="external text" href="https://web.archive.org/web/20200506063513/http://pdglive.lbl.gov/Rsummary.brl?nodein=Q001"><span style="font-style:italic;">PDGLive Particle Summary</span></a>, su <span style="font-style:italic;">pdglive.lbl.gov</span>, <a href="/wiki/Particle_Data_Group" title="Particle Data Group">Particle Data Group</a>, 2009. <small>URL consultato il 23 luglio 2009</small> <small>(archiviato dall'<abbr title="http&#58;//pdglive.lbl.gov/Rsummary.brl?nodein=Q001">url originale</abbr> il 6 maggio 2020)</small>.</cite></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Bibliografia">Bibliografia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Quark_down&amp;veaction=edit&amp;section=4" title="Modifica la sezione Bibliografia" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Quark_down&amp;action=edit&amp;section=4" title="Edit section&#039;s source code: Bibliografia"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><cite class="citation pubblicazione" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) C. Amsler <i>et al.</i>, <a rel="nofollow" class="external text" href="http://pdg.lbl.gov/2008/tables/rpp2008-sum-quarks.pdf"><span style="font-style:italic;">Review of Particle Physics: Quarks</span></a> (<span style="font-weight: bolder; font-size:80%"><abbr title="documento in formato PDF">PDF</abbr></span>), in <span style="font-style:italic;">Physics Letters</span>, B667, n.&#160;1, <a href="/wiki/Particle_Data_Group" title="Particle Data Group">Particle Data Group</a>, 2008, pp.&#160;1–1340.</cite></li> <li><cite class="citation libro" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) Richard Feynman, <a rel="nofollow" class="external text" href="https://archive.org/details/elementarypartic0000feyn"><span style="font-style:italic;">The reason for antiparticles</span></a>, in <span style="font-style:italic;">The 1986 Dirac memorial lectures</span>, Cambridge University Press, 1987, <a href="/wiki/ISBN" title="ISBN">ISBN</a>&#160;<a href="/wiki/Speciale:RicercaISBN/0-521-34000-4" title="Speciale:RicercaISBN/0-521-34000-4">0-521-34000-4</a>.</cite></li> <li><cite class="citation libro" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) Richard Feynman, <span style="font-style:italic;">Quantum Electrodynamics</span>, Perseus Publishing, 1998, <a href="/wiki/ISBN" title="ISBN">ISBN</a>&#160;<a href="/wiki/Speciale:RicercaISBN/0-201-36075-6" title="Speciale:RicercaISBN/0-201-36075-6">0-201-36075-6</a>.</cite></li> <li><cite class="citation libro" style="font-style:normal"> Richard Feynman, <span style="font-style:italic;">QED: La strana teoria della luce e della materia</span>, Adelphi, <a href="/wiki/ISBN" title="ISBN">ISBN</a>&#160;<a href="/wiki/Speciale:RicercaISBN/88-459-0719-8" title="Speciale:RicercaISBN/88-459-0719-8">88-459-0719-8</a>.</cite></li> <li><cite class="citation libro" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) Steven Weinberg, <span style="font-style:italic;">The quantum theory of fields, Volume 1: Foundations</span>, Cambridge University Press, 1995, <a href="/wiki/ISBN" title="ISBN">ISBN</a>&#160;<a href="/wiki/Speciale:RicercaISBN/0-521-55001-7" title="Speciale:RicercaISBN/0-521-55001-7">0-521-55001-7</a>.