{"publisher":{"name":"MediaBias News","url":"https://mediabias.news","methodology":"https://mediabias.news/methodology","editorialPrinciples":"https://mediabias.news/editorial-principles","corrections":"https://mediabias.news/corrections"},"scoreGuide":{"trust":"How well corroborated and evidenced the source reporting is. 0-100, higher is better.","critic":"Craft quality of the source journalism: context, balance, fact vs comment. 0-100, higher is better.","hype":"How far the source presentation runs ahead of substance. 0-100, LOWER IS BETTER.","scope":"Scores assess the original reporting this article was written from, not the truth of the underlying event and not the quality of this write-up."},"assessmentGuide":{"type":"coverage-and-source-reporting-analysis","factCheck":{"status":"not-performed","note":"Media Bias News compares coverage and scores the source reporting. It does not currently publish a ClaimReview verdict on whether the underlying event or claim is true."},"sourceFactuality":{"note":"Factuality values describe published ratings of the outlets that covered the story. They are not a factuality verdict on this story or its claims."}},"story":{"id":"https://mediabias.news/tech/physicists-detect-evidence-of-rare-particle-decay-at-cern","slug":"physicists-detect-evidence-of-rare-particle-decay-at-cern","url":"https://mediabias.news/tech/physicists-detect-evidence-of-rare-particle-decay-at-cern","title":"Physicists Detect Evidence of Rare Particle Decay at CERN","subtitle":"LHCb experiment finds 3.2 sigma evidence for a decay predicted to occur once in ten billion events.","excerpt":"Physicists at CERN's Large Hadron Collider have detected evidence of a rare beauty particle decay into two muons. The LHCb experiment's finding, with a statistical significance of 3.2 sigma, is a step towards confirming a process predicted to occur once in ten billion decays, a search that has been ongoing for over 40 years.","category":"Science & Tech","area":null,"publishedAt":"2026-11-03T19:45:36.599Z","sourceReportedAt":"2026-11-03T19:16:00.000Z","updatedAt":"2026-11-03T19:45:36.599Z","readTime":"4 min read","scores":{"trust":58,"critic":66,"hype":48,"notes":{"trust":"The central claim is attributed to the LHCb Collaboration and supported by 29 digests.","critic":"The reporting clearly separates fact from comment and provides specific details about the scientific process.","hype":"Headlines use terms like 'breakthrough' and 'groundbreaking discovery' for a 3.2-sigma result."}},"tags":["#ParticlePhysics","#CERN","#LHCb","#Zeptoverse","#PhysicsBreakthrough","#DarkMatter"],"entities":["CERN","Large Hadron Collider","LHCb experiment","Chris Parkes","Niladri Sahoo","Conor Fitzpatrick"],"body":[{"type":"key_takeaways","items":["Physicists using the LHCb experiment at CERN have found evidence of a rare beauty particle decay into two muons.","This decay is predicted to happen only once in every ten billion such particle decays.","The result has a statistical significance of 3.2 sigma, which is below the five-sigma threshold required for a confirmed discovery in particle physics.","The search for this specific particle decay has been ongoing for more than 40 years."]},{"type":"paragraph","text":"Physicists at CERN's Large Hadron Collider have detected evidence of a rare decay of a beauty particle into two muons. The LHCb experiment's findings indicate this process, predicted to occur once in ten billion decays, has been observed with a statistical significance of 3.2 sigma. A five-sigma result is the standard for confirming a discovery in particle physics. This search has been underway for over 40 years."},{"type":"heading","text":"Disagreement on statistical significance"},{"type":"paragraph","text":"While the majority of reports state the statistical significance of the finding is 3.2 sigma, EuropaWire.eu states the result is 3.2-sigma evidence. DiarioBitcoin reports evidence of a breakdown of beauty particles by ten billion, with a significance of 3.2 standard deviations. News Anyway also reports the upgraded LHCb experiment has found first evidence of the Bd to mu mu decay at 3.2 sigma."