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class="view-header"> <p>Actualités, opinions, annonces et articles à la une</p> </div> <div class="view-content clearfix"> <div class="views-row"> <div data-history-node-id="191265" id="preview-card" class="component-preview-cards box-pattern" style="background:url('/sites/default/files/styles/large/public/2024-11/202410-267_167.jpg?itok=9FkCAvwX') no-repeat center center / cover" data-background="/sites/default/files/styles/large/public/2024-11/202410-267_167.jpg?itok=9FkCAvwX" class="component-preview-cards box-pattern"> <a class="box-link" target="" href="/fr/news/press-release/cern/cern-council-selects-mark-thomson-next-director-general-starting-2026"></a> <div class="component-preview-cards__veil"></div> <div class="component-preview-cards__box_wrapper"> <div class="component-preview-cards__box"> <div class="preview-card__title"> <h3 class="standard-title"> <a href="/fr/news/press-release/cern/cern-council-selects-mark-thomson-next-director-general-starting-2026" hreflang="fr" title="Le Conseil du CERN choisit Mark Thomson comme prochain directeur général du CERN à compter de 2026"> <span> Le Conseil du CERN choisit Mark Thomson comme... </span> </a> </h3> </div> <div class="preview-card__body"></div> <div class="preview-cards__subtext"> <div class="preview-card__category" style="color:"> At CERN </div> <div class="preview-card__category" style="color:"> Press release </div> <div class="preview-card__date" style="color:"> <time datetime="2024-11-06T11:00:02Z">6 novembre, 2024</time> </div> </div> </div> </div> </div> </div> <div class="views-row"> <div data-history-node-id="191152" id="preview-card--2" class="component-preview-cards box-pattern" style="background:url('/sites/default/files/styles/large/public/2024-10/ba1938f2-89a3-4bdd-bd79-5b83ed6f3e35.JPG?itok=Lh4ptU3U') no-repeat center center / cover" data-background="/sites/default/files/styles/large/public/2024-10/ba1938f2-89a3-4bdd-bd79-5b83ed6f3e35.JPG?itok=Lh4ptU3U" class="component-preview-cards box-pattern"> <a class="box-link" target="" href="/fr/news/news/cern/estonian-flag-raised-cern"></a> <div class="component-preview-cards__veil"></div> <div class="component-preview-cards__box_wrapper"> <div class="component-preview-cards__box"> <div class="preview-card__title"> <h3 class="standard-title"> <a href="/fr/news/news/cern/estonian-flag-raised-cern" hreflang="fr" title="Le drapeau de l’Estonie hissé au CERN"> <span> Le drapeau de l’Estonie hissé au CERN </span> </a> </h3> </div> <div class="preview-card__body"></div> <div class="preview-cards__subtext"> <div class="preview-card__category" style="color:"> At CERN </div> <div class="preview-card__category" style="color:"> News </div> <div class="preview-card__date" style="color:"> <time datetime="2024-10-17T12:33:54Z">17 octobre, 2024</time> </div> </div> </div> </div> </div> </div> <div class="views-row"> <div data-history-node-id="191124" id="preview-card--3" class="component-preview-cards box-pattern" style="background:url('/sites/default/files/styles/large/public/2024-10/Picture%201.jpg?itok=YeI6iEmy') no-repeat center center / cover" data-background="/sites/default/files/styles/large/public/2024-10/Picture%201.jpg?itok=YeI6iEmy" class="component-preview-cards box-pattern"> <a class="box-link" target="" href="/fr/news/press-release/physics/particle-physicists-chart-course-future"></a> <div class="component-preview-cards__veil"></div> <div class="component-preview-cards__box_wrapper"> <div class="component-preview-cards__box"> <div class="preview-card__title"> <h3 class="standard-title"> <a href="/fr/news/press-release/physics/particle-physicists-chart-course-future" hreflang="fr" title="La physique des particules dessine son avenir"> <span> La physique des particules dessine