</cite></li> <li><cite class="citation libro" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) Claude Cohen-Tannoudji, Jacques Dupont-Roc e Gilbert Grynberg, <span style="font-style:italic;">Photons and Atoms: Introduction to Quantum Electrodynamics</span>, John Wiley &amp; Sons, 1997, <a href="/wiki/ISBN" title="ISBN">ISBN</a>&#160;<a href="/wiki/Speciale:RicercaISBN/0-471-18433-0" title="Speciale:RicercaISBN/0-471-18433-0">0-471-18433-0</a>.</cite></li> <li><cite class="citation libro" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) J. M. Jauch e F. Rohrlich, <span style="font-style:italic;">The Theory of Photons and Electrons</span>, Springer-Verlag, 1980, <a href="/wiki/ISBN" title="ISBN">ISBN</a>&#160;<a href="/wiki/Speciale:RicercaISBN/0-201-36075-6" title="Speciale:RicercaISBN/0-201-36075-6">0-201-36075-6</a>.</cite></li></ul> <div class="mw-heading mw-heading2"><h2 id="Voci_correlate">Voci correlate</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Quark_down&amp;veaction=edit&amp;section=5" title="Modifica la sezione Voci correlate" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Quark_down&amp;action=edit&amp;section=5" title="Edit section&#039;s source code: Voci correlate"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Antiquark" title="Antiquark">Antiquark</a></li> <li><a href="/wiki/Quark_(particella)" title="Quark (particella)">Quark (particella)</a></li> <li><a href="/wiki/Isospin" title="Isospin">Isospin</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Collegamenti_esterni">Collegamenti esterni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Quark_down&amp;veaction=edit&amp;section=6" title="Modifica la sezione Collegamenti esterni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Quark_down&amp;action=edit&amp;section=6" title="Edit section&#039;s source code: Collegamenti esterni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li class="mw-empty-elt"></li> <li><cite id="CITEREFBritannica.com" class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="https://www.britannica.com/science/down-quark"><span style="font-style:italic;">down quark</span></a>, su <span style="font-style:italic;"><a href="/wiki/Enciclopedia_Britannica" title="Enciclopedia Britannica">Enciclopedia Britannica</a></span>, Encyclopædia Britannica, Inc.</cite> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q6745#P1417" title="Modifica su Wikidata"><img alt="Modifica su Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/15px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></li></ul> <style data-mw-deduplicate="TemplateStyles:r141815314">.mw-parser-output .navbox{border:1px solid #aaa;clear:both;margin:auto;padding:2px;width:100%}.mw-parser-output .navbox th{padding-left:1em;padding-right:1em;text-align:center}.mw-parser-output .navbox>tbody>tr:first-child>th{background:#ccf;font-size:90%;width:100%;color:var(--color-base,black)}.mw-parser-output .navbox_navbar{float:left;margin:0;padding:0 10px 0 0;text-align:left;width:6em}.mw-parser-output .navbox_title{font-size:110%}.mw-parser-output .navbox_abovebelow{background:#ddf;font-size:90%;font-weight:normal}.mw-parser-output .navbox_group{background:#ddf;font-size:90%;padding:0 10px;white-space:nowrap}.mw-parser-output .navbox_list{font-size:90%;width:100%}.mw-parser-output .navbox_list a{white-space:nowrap}html:not(.vector-feature-night-mode-enabled) .mw-parser-output .navbox_odd{background:#fdfdfd;color:var(--color-base,black)}html:not(.vector-feature-night-mode-enabled) .mw-parser-output .navbox_even{background:#f7f7f7;color:var(--color-base,black)}.mw-parser-output .navbox a.mw-selflink{color:var(--color-base,black)}.mw-parser-output .navbox_center{text-align:center}.mw-parser-output .navbox .navbox_image{padding-left:7px;vertical-align:middle;width:0}.mw-parser-output .navbox+.navbox{margin-top:-1px}.mw-parser-output .navbox .mw-collapsible-toggle{font-weight:normal;text-align:right;width:7em}body.skin--responsive .mw-parser-output .navbox_image img{max-width:none!important}.mw-parser-output .subnavbox{margin:-3px;width:100%}.mw-parser-output .subnavbox_group{background:#e6e6ff;padding:0 10px}@media screen{html.skin-theme-clientpref-night .mw-parser-output .navbox>tbody>tr:first-child>th{background:var(--background-color-interactive)!important}html.skin-theme-clientpref-night .mw-parser-output .navbox th{color:var(--color-base)!important}html.skin-theme-clientpref-night .mw-parser-output .navbox_abovebelow,html.skin-theme-clientpref-night .mw-parser-output .navbox_group{background:var(--background-color-interactive-subtle)!important}html.skin-theme-clientpref-night .mw-parser-output .subnavbox_group{background:var(--background-color-neutral-subtle)!important}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbox>tbody>tr:first-child>th{background:var(--background-color-interactive)!important}html.skin-theme-clientpref-os .mw-parser-output .navbox th{color:var(--color-base)!important}html.skin-theme-clientpref-os .mw-parser-output .navbox_abovebelow,html.skin-theme-clientpref-os .mw-parser-output .navbox_group{background:var(--background-color-interactive-subtle)!important}html.skin-theme-clientpref-os .mw-parser-output .subnavbox_group{background:var(--background-color-neutral-subtle)!important}}</style><table class="navbox mw-collapsible mw-collapsed noprint metadata" id="navbox-Particelle"><tbody><tr><th colspan="3"><div class="navbox_navbar"><div class="noprint plainlinks" style="background-color:transparent; padding:0; font-size:xx-small; color:var(--color-base, #000000); white-space:nowrap;"><a href="/wiki/Template:Particelle" title="Template:Particelle"><span title="Vai alla pagina del template">V</span></a>&#160;·&#160;<a href="/wiki/Discussioni_template:Particelle" title="Discussioni template:Particelle"><span title="Discuti del template">D</span></a>&#160;·&#160;<a class="external text" href="https://it.wikipedia.org/w/index.php?title=Template:Particelle&amp;action=edit"><span title="Modifica il template. Usa l&#39;anteprima prima di salvare">M</span></a></div></div><span class="navbox_title"><a href="/wiki/Particella_subatomica" title="Particella subatomica">Particelle in fisica</a></span></th></tr><tr><th colspan="1" class="navbox_group" style="width:5em;font-weight:normal; width:10%"><b><a href="/wiki/Particella_elementare" title="Particella elementare">Elementari</a></b></th><td colspan="1" class="navbox_list navbox_odd" style="background:transparent"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="width:5em;font-weight:normal; width:9%;background:#e6e6ff"><b><a href="/wiki/Fermione" title="Fermione">Fermioni</a></b></th><td colspan="1"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="width:5em;font-weight:normal; width:12%;background:#e6e6ff"><a