{"id":3925264,"date":"2026-04-02T11:04:01","date_gmt":"2026-04-02T16:04:01","guid":{"rendered":"http:\/\/mikedyess.info\/para\/gravity-from-positivity-single-massive-spin-3-2-particle-makes-gravity-logically-inevitable-study-claims\/"},"modified":"2026-04-02T11:04:01","modified_gmt":"2026-04-02T16:04:01","slug":"gravity-from-positivity-single-massive-spin-3-2-particle-makes-gravity-logically-inevitable-study-claims","status":"publish","type":"post","link":"http:\/\/mikedyess.info\/para\/gravity-from-positivity-single-massive-spin-3-2-particle-makes-gravity-logically-inevitable-study-claims\/","title":{"rendered":"Gravity from positivity: Single massive spin-3\/2 particle makes gravity logically inevitable, study claims"},"content":{"rendered":"<div>Researchers at IPhT (CEA, CNRS) and the Universitat Aut\u00f2noma de Barcelona have shown that gravity\u2014and with it, supersymmetry\u2014emerge as logical necessities whenever a massive spin-3\/2 particle exists in nature. Two principles are enough: causality, the fact that no signal can travel faster than light, and unitarity, the requirement that probabilities are conserved in quantum mechanics. The structure of supergravity is not assumed: it bootstraps itself.<\/div>\n<p><a target=\"_blank\" href=\"https:\/\/phys.org\/news\/2026-04-gravity-positivity-massive-particle-logically.html\" target=\"_blank\">Go to Source<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Researchers at IPhT (CEA, CNRS) and the Universitat Aut\u00f2noma de Barcelona have shown that gravity\u2014and with it, supersymmetry\u2014emerge as logical necessities whenever a massive spin-3\/2 particle exists in nature. Two principles are enough: causality, the fact that no signal can travel faster than light, and unitarity, the requirement that probabilities are conserved in quantum mechanics. [&#8230;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35],"tags":[],"class_list":["post-3925264","post","type-post","status-publish","format-standard","hentry","category-latest-in-physics","odd"],"_links":{"self":[{"href":"http:\/\/mikedyess.info\/para\/wp-json\/wp\/v2\/posts\/3925264","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/mikedyess.info\/para\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/mikedyess.info\/para\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/mikedyess.info\/para\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/mikedyess.info\/para\/wp-json\/wp\/v2\/comments?post=3925264"}],"version-history":[{"count":0,"href":"http:\/\/mikedyess.info\/para\/wp-json\/wp\/v2\/posts\/3925264\/revisions"}],"wp:attachment":[{"href":"http:\/\/mikedyess.info\/para\/wp-json\/wp\/v2\/media?parent=3925264"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/mikedyess.info\/para\/wp-json\/wp\/v2\/categories?post=3925264"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/mikedyess.info\/para\/wp-json\/wp\/v2\/tags?post=3925264"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}