{"id":101832,"date":"2024-07-25T13:47:32","date_gmt":"2024-07-25T13:47:32","guid":{"rendered":"https:\/\/news.talkwithrattan.com\/index.php\/2024\/07\/25\/dark-matter-experiments-get-a-first-peek-at-the-neutrino-fog\/"},"modified":"2024-07-25T13:47:32","modified_gmt":"2024-07-25T13:47:32","slug":"dark-matter-experiments-get-a-first-peek-at-the-neutrino-fog","status":"publish","type":"post","link":"https:\/\/news.talkwithrattan.com\/index.php\/2024\/07\/25\/dark-matter-experiments-get-a-first-peek-at-the-neutrino-fog\/","title":{"rendered":"Dark matter experiments get a first peek at the \u2018neutrino fog\u2019\u00a0"},"content":{"rendered":"<div style=\"text-align:center\"><\/div> \r\n<br><br><div style=\"clear:both\">\n<style><![CDATA[\n.subscribe-cta {\n  color: black;\n  margin-top: 0px;\n  background-color: #D5DDEE;\n  background-size: cover;\n  padding: 20px;\n  border: 1px solid black;\n  border-top: 5px solid black;\n  clear: both;\n}\n\n.centered {\n  text-align:center;\n  margin:auto;\n}\n\n]]><\/style>\n<!-- \/wp:html -->\n\n<!-- wp:group {\"className\":\"subscribe-cta\"} -->\n<div id=\"subscribeConversion\" class=\"wp-block-group subscribe-cta\"><!-- wp:heading {\"textAlign\":\"center\",\"style\":{\"typography\":{\"fontSize\":\"2em\"}}} -->\n<h2 class=\"wp-block-heading has-text-align-center\" style=\"font-size:2em\">Take our AI Survey<\/h2>\n<!-- \/wp:heading -->\n\n<!-- wp:paragraph {\"align\":\"center\",\"style\":{\"typography\":{\"fontSize\":\"1.1em\"}}} -->\n<p class=\"has-text-align-center\" style=\"font-size:1.1em\"><em>Science News <\/em>has partnered with <a href=\"https:\/\/trustingnews.org\/about-us\/\" target=\"_blank\" rel=\"noopener\">Trusting News<\/a> to gather feedback on the potential use of AI in journalism. <strong>Currently, we do not publish any content produced by generative AI<\/strong> (see our <a href=\"https:\/\/www.sciencenews.org\/about-science-news\/journalism-standards-practices#ai-policy\" target=\"_blank\" rel=\"noopener\">policy<\/a>). We do want to hear your views on how <em>Science News<\/em> could use AI responsibly.  Let us know by participating in a short 10 question survey.<\/p>\n<!-- \/wp:paragraph -->\n\n<!-- wp:spacer {\"height\":\"20px\"} -->\n\n<!-- \/wp:spacer -->\n\n<!-- wp:buttons {\"className\":\"centered\",\"layout\":{\"type\":\"flex\",\"justifyContent\":\"center\"}} -->\n\n<!-- \/wp:buttons --><\/div>\n<!-- \/wp:group -->\n\n\n<p>Known as the \u201cneutrino fog,\u201d the signature suggests a new way of studying the difficult-to-detect subatomic particles. But it also points toward the beginning of the end for dark matter detectors of this type, which aim to spot the unidentified massive particles that bulk up the cosmos. As these detectors become more capable, the neutrino fog could obscure potential signs of dark matter.<\/p>\n\n\n\n<p>The XENONnT (pronounced \u201cxenon n-ton\u201d) experiment, at the Gran Sasso National Laboratory in Italy,\u00a0<a href=\"https:\/\/agenda.infn.it\/event\/39713\/contributions\/237829\/\" target=\"_blank\" rel=\"noopener\">saw signs of neutrinos<\/a>\u00a0that had been produced in the sun, physicists reported July 10 at the International Workshop on the Identification of Dark Matter in L\u2019Aquila, Italy. And the\u00a0PandaX-4T experiment, at the China Jinping Underground Laboratory in\u00a0Liangshan,\u00a0saw similar evidence, researchers\u00a0<a href=\"https:\/\/agenda.infn.it\/event\/39713\/contributions\/234119\/\" target=\"_blank\" rel=\"noopener\">reported at the workshop<\/a>\u00a0July 8 and in\u00a0<a href=\"https:\/\/arxiv.org\/abs\/2407.10892\" target=\"_blank\" rel=\"noopener\">a paper submitted July 15<\/a>\u00a0to arXiv.org.<\/p>\n\n\n\n<p>The result \u201copens [a] new door of using our detectors to study neutrinos and searching for associated new physics phenomena,\u201d says physicist Ning Zhou of Shanghai Jiao Tong University, a PandaX deputy spokesperson.<\/p>\n\n\n\n<p>In the nuclear fusion processes that power the sun,\u00a0<a href=\"https:\/\/www.sciencenews.org\/article\/subatomic-particles-give-glimpse-suns-core\">multitudes of neutrinos<\/a>\u00a0are produced in a variety of different reactions (<em>SN: 9\/1\/14<\/em>). Some of the most energetic come from the radioactive decay of boron-8, a type of boron created during the fusion process. Scientists had long predicted that those neutrinos are prevalent enough, and have the appropriate energies, to be seen in dark matter detectors. That\u2019s what the two dark matter detectors have found.