href="/wiki/Quark_(particella)" title="Quark (particella)">Quark</a></th><td colspan="1"><a href="/wiki/Quark_up" title="Quark up">Up</a><b>&#160;·</b> <a class="mw-selflink selflink">Down</a><b>&#160;·</b> <a href="/wiki/Quark_charm" title="Quark charm">Charm</a><b>&#160;·</b> <a href="/wiki/Quark_strange" title="Quark strange">Strange</a><b>&#160;·</b> <a href="/wiki/Quark_top" title="Quark top">Top</a><b>&#160;·</b> <a href="/wiki/Quark_bottom" title="Quark bottom">Bottom</a></td></tr><tr><th class="subnavbox_group" style="width:5em;font-weight:normal; width:12%;background:#e6e6ff"><a href="/wiki/Leptone" title="Leptone">Leptoni</a></th><td colspan="1"><a href="/wiki/Elettrone" title="Elettrone">Elettrone</a><b>&#160;·</b> <a href="/wiki/Positrone" title="Positrone">Positrone</a><b>&#160;·</b> <a href="/wiki/Muone" title="Muone">Muone</a><b>&#160;·</b> <a href="/wiki/Antimuone" class="mw-redirect" title="Antimuone">Antimuone</a><b>&#160;·</b> <a href="/wiki/Tauone" title="Tauone">Tauone</a><b>&#160;·</b> <a href="/wiki/Antitauone" class="mw-redirect" title="Antitauone">Antitauone</a><b>&#160;·</b> <a href="/wiki/Neutrino_elettronico" title="Neutrino elettronico">Neutrino elettronico</a><b>&#160;·</b> <a href="/wiki/Antineutrino_elettronico" class="mw-redirect" title="Antineutrino elettronico">Antineutrino elettronico</a><b>&#160;·</b> <a href="/wiki/Neutrino_muonico" title="Neutrino muonico">Neutrino muonico</a><b>&#160;·</b> <a href="/wiki/Antineutrino_muonico" class="mw-redirect" title="Antineutrino muonico">Antineutrino muonico</a><b>&#160;·</b> <a href="/wiki/Neutrino_tauonico" title="Neutrino tauonico">Neutrino tauonico</a><b>&#160;·</b> <a href="/wiki/Antineutrino_tauonico" class="mw-redirect" title="Antineutrino tauonico">Antineutrino tauonico</a></td></tr></tbody></table></td></tr><tr><th class="subnavbox_group" style="width:5em;font-weight:normal; width:9%;background:#e6e6ff"><b><a href="/wiki/Bosone_(fisica)" title="Bosone (fisica)">Bosoni</a></b></th><td colspan="1"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="width:5em;font-weight:normal;width:12%;background:#e6e6ff"><a href="/wiki/Bosone_di_gauge" title="Bosone di gauge">Gauge</a></th><td colspan="1"><a href="/wiki/Fotone" title="Fotone">Fotone</a><b>&#160;·</b> <a href="/wiki/Gluone" title="Gluone">Gluone</a><b>&#160;·</b> <a href="/wiki/Bosoni_W_e_Z" title="Bosoni W e Z">Bosoni W e Z</a></td></tr><tr><th class="subnavbox_group" style="width:5em;font-weight:normal;width:12%;background:#e6e6ff"><a href="/wiki/Bosone_scalare" title="Bosone scalare">Scalari</a></th><td colspan="1"><a href="/wiki/Bosone_di_Higgs" title="Bosone di Higgs">Bosone di Higgs</a></td></tr></tbody></table></td></tr><tr><th class="subnavbox_group" style="width:5em;font-weight:normal; width:9%;background:#e6e6ff"><a href="/wiki/Lista_delle_particelle" class="mw-redirect" title="Lista delle particelle">Ipotetiche</a></th><td colspan="1"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="font-weight:normal;width:12%;background:#e6e6ff"><a href="/wiki/Sparticella" title="Sparticella">Sparticelle</a></th><td colspan="1"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="font-weight:normal;width:8%;background:#e6e6ff"><a href="/wiki/Gaugino" title="Gaugino">Gaugini</a></th><td colspan="1"><a