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<a class="dropdown-toggle"> Le CERN </a> <div class="cern-dropdown-menu row"> <div class="col-xs-12 col-sm-12 col-md-4 col-lg-4 col-item-megamenu"> <div class="block-custom-wrapper block-content block-content--type-basic block-content--view-mode-default ds-1col clearfix"> <div class="field field--name-body field--type-text-with-summary field--label-hidden field--item"><h2>CERN</h2> <p>Au CERN, nous sondons la structure fondamentale de la matière qui compose tout ce qui nous entoure. Pour ce faire, nous utilisons les instruments scientifiques les plus grands et les plus complexes du monde.</p> <p class="cern-btn"><a href="/fr/about">En savoir plus</a></p> </div> </div> </div> <div class="col-xs-0 col-sm-0 col-md-8 col-lg-8 col-item-megamenu"> <div class="row"> <div class="col-xs-12 col-sm-12 col-md-4 col-lg-4 col-item-megamenu"> <ul class="cern-submenu"> <li> <p class="h2 cernmenu-level-0"> <a href="/fr/about/who-we-are" data-drupal-link-system-path="node/5898">Qui sommes-nous ?</a> </p> <ul class=""> <li> <p class=" cernmenu-level-1 cernmenu-level-last "> <a href="/fr/about/who-we-are/our-mission" data-drupal-link-system-path="node/5273">Nos missions</a> </p> </li> <li> <p class=" cernmenu-level-1 cernmenu-level-last "> <a href="/fr/about/who-we-are/our-governance" data-drupal-link-system-path="node/5277">Notre gouvernance</a> </p> </li> <li> <p class=" cernmenu-level-1 cernmenu-level-last "> <a href="/fr/about/who-we-are/our-governance/member-states" 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href="/fr/science/accelerators/large-hadron-collider">Grand collisionneur de hadrons</a></p> </li> <li> <p class="cernmenu-level-1 cernmenu-level-last "><a href="/fr/science/computing/birth-web">La naissance du web</a></p> </li> <li> <p class="cernmenu-level-1 cernmenu-level-last "><a href="/fr/science/physics/antimatter">Antimatière</a></p> </li> </ul> </div> </div> </div> <div class="col-xs-12 col-sm-12 col-md-4 col-lg-4 col-item-megamenu"> </div> </div> </div> <div class="close-cern-dropdown"></div> </div> </li> <li class="cern-dropdown"> <a class="dropdown-toggle"> Actualités </a> <div class="cern-dropdown-menu row"> <div class="col-xs-12 col-sm-12 col-md-6 col-lg-6 col-item-megamenu"> <div class="views-element-container form-group"> <div class="view view-cern-news-menu-featured view-id-cern_news_menu_featured view-display-id-block_1 js-view-dom-id-f8a307631b88afe01321a4f6d4ba11d6c6356233dc97754efeeb632faa53869c cern-view-display-block cern-view-display-block_1 clearfix"> <div 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="192017" id="preview-card" class="component-preview-cards box-pattern" style="background:url('/sites/default/files/styles/large/public/2025-03/FCC_pp-TUNNEL_STATIC-04-PX%20%282%29.png?itok=pivZ2hkc') no-repeat center center / cover" data-background="/sites/default/files/styles/large/public/2025-03/FCC_pp-TUNNEL_STATIC-04-PX%20%282%29.png?itok=pivZ2hkc" class="component-preview-cards box-pattern"> <a class="box-link" target="" href="/fr/news/news/accelerators/cern-releases-report-feasibility-possible-future-circular-collider"></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/accelerators/cern-releases-report-feasibility-possible-future-circular-collider" hreflang="fr" title="Le CERN publie son rapport sur la faisabilité d’un éventuel Futur collisionneur circulaire"> <span> Le CERN publie son rapport sur la faisabilité... </span> </a> </h3> </div> <div class="preview-card__body"></div> <div class="preview-cards__subtext"> <div class="preview-card__category" style="color:"> Accelerators </div> <div class="preview-card__category" style="color:"> News </div> <div class="preview-card__date" style="color:"> <time datetime="2025-03-31T18:00:00Z">31 mars, 2025</time> </div> </div> </div> </div> </div> </div> <div class="views-row"> <div