},{"type":"heading","text":"What the coverage left out"},{"type":"paragraph","text":"None of the left-rated digests mention the specific statistical significance of 3.2 sigma. None of the right-rated digests mention the 40-year duration of the search for this particle decay. None of the centre-rated digests mention the 40-year duration of the search for this particle decay."}],"basedOn":[{"sourceName":"Euronews","url":"https://euronews.com/video/2026/11/05/zeptoverse-cern-scientists-uncover-evidence-of-extraordinarily-rare-particle-decay","headline":"Video. ‘Zeptoverse’: CERN scientists uncover evidence of extraordinarily rare particle decay","angle":"","publishedAt":"2026-11-05T07:02:53.000Z"},{"sourceName":"DEV Community","url":"https://dev.to/ashish_624379625242c5d263/the-neutrino-nobody-looked-for-and-the-protein-nobody-could-see-properly-until-vr-changed-the-1b5k","headline":"The Neutrino Nobody Looked For, and the Protein Nobody Could See Properly Until VR Changed the Viewing Angle","angle":"","publishedAt":"2026-11-05T06:57:54.000Z"},{"sourceName":"srpskainfo.com","url":"https://srpskainfo.com/magazin/desava-se-jednom-u-10-milijardi-slucajeva-fizicari-usli-u-trag-procesu-koji-bi-mogao-da-promijeni-zakone-fizike","headline":"HAPPENS ONCE IN 10 BILLION CASES Physicists Have Tracked Down a Process that Could Change the Laws of Physics","angle":"","publishedAt":"2026-11-05T06:09:09.000Z"},{"sourceName":"El Universo","url":"https://eluniverso.com/larevista/sociedad/que-es-el-zeptoverso-el-mundo-mas-pequeno-jamas-detectado-en-la-naturaleza-y-por-que-es-clave-para-entender-el-universo-nota","headline":"What Is the “Zeptoverse”, the Smallest World Ever Detected in Nature, and Why It Is Key to Understanding the Universe","angle":"","publishedAt":"2026-11-05T02:00:00.000Z"},{"sourceName":"BioBioChile","url":"https://biobiochile.cl/noticias/ciencia-y-tecnologia/ciencia/2026/11/04/captan-primeras-senales-de-la-posible-existencia-del-zeptoverso-el-mundo-mas-pequeno-de-la-naturaleza.shtml","headline":"First Signs of the Possible Existence of the Zeptoverse, the Smallest World of Nature, Are Captured","angle":"","publishedAt":"2026-11-05T01:43:17.000Z"},{"sourceName":"alfavita.gr","url":"https://alfavita.gr/epistimi/566884_cern-htypoyn-tin-porta-enos-agnostoy-sympantos-ti-anazitoyn-oi-epistimones","headline":"CERN: \"Knock on the Door\" of an Unknown Universe - What Are Scientists Looking For?","angle":"","publishedAt":"2026-11-04T23:36:57.411Z"},{"sourceName":"ingenieur.de - Jobbörse und Nachrichtenportal für Ingenieure","url":"https://ingenieur.de/1-unter-10-milliarden-cern-findet-nach-40-jahren-eine-spur-4e9928b7-7952-4cc2-8c6d-4f1c0ecfeb7b","headline":"1 Under 10 Billion: CERN Finds a Trail After 40 Years","angle":"","publishedAt":"2026-11-04T19:30:00.000Z"},{"sourceName":"rbc.ua","url":"https://rbc.ua/ukr/news/100-milyardiv-raziv-menshi-atom-k-fiziki-1793802143.html","headline":"100 Billion Times Smaller than the Atom: How Physicists Look for Traces of Dark Matter","angle":"","publishedAt":"2026-11-04T17:12:23.000Z"},{"sourceName":"Tech Explorist","url":"https://techexplorist.com/42-years-physicists-closer-unlocking-mysterious-zeptoverse/105957","headline":"After 42 Years, physicists get closer to unlocking the mysterious Zeptoverse","angle":"","publishedAt":"2026-11-04T16:15:51.000Z"},{"sourceName":"La Brújula Verde","url":"https://labrujulaverde.com/2026/11/los-cientificos-estan-a-punto-de-acceder-al-zeptouniverso-un-mundo-un-millon-de-veces-mas-pequeno-que-un-proton-donde-podrian-esconderse-particulas-y-fuerzas-todavia-desconocidas","headline":"Scientists Are About to Access the Zeptouniverse, a World a Million Times Smaller than a Proton Where Particles and Forces Still Unknown Could Be Hidden.","angle":"","publishedAt":"2026-11-04T15:48:51.000Z"},{"sourceName":"Česká televize","url":"https://ct24.ceskatelevize.cz/clanek/veda/cern-zachytil-vzacny-rozpad-castic-klepeme-na-dvere-do-zeptovesmiru-raduji-se-vedci-379268","headline":"CERN Captures Rare Particle Decay. 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