href="/wiki/Gluino" class="mw-redirect" title="Gluino">Gluino</a><b>&#160;·</b> <a href="/wiki/Gravitino" class="mw-redirect" title="Gravitino">Gravitino</a><b>&#160;·</b> <a href="/wiki/Fotino" class="mw-redirect" title="Fotino">Fotino</a></td></tr><tr><th class="subnavbox_group" style="font-weight:normal;width:8%;background:#e6e6ff">Altre</th><td colspan="1"><a href="/wiki/Axino" title="Axino">Axino</a><b>&#160;·</b> <a href="/wiki/Chargino" title="Chargino">Chargino</a><b>&#160;·</b> <a href="/wiki/Higgsino" class="mw-redirect" title="Higgsino">Higgsino</a><b>&#160;·</b> <a href="/wiki/Neutralino" title="Neutralino">Neutralino</a><b>&#160;·</b> <a href="/wiki/Sfermione" title="Sfermione">Sfermione</a><b>&#160;·</b> <a href="/wiki/Bosino_(particella)" title="Bosino (particella)">Bosino</a></td></tr></tbody></table></td></tr><tr><th class="subnavbox_group" style="font-weight:normal;width:12%;background:#e6e6ff">Altre</th><td colspan="1"><a href="/wiki/Assione" title="Assione">Assione</a><b>&#160;·</b> <a href="/wiki/Dilatone" title="Dilatone">Dilatone</a><b>&#160;·</b> <a href="/wiki/Gravitone" title="Gravitone">Gravitone</a><b>&#160;·</b> <a href="/wiki/Monopolo_magnetico" title="Monopolo magnetico">Monopolo magnetico</a><b>&#160;·</b> <a href="/wiki/Majorone" title="Majorone">Majorone</a><b>&#160;·</b> <a href="/wiki/Tachione" title="Tachione">Tachione</a><b>&#160;·</b> <a href="/wiki/Bosoni_X_e_Y" title="Bosoni X e Y">Bosoni X e Y</a><b>&#160;·</b> <a href="/wiki/Bosoni_W%27_e_Z%27" title="Bosoni W&#39; e Z&#39;">bosoni W' e Z'</a><b>&#160;·</b> <a href="/wiki/Neutrino_sterile" title="Neutrino sterile">Neutrino sterile</a><b>&#160;·</b> <a href="/wiki/Preone_(fisica)" title="Preone (fisica)">Preone</a><b>&#160;·</b> <a href="/wiki/Fermione_di_Majorana" title="Fermione di Majorana">Fermione di Majorana</a></td></tr></tbody></table></td></tr><tr><th class="subnavbox_group" style="width:5em;font-weight:normal; width:9%;background:#e6e6ff"><b>Altre</b></th><td colspan="1"><a href="/wiki/Ghost_di_Faddeev-Popov" title="Ghost di Faddeev-Popov">Ghost di Faddeev-Popov</a></td></tr></tbody></table></td><td rowspan="3" class="navbox_image"><span typeof="mw:File"><a href="/wiki/File:Modello_Standard_delle_Particelle_Elementari.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/40/Modello_Standard_delle_Particelle_Elementari.svg/400px-Modello_Standard_delle_Particelle_Elementari.svg.png" decoding="async" width="400" height="383" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/40/Modello_Standard_delle_Particelle_Elementari.svg/600px-Modello_Standard_delle_Particelle_Elementari.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/40/Modello_Standard_delle_Particelle_Elementari.svg/800px-Modello_Standard_delle_Particelle_Elementari.svg.png 2x" data-file-width="1390" data-file-height="1330" /></a></span></td></tr><tr><th colspan="1" class="navbox_group" style="width:5em;font-weight:normal; width:10%"><b><a href="/wiki/Stato_legato" class="mw-redirect" title="Stato legato">Composte</a></b></th><td colspan="1" class="navbox_list navbox_even" style="background:transparent"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="width:5em;font-weight:normal; width:9%;background:#e6e6ff"><b><a href="/wiki/Adrone" title="Adrone">Adroni</a></b></th><td