{"id":474187,"date":"2022-07-15T00:15:27","date_gmt":"2022-07-14T21:15:27","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/researchers-measure-rare-particle-decay-with-high-precision\/"},"modified":"2022-07-15T00:15:27","modified_gmt":"2022-07-14T21:15:27","slug":"researchers-measure-rare-particle-decay-with-high-precision","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/researchers-measure-rare-particle-decay-with-high-precision\/","title":{"rendered":"#Researchers measure rare particle decay with high precision"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a3650daa6f62\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #dd3333;color:#dd3333\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #dd3333;color:#dd3333\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a3650daa6f62\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/buradabiliyorum.com\/en\/researchers-measure-rare-particle-decay-with-high-precision\/#%E2%80%9CResearchers_measure_rare_particle_decay_with_high_precision%E2%80%9D\" >&#8220;Researchers measure rare particle decay with high precision&#8221;<\/a><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"%E2%80%9CResearchers_measure_rare_particle_decay_with_high_precision%E2%80%9D\"><\/span>&#8220;Researchers measure rare particle decay with high precision&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<div>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2022\/cms-measures-rare-part.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/2022\/cms-measures-rare-part.jpg\" data-sub-html=\"Visualization of a decay of a B&lt;sub&gt;s&lt;\/sub&gt; meson in Run 2 data. The two red lines correspond to the two muons from the decay. Credit: CERN\">\n<figure class=\"article-img\">\n            <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/scx1.b-cdn.net\/csz\/news\/800a\/2022\/cms-measures-rare-part.jpg\" alt=\"CMS measures rare particle decay with high precision\" title=\"Visualization of a decay of a B&lt;sub&gt;s&lt;\/sub&gt; meson in Run 2 data. The two red lines correspond to the two muons from the decay. Credit: CERN\" width=\"750\" height=\"530\"\/><figcaption class=\"text-darken text-low-up text-truncate-js text-truncate mt-3\">\n                Visualization of a decay of a B<sub>s<\/sub> meson in Run 2 data. The two red lines correspond to the two muons from the decay. Credit: CERN<br \/>\n            <\/figcaption><\/figure>\n<\/p><\/div>\n<\/div>\n<p>At CERN&#8217;s Large Hadron Collider (LHC), studies of rare processes allow scientists to infer the presence of heavy particles, including undiscovered particles, that cannot be directly produced. Such particles are widely anticipated to exist beyond the Standard Model, and could help explain some of the enigmas of the universe, such as the existence of dark matter, the masses of neutrinos (elusive particles originally thought to be massless) and the universe&#8217;s matter-antimatter asymmetry.<\/p>\n<section class=\"article-banner first-banner ads-336x280\">\n         <!-- \/4988204\/Phys_Story_InText_Box --><\/p>\n<\/section>\n<p>One such process is the rare decay of neutral B mesons to a muon and antimuon pair: the heavier cousin of the electron paired with its corresponding antiparticle. There are two types of neutral B mesons: The B<sup>0<\/sup> meson consists of a beauty antiquark and a down quark, while for the B<sub>s<\/sub> meson the down quark is replaced by a strange quark. If there are no new particles affecting these rare decays, researchers have predicted that only one in 250 million B<sub>s<\/sub> mesons will decay into a muon-antimuon pair; for the B<sup>0<\/sup> meson, the process is even more rare, at only one in 10 billion.<\/p>\n<p>Scientists have been searching for experimental confirmation of these decays since the 1980s. Only recently, in 2014, was the first observation of the B<sub>s<\/sub> to muons decay reported in a combined analysis of data taken by the LHCb and CMS collaborations, later confirmed by the ATLAS, CMS and LHCb experiments individually. However, the B<sup>0<\/sup> decay still eludes any attempt to observe it.<\/p>\n<p>Using data from Run 2 of the LHC, the CMS experiment has released a new study of the decay rate and the lifetime of the B<sub>s<\/sub> meson decay, as well as a search for the B<sup>0<\/sup> decay. The new study, presented at the International Conference on High Energy Physics (ICHEP), benefits from not only a large amount of data analyzed, but also advanced machine learning algorithms that single out the rare decay events from the overwhelming background of events produced by millions of particle collisions per second.<\/p>\n<p>The results revealed a very clear signal of the B<sub>s<\/sub> meson decaying to a muon-antimuon pair. The precision of the decay rate measurement exceeds that achieved in previous measurements in other experiments.<\/p>\n<p>Both the observed B<sub>s<\/sub> decay rate, found to be 3.8 \u00b1 0.4 parts in a billion, and its lifetime measurement of 1.8 \u00b1 0.2 picoseconds (one picosecond is one trillionth of a second), are very close to the values predicted by the Standard Model.