<\/p>\n\n\n\n<p>Each experiment houses several metric tons of liquid xenon. If a dark matter particle crashes into the nucleus of a xenon atom, the experiments can detect that nucleus recoiling in response, revealing dark matter\u2019s presence. But neutrinos can also slam into atomic nuclei, causing similar recoils.<\/p><p>This type of interaction, in which a neutrino knocks into an entire atomic nucleus rather than an individual proton or neutron, was\u00a0<a href=\"https:\/\/www.sciencenews.org\/article\/neutrinos-seen-scattering-atoms-nucleus-first-time\">first seen in 2017<\/a>\u00a0in the COHERENT experiment, using neutrinos from a laboratory source (<em>SN: 8\/3\/17<\/em>). The two new experiments mark the first signs of nucleus-thwacking by neutrinos from the sun. Scientists previously detected solar neutrinos\u00a0<a href=\"https:\/\/www.sciencenews.org\/article\/neutrinos-sun-core-nuclear-fusion-reactions-borexino\">by other means<\/a>\u00a0(<em>SN: 6\/24\/20<\/em>).\u00a0<\/p>\n\n\n\n<p>In the future, detecting solar neutrinos via the nuclei they knock around could help physicists understand the particles better. For example, scientists could study the neutrino signal to look for what detectors might be missing:\u00a0<a href=\"https:\/\/www.sciencenews.org\/article\/sterile-neutrino-particle-physics-mystery-microboone\">hypothetical \u201csterile\u201d neutrinos<\/a>\u00a0that wouldn\u2019t interact with matter at all, aside from gravitational forces (<em>SN: 10\/27\/21<\/em>). Dark matter detectors might also spot neutrinos from other sources, such as nearby exploding stars.<\/p><p>\u201cIt\u2019s very cool to see that we can turn this detector into a neutrino observatory,\u201d says physicist Michael Murra of Columbia University, a member of the XENONnT collaboration.<\/p>\n\n\n\n<p>Neutrinos aren\u2019t yet limiting the performance of dark matter detectors. The solar neutrino signal would obscure only low-mass dark matter particles, which fall below the mass range that these detectors scrutinize most carefully for dark matter. There\u2019s still a long way to go before neutrinos start to swamp dark matter detection of higher masses.\u00a0<\/p>\n\n\n\n<p>The next generation of dark matter detector, beyond XENONnT and PandaX-4T, should still be able to search for dark matter. But further improvement will start to become difficult. Instead, scientists could move to detectors that measure the direction of the incoming particles. That would allow researchers to look for dark interactions originating away from the sun, eliminating solar neutrinos from their data.<\/p>\n\n\n\n\t\t\t<\/div>\r\n<br>\r\n<br><a href=\"https:\/\/www.sciencenews.org\/article\/neutrino-fog-dark-matter-experiments\">Source link <\/a>","protected":false},"excerpt":{"rendered":"<p>Take our AI Survey Science News has partnered with Trusting News to gather feedback on the potential use of AI in journalism. Currently, we do not publish any content produced by generative AI (see our policy). We do want to hear your views on how Science News could use AI responsibly. Let us know by [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":101833,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"tdm_status":"","tdm_grid_status":"","fifu_image_url":"https:\/\/i0.wp.com\/www.sciencenews.org\/wp-content\/uploads\/2024\/07\/071924_ev_neutrino_fog_feat.jpg?fit=800%2C450&ssl=1","fifu_image_alt":"","footnotes":""},"categories":[606],"tags":[1866,20958,2121,6776,3682,15141],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/101832"}],"collection":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/comments?post=101832"}],"version-history":[{"count":1,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/101832\/revisions"}],"predecessor-version":[{"id":101834,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/101832\/revisions\/101834"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/media\/101833"}],"wp:attachment":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/media?parent=101832"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/categories?post=101832"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/tags?post=101832"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}