colspan="1"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="width:5em;font-weight:normal; width:12%;background:#e6e6ff"><a href="/wiki/Barione" title="Barione">Barioni</a>/ <a href="/wiki/Iperone_(fisica)" title="Iperone (fisica)">iperoni</a></th><td colspan="1"><a href="/wiki/Nucleone" title="Nucleone">Nucleone</a> (<a href="/wiki/Protone" title="Protone">Protone</a><b>&#160;·</b> <a href="/wiki/Neutrone" title="Neutrone">Neutrone</a>)<b>&#160;·</b> <a href="/wiki/Barione_delta" title="Barione delta">Barione delta</a><b>&#160;·</b> <a href="/wiki/Barione_lambda" title="Barione lambda">Barione lambda</a><b>&#160;·</b> <a href="/wiki/Barione_sigma" title="Barione sigma">Barione sigma</a><b>&#160;·</b> <a href="/wiki/Barione_Xi" title="Barione Xi">Barione Xi</a><b>&#160;·</b> <a href="/wiki/Barione_omega" title="Barione omega">Barione omega</a></td></tr><tr><th class="subnavbox_group" style="width:5em;font-weight:normal; width:12%;background:#e6e6ff"><a href="/wiki/Mesone" title="Mesone">Mesoni</a>/ <a href="/wiki/Quarkonio" title="Quarkonio">quarkoni</a></th><td colspan="1"><a href="/wiki/Pione" title="Pione">Pione</a><b>&#160;·</b> <a href="/wiki/Mesone_rho" title="Mesone rho">Mesone rho</a><b>&#160;·</b> <a href="/wiki/Mesone_eta" title="Mesone eta">Mesoni eta e eta primo</a><b>&#160;·</b> <a href="/wiki/Mesone_phi" title="Mesone phi">Mesone phi</a><b>&#160;·</b> <a href="/wiki/Mesone_omega" title="Mesone omega">Mesone omega</a><b>&#160;·</b> <a href="/wiki/Mesone_J/Psi" title="Mesone J/Psi">Mesone J/Psi</a><b>&#160;·</b> <a href="/wiki/Mesone_upsilon" title="Mesone upsilon">Mesone upsilon</a><b>&#160;·</b> <a href="/wiki/Kaone" title="Kaone">Kaone</a><b>&#160;·</b> <a href="/wiki/Mesone_B" title="Mesone B">Mesone B</a><b>&#160;·</b> <a href="/wiki/Mesone_D" title="Mesone D">Mesone D</a></td></tr><tr><th class="subnavbox_group" style="width:5em;font-weight:normal; width:12%;background:#e6e6ff"><a href="/wiki/Adrone_esotico" title="Adrone esotico">Adroni esotici</a></th><td colspan="1"><a href="/wiki/Tetraquark" title="Tetraquark">Tetraquark</a><b>&#160;·</b> <a href="/wiki/Pentaquark" title="Pentaquark">Pentaquark</a></td></tr></tbody></table></td></tr><tr><th class="subnavbox_group" style="width:5em;font-weight:normal; width:9%;background:#e6e6ff"><a href="/wiki/Categoria:Particelle_composte_ipotetiche" title="Categoria:Particelle composte ipotetiche">Ipotetiche</a></th><td colspan="1"><table class="subnavbox"><tbody><tr><th class="subnavbox_group" style="font-weight:normal; width:12%;background:#e6e6ff"><a href="/wiki/Barione_esotico" title="Barione esotico">Barioni esotici</a></th><td colspan="1"><a href="/wiki/Esaquark" title="Esaquark">Esaquark</a></td></tr><tr><th class="subnavbox_group" style="font-weight:normal; width:12%;background:#e6e6ff"><a href="/wiki/Mesone_esotico" title="Mesone esotico">Mesoni esotici</a></th><td colspan="1"><a href="/wiki/Glueball" title="Glueball">Glueball</a> (<a href="/w/index.php?title=Odderone&amp;action=edit&amp;redlink=1" class="new" title="Odderone (la pagina non esiste)">Odderone</a>)<b>&#160;·</b> <a href="/wiki/Mesone_theta" title="Mesone theta">Mesone theta</a><b>&#160;·</b> <a href="/wiki/Mesone_T" title="Mesone T">Mesone T</a></td></tr><tr><th class="subnavbox_group" style="font-weight:normal; width:12%;background:#e6e6ff">Altre</th><td colspan="1"><a