{"id":153327,"date":"2022-12-20T17:22:39","date_gmt":"2022-12-20T23:22:39","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2022\/12\/hint-of-crack-in-standard-model-vanishes-in-lhc-data"},"modified":"2022-12-20T17:22:39","modified_gmt":"2022-12-20T23:22:39","slug":"hint-of-crack-in-standard-model-vanishes-in-lhc-data","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2022\/12\/hint-of-crack-in-standard-model-vanishes-in-lhc-data","title":{"rendered":"Hint of crack in standard model vanishes in LHC data"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/hint-of-crack-in-standard-model-vanishes-in-lhc-data2.jpg\"><\/a><\/p>\n<p>\u201cMy first impression is that the analysis is much more robust than before,\u201d says Florencia Canelli, an experimental particle physicist at the University of Zurich in Switzerland who is a senior member of a separate LHC experiment. It has revealed how a number of surprising subtleties had conspired to produce an apparent anomaly, she says.<\/p>\n<p>Renato Quagliani, an LHCb physicist at the Swiss Federal Polytechnic Institute (EPFL) in Lausanne, reported the results at CERN on 20 December, in a seminar that also attracted more than 700 viewers online. The LHCb collaboration also posted two preprints on the arXiv repository<sup><a href=\"https:\/\/www.nature.com\/articles\/d41586-022-04545-z#ref-CR1\">1<\/a><\/sup><sup>,<\/sup><sup><a href=\"https:\/\/www.nature.com\/articles\/d41586-022-04545-z#ref-CR2\">2<\/a><\/sup>.<\/p>\n<p>LHCb first reported a tenuous discrepancy in the production of muons and electrons in 2014. When collisions of protons produced massive particles called B mesons, these quickly decayed. The most frequent decay pattern produced another type of meson, called a kaon, plus pairs of particles and their antiparticles \u2014 either an electron and a positron or a muon and an antimuon. The standard model predicted that the two types of pairs should occur with roughly the same frequency, but LHCb data suggested that the electron-positron pairs occurred more often.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u201cMy first impression is that the analysis is much more robust than before,\u201d says Florencia Canelli, an experimental particle physicist at the University of Zurich in Switzerland who is a senior member of a separate LHC experiment. It has revealed how a number of surprising subtleties had conspired to produce an apparent anomaly, she says. [\u2026]<\/p>\n","protected":false},"author":511,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48],"tags":[],"class_list":["post-153327","post","type-post","status-publish","format-standard","hentry","category-particle-physics"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/153327","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/511"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=153327"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/153327\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=153327"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=153327"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=153327"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}