data-history-node-id="191995" id="preview-card--2" class="component-preview-cards box-pattern" style="background:url('/sites/default/files/styles/large/public/2025-03/202403-050_211.jpg?itok=GnriXUQ1') no-repeat center center / cover" data-background="/sites/default/files/styles/large/public/2025-03/202403-050_211.jpg?itok=GnriXUQ1" class="component-preview-cards box-pattern"> <a class="box-link" target="" href="/fr/news/press-release/physics/new-piece-matter-antimatter-puzzle"></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/new-piece-matter-antimatter-puzzle" hreflang="fr" title="Asymétrie matière-antimatière : une nouvelle pièce du puzzle dévoilée"> <span> Asymétrie matière-antimatière : une nouvelle ... </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="2025-03-25T16:00:00Z">25 mars, 2025</time> </div> </div> </div> </div> </div> </div> <div class="views-row"> <div data-history-node-id="191974" id="preview-card--3" class="component-preview-cards box-pattern" style="background:url('/sites/default/files/styles/large/public/2025-03/CollideCopenhagen_Grace_1920x1080_03.jpg?itok=2L7HtDl4') no-repeat center center / cover" data-background="/sites/default/files/styles/large/public/2025-03/CollideCopenhagen_Grace_1920x1080_03.jpg?itok=2L7HtDl4" class="component-preview-cards box-pattern"> <a class="box-link" target="" href="/fr/news/news/cern/cern-announces-winner-third-collide-copenhagen-residency"></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/cern-announces-winner-third-collide-copenhagen-residency" hreflang="fr" title="Le CERN annonce la lauréate du prix de résidence Collide Copenhagen"> <span> Le CERN annonce la lauréate du prix de réside... </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="2025-03-18T13:00:00Z">18 mars, 2025</time> </div> </div> </div> </div> </div> </div> <div class="views-row"> <div data-history-node-id="191883" id="preview-card--4" class="component-preview-cards box-pattern" style="background:url('/sites/default/files/styles/large/public/2025-02/favero_cedric_10_1.jpg?itok=LOsewi62') no-repeat center center / cover" data-background="/sites/default/files/styles/large/public/2025-02/favero_cedric_10_1.jpg?itok=LOsewi62" class="component-preview-cards box-pattern"> <a class="box-link" target="" href="/fr/news/press-release/cern/cern-invites-photographers-explore-colliders-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/cern/cern-invites-photographers-explore-colliders-future" hreflang="fr" title="Le CERN invite les photographes à découvrir les collisionneurs du futur"> <span> Le CERN invite les photographes à découvrir l... </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="2025-02-26T10:02:24Z">26 février, 2025</time> </div> </div> </div> </div> </div> </div> </div> <div class="view-footer"> <p class="cern-btn"><a 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Subatomic particles are made to collide together at close to the speed of light. The process gives us clues about how the particles interact, and provides insights into the fundamental laws of nature. We want to advance the boundaries of human knowledge by delving into the smallest building blocks of our universe.</p> <figure class="breakout-right"><div><iframe allow="autoplay; encrypted-media" allowfullscreen frameborder="0" height="400px" src="https://www.youtube-nocookie.com/embed/7WhRJV_bAiE?rel=0"></iframe></div> <figcaption>(Video: CERN)</figcaption></figure> <p class="column-left image-breakout">The instruments used at CERN are purpose-built <a href="/science/accelerators/how-accelerator-works">particle accelerators</a> and <a href="/science/experiments/how-detector-works">detectors</a>. Accelerators boost beams of particles to high energies before the beams are made to collide with each other or with stationary targets. Detectors observe and record the results of these collisions.