{"id":245548,"date":"2026-10-17T01:34:41","date_gmt":"2026-10-17T06:34:41","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/10\/solving-the-gallium-anomaly-new-calculation-may-explain-neutrino-shortfall-without-invoking-new-particles"},"modified":"2026-10-17T01:34:41","modified_gmt":"2026-10-17T06:34:41","slug":"solving-the-gallium-anomaly-new-calculation-may-explain-neutrino-shortfall-without-invoking-new-particles","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/10\/solving-the-gallium-anomaly-new-calculation-may-explain-neutrino-shortfall-without-invoking-new-particles","title":{"rendered":"Solving the gallium anomaly: New calculation may explain neutrino shortfall without invoking new particles"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/solving-the-gallium-anomaly-new-calculation-may-explain-neutrino-shortfall-without-invoking-new-particles2.jpg\"><\/a><\/p>\n<p>Glimpses of the \u201cgallium anomaly\u201d were first seen in the mid-1990s, but it was first clearly discovered and stated in 2007 by neutrino physicist Carlo Giunti of Italy. The problem is simple to state but potentially very important: about 20% fewer electron neutrinos were seen to be captured by gallium nuclei than expected.<\/p>\n<p>But now the anomaly looks to be explained with a new calculation by a collaboration of physicists at Italian universities and research laboratories\u2014and the calculation agrees with the observed number of electron neutrinos captured. Their work is <a href=\"https:\/\/link.aps.org\/doi\/10.1103\/5pvf-mcr1\" target=\"_blank\">published<\/a> in the journal Physical Review Letters.<\/p>\n<p>When an electron neutrino (one of the three types of neutrinos) collides with a neutron in the nucleus of gallium-71 (\u2077\u00b9Ga), an electron is produced and the neutron transforms to a proton as a down quark converts to an up quark. The gallium nucleus then becomes a germanium-71 (\u2077\u00b9Ge) nucleus. This is a weak force interaction with a W+ particle exchange, a so-called charged-current weak interaction, and was historically important to the solar neutrino problem recognized in the 1960s.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Glimpses of the \u201cgallium anomaly\u201d were first seen in the mid-1990s, but it was first clearly discovered and stated in 2007 by neutrino physicist Carlo Giunti of Italy. The problem is simple to state but potentially very important: about 20% fewer electron neutrinos were seen to be captured by gallium nuclei than expected. But now [\u2026]<\/p>\n","protected":false},"author":427,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48],"tags":[],"class_list":["post-245548","post","type-post","status-publish","format-standard","hentry","category-particle-physics"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/245548","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\/427"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=245548"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/245548\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=245548"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=245548"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=245548"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}