son avenir... </span> </a> </h3> </div> <div class="preview-card__body"></div> <div class="preview-cards__subtext"> <div class="preview-card__category" style="color:"> Physics </div> <div class="preview-card__category" style="color:"> Press release </div> <div class="preview-card__date" style="color:"> <time datetime="2024-10-11T09:08:31Z">11 octobre, 2024</time> </div> </div> </div> </div> </div> </div> <div class="views-row"> <div data-history-node-id="191077" id="preview-card--4" class="component-preview-cards box-pattern" style="background:url('/sites/default/files/styles/large/public/2024-10/10-Family-photo%20%281%29.jpg?itok=UtnK0P4h') no-repeat center center / cover" data-background="/sites/default/files/styles/large/public/2024-10/10-Family-photo%20%281%29.jpg?itok=UtnK0P4h" class="component-preview-cards box-pattern"> <a class="box-link" target="" href="/fr/news/press-release/cern/blowing-out-70-candles-cern-celebrates-seven-decades-discoveries-and-looks"></a> <div class="component-preview-cards__veil"></div> <div class="component-preview-cards__box_wrapper"> <div class="component-preview-cards__box"> <div class="preview-card__title"> <h3 class="standard-title"> <a href="/fr/news/press-release/cern/blowing-out-70-candles-cern-celebrates-seven-decades-discoveries-and-looks" hreflang="fr" title="Le CERN souffle ses 70 bougies, l’occasion de célébrer sept décennies de découvertes et de se projeter vers un futur brillant pour la science et l’innovation"> <span> Le CERN souffle ses 70 bougies, l’occasion de... </span> </a> </h3> </div> <div class="preview-card__body"></div> <div class="preview-cards__subtext"> <div class="preview-card__category" style="color:"> At CERN </div> <div class="preview-card__category" style="color:"> Press release </div> <div class="preview-card__date" style="color:"> <time datetime="2024-10-01T10:00:00Z">1 octobre, 2024</time> </div> </div> </div> </div> </div> </div> </div> <div class="view-footer"> <p class="cern-btn"><a class="cern-btn" href="/fr/news?audience=23">Dernières actualités</a></p> </div> </div> </div> </div> <div class="col-xs-0 col-sm-0 col-md-6 col-lg-6 col-item-megamenu"> <div 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/.navbar-collapse --> </div> <!-- /.container-fluid --> </nav> </nav> </div> </section> </div> </div> </div> </div> </header> <main role="main"> <a id="main-content" tabindex="-1"></a> <div class="container-fluid cern-page-display-page cern-page-display-story_page"> <div class="has-no-column wrapper-center col-md-12 col-sm-12 col-xs-12"> <div class="region region-content"> <div data-drupal-messages-fallback class="hidden"></div> <div data-drupal-messages-fallback class="hidden"></div> <div class="layout layout__region story-page-node-layout-content"> <div class="field--items"> <div class="field--item"> <div class="component-row component-row__display__fluid section-navigation component-row__has-header effect_none is_half_height"> <div class="background__veil"></div> <div class="background-component background__cds_media" style="height: 100%;"> <figure class="cds-image" data-record-id="2302374" data-filename="201802-025_01" id="CERN-PHOTO-201801-025-18"> <a href="//cds.cern.ch/images/CERN-PHOTO-201801-025-18" title="View on CDS"> <img alt="LHCb YETS 2018" src="//cds.cern.ch/images/CERN-PHOTO-201801-025-18/file?size=large"/> </a> <figcaption> LHCb YETS 2018 <span> (Image: CERN)</span> </figcaption> </figure> </div> <div class="component-row__row"> <div class="component-row__column component-row__center section-has-no-column col-md-12 col-sm-12 col-xs-12"> <div class="box-effects-wrapper "> <div class="cern-component-header-blocks component-header"> <div id="header-blocks--2" class="owl-carousel owl-theme component-header__carousel header-carousel"> <div