</p> <p class="column-left image-breakout">Founded in 1954, the CERN laboratory sits astride the Franco-Swiss border near Geneva. It was one of Europe's first joint ventures and now has 22 <a href="about/member-states">member states</a>.</p> </div> </div> <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"> <h2>What does “CERN” stand for?</h2> <p class="column-left image-breakout">At an intergovernmental meeting of UNESCO in Paris in December 1951, the first resolution concerning the establishment of a European Council for Nuclear Research (in French <em>Conseil Européen pour la Recherche Nucléaire)</em> was adopted.</p> <p class="column-left image-breakout">Two months later, an agreement was signed establishing the provisional Council – the acronym CERN was born.</p> <p class="column-left image-breakout">Today, our understanding of matter goes much deeper than the nucleus, and CERN's main area of research is particle physics. Because of this, the laboratory operated by CERN is often referred to as the European Laboratory for Particle Physics.</p> </div> </div> <div class="component-call-to-action left"> <div class="component-call-to-action__wrapper has-icon" style="background:rgba(8,85,160,1)"> <a href="/fr/about/who-we-are/our-history" title="Learn more about CERN’s history"> <span style="color:#FFFFFF">Learn more about CERN’s history</span> </a> </div> </div> <div class="component-margin component-margin-medium" ></div> <div class="text-component text-component-page clearfix"> <div class="text-component-text cern_full_html"> <h2>What is the LHC?</h2> <p class="column-left image-breakout">The Large Hadron Collider (LHC) is the world’s largest and most powerful <a href="about/how-accelerator-works">particle accelerator</a>. It first started up on 10 September 2008, and remains the latest addition to CERN’s <a href="about/accelerators">accelerator complex</a>. The LHC consists of a 27-kilometre ring of superconducting magnets with a number of accelerating structures to boost the energy of the particles along the way.</p> <p class="column-left image-breakout">The beams inside the LHC are made to collide at four locations around the accelerator ring, corresponding to the positions of four particle detectors – <a href="about/experiments/atlas">ATLAS</a>, <a href="about/experiments/cms">CMS</a>, <a href="about/experiments/alice">ALICE</a> and <a href="about/experiments/lhcb">LHCb.</a></p> </div> </div> <div class="component-call-to-action left"> <div class="component-call-to-action__wrapper has-icon" style="background:rgba(8,85,160,1)"> <a href="/fr/science/accelerators/large-hadron-collider" title="Learn more about the Large Hadron Collider"> <span style="color:#FFFFFF">Learn more about the Large Hadron Collider</span> </a> </div> </div> <div class="component-margin component-margin-small" ></div> </div> </div> </div> </div> </div> <div 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luminosité"> <span> LHC à haute luminosité </span> </a> </h3> </div> </div> </div> <div class="views-row"> <div class="faq-cards__veil"></div> <div class="faq-box-pattern" data-background="url('/sites/default/files/2018-10/Physics.jpg') no-repeat center center / cover"> <div class="faq-box-link"> <h3> <a href="/fr/resources/faqs/cern-and-higgs-boson" hreflang="fr" title="Le CERN et le boson de Higgs"> <span> Le CERN et le boson de Higgs </span> </a> </h3> </div> </div> </div> <div class="views-row"> <div class="faq-cards__veil"></div> <div class="faq-box-pattern" data-background="url('/sites/default/files/2018-10/Accelerators_0.jpg') no-repeat center center / cover"> <div class="faq-box-link"> <h3> <a href="/fr/resources/faqs/facts-and-figures-about-lhc" hreflang="fr" title="Chiffres clés du LHC"> <span> Chiffres clés du LHC </span> </a> </h3> </div> </div> </div> </div> <div class="view-footer"> <a href="/resources/faqs"> View all FAQs </a> </div> </div> </div> </div> </div> </div> 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