Two-loop snail diagrams: relating neutrino masses to dark matter
نویسندگان
چکیده
منابع مشابه
Decaying majoron dark matter and neutrino masses
We review the recent proposal by Lattanzi & Valle of the majoron as a suitable warm dark matter candidate. The majoron is the Goldstone boson associated to the spontaneous breaking of ungauged lepton number, one of the mechanisms proposed to give rise to neutrino masses. The majoron can acquire a mass through quantum gravity effects, and can possibly account for the observed dark matter compone...
متن کاملDecaying warm dark matter and neutrino masses.
Neutrino masses may arise from spontaneous breaking of ungauged lepton number. Because of quantum gravity effects the associated Goldstone boson - the majoron - will pick up a mass. We determine the lifetime and mass required by cosmic microwave background observations so that the massive majoron provides the observed dark matter of the Universe. The majoron decaying dark matter scenario fits n...
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Dark matter is usually distinguished from ordinary matter by an odd-even parity, i.e. the discrete symmetry Z 2. The new idea of Z 3 dark matter is proposed with a special application to generating radiative Majorana neutrino masses in two-loop order.
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We obtain model independent relations among neutrino masses and leptogenesis parameters. We find exact relations that involve the CP asymmetries ǫNα , the washout parameters m̃α and θαβ, and the neutrino masses mi and Mα, as well as powerful inequalities that involve just m̃α and mi. We prove that the Yukawa interactions of at least two of the heavy singlet neutrinos are in the strong washout reg...
متن کاملTwo-loop neutrino masses and the solar neutrino problem.
The addition of m singlet right-handed neutrinos to the Standard Model leads to radiatively generated mass corrections for the SU(2)L doublet neutrinos. For those neutrinos which are massless at the tree level after this addition, this implies a small mass generated at the two-loop level via W exchange. We calculate these mass corrections exactly by obtaining an analytic form for the general ca...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2015
ISSN: 1029-8479
DOI: 10.1007/jhep05(2015)029