class="header-block"> <div class="header-block__title"> <h3 class="header-block__name" > <span>LHCb</span> <span class="header-block__name__underline"></span> </h3> <span class="header-block__subhead" ><hr> <p class="text-align-center">LHCb nous permettrera de comprendre pourquoi nous vivons dans un Univers qui semble être constitué de matière, sans aucune présence d’antimatière</p> </span> </div> </div> </div> </div> <a class="endof-cern-header-blocks"></a> </div> </div> </div> </div> </div> <div class="field--item"> <div class="component-row component-row__display__centered section-navigation effect_none"> <div class="component-row__row"> <div class="component-row__column component-row__center section-has-no-column col-md-12 col-sm-12 col-xs-12"> <div class="box-effects-wrapper "> <div class="component-margin component-margin-small" ></div> </div> </div> </div> </div> </div> <div class="field--item"> <div class="component-row component-row__display__centered section-navigation effect_none"> <div class="component-row__row"> <div class="component-row__column component-row__center section-has-no-column col-md-12 col-sm-12 col-xs-12"> <div class="box-effects-wrapper "> <div class="text-component text-component-page clearfix"> <div class="text-component-text cern_full_html"> <p>L’expérience LHCb (<em><a href="https://lhcb.web.cern.ch/">Large Hadron Collider beauty</a></em>) explore les légères différences qui existent entre matière et antimatière grâce à l’étude d’un type de particule appelé « quark beauté » ou « quark b ».</p> <p>Au lieu d’utiliser un détecteur fermé au niveau du point de collision, tel que ceux d’<a href="https://home.cern/fr/about/experiments/atlas">ATLAS</a> et de <a href="https://home.cern/fr/about/experiments/cms">CMS</a>, l’expérience LHCb a recours à plusieurs sous-détecteurs conçus pour observer principalement les particules émises « à petits angles », vers l’avant, dans le sens du faisceau. Le premier sous-détecteur est placé à proximité du point de collision ; les autres se suivent sur une longueur de 20 mètres.</p> <p>Le LHC produit une grande variété de quarks, qui se désintègrent rapidement en d’autres particules. Pour intercepter les quarks b, la collaboration LHCb a mis au point des trajectographes mobiles perfectionnés et les a installés au plus près de la trajectoire des faisceaux dans le LHC.</p> <p>Le détecteur de LHCb, qui pèse 5 600 tonnes, est constitué d'un spectromètre à petits angles et de détecteurs planaires. Long de 21 mètres, haut de 10 mètres et large de 13 mètres, il est installé à 100 mètres sous terre, à proximité de la commune de Ferney-Voltaire (France). La collaboration LHCb compte plus de 1 565 scientifiques, ingénieurs et techniciens originaires de 20 pays (mars 2022). Pour les dernières informations, voir <a href="https://greybook.cern.ch/experiment/detail?id=LHCB">ici</a>.</p> <figure class="cds-image" id="CERN-PHOTO-202204-063-2"><a href="https://artsandculture.google.com/streetview/lhcb-detector/QQG2a2JP2ZUvGg?sv_lng=6.096386383630033&sv_lat=46.2411801009&sv_h=22.060848152718222&sv_p=6.369192974212652&sv_pid=F0k5y7X_NYsAAAQJODj0_g&sv_z=0.054306419557916596" target="_blank" title="Explore in Google Street View"><img alt="2022,LHCb" src="//cds.cern.ch/images/CERN-PHOTO-202204-063-2/file?size=large"></a> <figcaption>Cliquez sur l'image ci-dessus pour explorer l'expérience LHCb grâce à<a href="https://artsandculture.google.com/streetview/lhcb-detector/QQG2a2JP2ZUvGg?sv_lng=6.096386383630033&sv_lat=46.2411801009&sv_h=22.060848152718222&sv_p=6.369192974212652&sv_pid=F0k5y7X_NYsAAAQJODj0_g&sv_z=0.054306419557916596"> Google Street View</a><span> (Image : CERN)</span></figcaption></figure> </div> </div> </div> </div> </div> </div> </div> </div> </div> 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