<\/p>\n<p>As for the B<sup>0<\/sup> decay, although no evidence of it was found from these results, physicists can state with 95% statistical confidence that its decay rate is less than 1 part in 5 billion.<\/p>\n<p>In recent years, a number of anomalies have been observed in other rare B meson decays, with discrepancies between the theoretical predictions and the data\u2014indicating the potential existence of new particles. The new CMS result is much closer to theoretical predictions than these other rare decays and so could help scientists to understand the nature of the anomalies.<\/p>\n<p>Rare B meson decays continue to be of great interest to scientists. With the B<sub>s<\/sub> meson to muons decay firmly established and measured with high precision, scientists are now setting their sights on the ultimate prize: the B<sup>0<\/sup> decay. With large data sets anticipated from LHC Run 3, they hope to catch the first glimpse of this extremely rare process and learn more about the puzzling anomalies.<\/p>\n<hr\/>\n<div class=\"article-main__explore my-4 d-print-none\">\n<p>                                            New LHCb analysis still sees previous intriguing results\n                                        <\/p><\/div>\n<hr class=\"mb-4\"\/>\n<div class=\"article-main__more p-4\">\n                                                                                                <strong>More information:<\/strong><br \/>\n                                                <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/cms.cern\/news\/new-study-rare-b-meson-decays-two-muons\">cms.cern\/news\/new-study-rare-b \u2026 son-decays-two-muons<\/a><\/p><\/div>\n<p>                                        <!-- print only --><\/p>\n<div class=\"d-none d-print-block\">\n<p>                                                 <strong>Citation<\/strong>:<br \/>\n                                                 Researchers measure rare particle decay with high precision (2022, July 14)<br \/>\n                                                 retrieved 15 July 2022<br \/>\n                                                 from https:\/\/phys.org\/<a href=\"https:\/\/buradabiliyorum.com\/en\/category\/news\/\" data-internallinksmanager029f6b8e52c=\"2\" title=\"News\" target=\"_blank\" rel=\"noopener\">news<\/a>\/2022-07-rare-particle-high-precision.html<\/p>\n<p>                                            This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no<br \/>\n                                            part may be reproduced without the written permission. The content is provided for information purposes only.<\/p><\/div>\n<\/p><\/div>\n<p><script id=\"facebook-jssdk\" async=\"\" src=\"https:\/\/connect.facebook.net\/en_US\/sdk.js\"><\/script><\/p>\n<blockquote><p><strong><span style=\"color: #ff6600;\">If you liked the article, do not forget to share it with your friends. Follow us on\u00a0<span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/news.google.com\/publications\/CAAqBwgKMLG0nwswvr63Aw\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">Google News<\/a><\/span>\u00a0too, click on the star and choose us from your favorites.<\/span><\/strong><\/p><\/blockquote>\n<blockquote>\n<p style=\"text-align: center;\">For forums sites go to <span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/forum.buradabiliyorum.com\/\" target=\"_blank\" rel=\"noopener\">Forum.BuradaBiliyorum.Com<\/a><\/span><\/strong>\n<\/p><\/blockquote>\n<blockquote>\n<p style=\"text-align: center;\"><strong>If you want to read more Like this articles, you can visit our <span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/en.buradabiliyorum.com\/science\/\" target=\"_blank\" rel=\"noopener\">Science category.<\/a><\/span><\/strong><\/p>\n<\/blockquote>\n<p><span style=\"color: black;\"><a style=\"color: #ff9900;\" href=\"https:\/\/phys.org\/news\/2022-07-rare-particle-high-precision.html\" target=\"_blank\" rel=\"noopener\">Source<\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#8220;Researchers measure rare particle decay with high precision&#8221; Visualization of a decay of a Bs meson in Run 2 data. The two red lines correspond to the two muons from the decay. Credit: CERN At CERN&#8217;s Large Hadron Collider (LHC), studies of rare processes allow scientists to infer the presence of heavy particles, including undiscovered&#8230;<\/p>\n","protected":false},"author":1,"featured_media":474188,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/scx2.b-cdn.net\/gfx\/news\/2022\/cms-measures-rare-part.jpg","fifu_image_alt":"","footnotes":""},"categories":[16],"tags":[],"class_list":["post-474187","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sciencee"],"_links":{"self":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/474187","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/comments?post=474187"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/474187\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media\/474188"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=474187"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=474187"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=474187"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}