We propose a Dirac neutrino portal dark matter scenario by minimally extending the particle content of the Standard Model with three right-handed neutrinos , a Dirac fermion dark matter candidate (\u03c8) and a complex scalar (\u03c6), all of which are singlets under the SM gauge group. An additional symmetry has been introduced for the stability of dark matter candidate \u03c8 and also ensuring the Dirac nature of light neutrinos at the same time. In this scenario, we can have thermal or non-thermal dark matter depending upon couplings involving these particles. Most importantly, one can easily correlate the cosmological evolution of dark matter with the dynamics of right-handed neutrinos. This leads to a strong constraint on dark matter parameter space from the measurement of the effective number of relativistic degrees of freedom by Planck. The next generation experiments like CMB-S4, SPT-3G etc. will have the required sensitivities to probe a major portion of the entire model parameter space, offering a promising way of probing such light dark matter, where the traditional direct detection experiments are still not sensitive enough.<\/p>\n","protected":false},"excerpt":{"rendered":"
We propose a Dirac neutrino portal dark matter scenario by minimally extending the particle content of the Standard Model with three right-handed neutrinos , a Dirac fermion dark matter candidate (\u03c8) and a complex scalar (\u03c6), all of which are singlets under the SM gauge group…<\/p>\n","protected":false},"featured_media":2748,"template":"","categories":[107],"tags":[],"class_list":["post-2747","event","type-event","status-publish","has-post-thumbnail","hentry","category-past-short-term-event"],"acf":[],"_links":{"self":[{"href":"http:\/\/192.168.143.208\/pamu\/wp-json\/wp\/v2\/event\/2747","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/192.168.143.208\/pamu\/wp-json\/wp\/v2\/event"}],"about":[{"href":"http:\/\/192.168.143.208\/pamu\/wp-json\/wp\/v2\/types\/event"}],"version-history":[{"count":0,"href":"http:\/\/192.168.143.208\/pamu\/wp-json\/wp\/v2\/event\/2747\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/192.168.143.208\/pamu\/wp-json\/wp\/v2\/media\/2748"}],"wp:attachment":[{"href":"http:\/\/192.168.143.208\/pamu\/wp-json\/wp\/v2\/media?parent=2747"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/192.168.143.208\/pamu\/wp-json\/wp\/v2\/categories?post=2747"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/192.168.143.208\/pamu\/wp-json\/wp\/v2\/tags?post=2747"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}