Two-loop Dirac neutrino mass and WIMP dark matter

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• 作者：Cesar Bonilla^a ; ^{cesar.bonilla@ific.uv.es" class="auth_mail" title="E-mail the corresponding author} ; Ernest Ma^b ; ^{ma@phyun8.ucr.edu" class="auth_mail" title="E-mail the corresponding author} ; Eduardo Peinado^c ; ^{epeinado@fisica.unam.mx" class="auth_mail" title="E-mail the corresponding author} ; Jose W.F. Valle^a ; ^{valle@ific.uv.es" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Neutrino masses and mixing ; Dark matter stability
• 刊名：Physics Letters B
• 出版年：2016
• 出版时间：10 November 2016
• 年：2016
• 卷：762
• 期：Complete
• 页码：214-218
• 全文大小：304 K

文摘

We propose a “scotogenic” mechanism relating small neutrino mass and cosmological dark matter. Neutrinos are Dirac fermions with masses arising only in two-loop order through the sector responsible for dark matter. Two triality symmetries ensure both dark matter stability and strict lepton number conservation at higher orders. A global spontaneously broken U(1) symmetry leads to a physical Diracon   that induces invisible Higgs decays which add up to the Higgs to dark matter mode. This enhances sensitivities to spin-independent WIMP dark matter search below class="mathmlsrc">class="formulatext stixSupport mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S0370269316305214&_mathId=si1.gif&_user=111111111&_pii=S0370269316305214&_rdoc=1&_issn=03702693&md5=057ab581da1769036e8a7078c35e0289" title="Click to view the MathML source">m_h/2class="mathContainer hidden">class="mathCode">$m_h/2$.