href="/wiki/Molecola_mesonica" title="Molecola mesonica">Molecola mesonica</a><b>&#160;·</b> <a href="/wiki/Pomerone" title="Pomerone">Pomerone</a></td></tr></tbody></table></td></tr><tr><th class="subnavbox_group" style="width:5em;font-weight:normal; width:9%;background:#e6e6ff"><b>Altre</b></th><td colspan="1"><a href="/wiki/Nucleo_atomico" title="Nucleo atomico">Nuclei atomici</a><b>&#160;·</b> <a href="/wiki/Atomo" title="Atomo">Atomi</a><b>&#160;·</b> <a href="/wiki/Atomo_esotico" title="Atomo esotico">Atomi esotici</a> (<a href="/wiki/Positronio" title="Positronio">Positronio</a><b>&#160;·</b> <a href="/wiki/Muonio_(fisica)" title="Muonio (fisica)">Muonio</a><b>&#160;·</b> <a href="/wiki/Tauonio" class="mw-redirect" title="Tauonio">Tauonio</a><b>&#160;·</b> <a href="/wiki/Pionio" title="Pionio">Pionio</a>)<b>&#160;·</b> <a href="/wiki/Atomolecola" title="Atomolecola">Atomolecole</a><b>&#160;·</b> <a href="/wiki/Molecola" title="Molecola">Molecole</a><b>&#160;·</b> <a href="/wiki/Superatomo" title="Superatomo">Superatomo</a></td></tr></tbody></table></td></tr><tr><th colspan="1" class="navbox_group" style="width:5em;font-weight:normal; width:10%"><b><a href="/wiki/Quasiparticella" title="Quasiparticella">Quasiparticelle</a></b></th><td colspan="1" class="navbox_list navbox_odd" style="background:transparent"><a href="/wiki/Droplettone" title="Droplettone">Droplettone</a><b>&#160;·</b> <a href="/wiki/Eccitone" title="Eccitone">Eccitone</a><b>&#160;·</b> <a href="/wiki/Fasone" title="Fasone">Fasone</a><b>&#160;·</b> <a href="/w/index.php?title=Frattone_(particella)&amp;action=edit&amp;redlink=1" class="new" title="Frattone (particella) (la pagina non esiste)">Frattone</a><b>&#160;·</b> <a href="/wiki/Fonone" title="Fonone">Fonone</a><b>&#160;·</b> <a href="/wiki/Lacuna_(fisica)" title="Lacuna (fisica)">Lacuna</a><b>&#160;·</b> <a href="/wiki/Levitone" title="Levitone">Levitone</a><b>&#160;·</b> <a href="/wiki/Magnone_(fisica)" title="Magnone (fisica)">Magnone</a><b>&#160;·</b> <a href="/w/index.php?title=Plasmarone&amp;action=edit&amp;redlink=1" class="new" title="Plasmarone (la pagina non esiste)">Plasmarone</a><b>&#160;·</b> <a href="/wiki/Plasmone" title="Plasmone">Plasmone</a><b>&#160;·</b> <a href="/wiki/Polaritone" title="Polaritone">Polaritone</a><b>&#160;·</b> <a href="/wiki/Polarone" title="Polarone">Polarone</a><b>&#160;·</b> <a href="/wiki/Qualunquone" title="Qualunquone">Qualunquone</a><b>&#160;·</b> <a href="/wiki/Rotone" title="Rotone">Rotone</a><b>&#160;·</b> <a href="/wiki/Skyrmione" title="Skyrmione">Skyrmione</a><b>&#160;·</b> <a href="/wiki/Skyrmione_magnetico" title="Skyrmione magnetico">Skyrmione magnetico</a><b>&#160;·</b> <a href="/wiki/Solitone" title="Solitone">Solitone</a><b>&#160;·</b> <a href="/wiki/Solitone_di_Davydov" title="Solitone di Davydov">Solitone di Davydov</a><b>&#160;·</b> <a href="/wiki/Spinone_(fisica)" title="Spinone (fisica)">Spinone</a><b>&#160;·</b> <a href="/wiki/Topolaritone" title="Topolaritone">Topolaritone</a></td></tr><tr><th colspan="3" class="navbox_abovebelow"><a href="/wiki/Cronologia_della_scoperta_delle_particelle" title="Cronologia della scoperta delle particelle">Cronologia della scoperta delle particelle</a></th></tr></tbody></table> <div class="noprint" style="width:100%; 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