TY - JOUR
T1 - Leptogenesis with composite neutrinos
AU - Grossman, Yuval
AU - Tsai, Yuhsin
PY - 2008
Y1 - 2008
N2 - Models with composite singlet neutrinos can give small Majorana or Dirac masses to the active neutrinos. The mechanism is based on the fact that conserved chiral symmetries give massless neutrinos at the renormalizable level. Thus, they acquire very small masses due to non-renormalizable terms. We investigate such models in two aspects. First, we find UV completions for them and then we investigate the possibility of giving leptogenesis. We find that these models offer new possibilities for leptogenesis. Models with Majorana masses can exhibit standard leptogenesis. Models with Dirac masses can provide a realization of Dirac type leptogenesis with mass scale that can be as low as 10TeV.
AB - Models with composite singlet neutrinos can give small Majorana or Dirac masses to the active neutrinos. The mechanism is based on the fact that conserved chiral symmetries give massless neutrinos at the renormalizable level. Thus, they acquire very small masses due to non-renormalizable terms. We investigate such models in two aspects. First, we find UV completions for them and then we investigate the possibility of giving leptogenesis. We find that these models offer new possibilities for leptogenesis. Models with Majorana masses can exhibit standard leptogenesis. Models with Dirac masses can provide a realization of Dirac type leptogenesis with mass scale that can be as low as 10TeV.
KW - Neutrino physics
KW - Technicolor and composite models.
UR - http://www.scopus.com/inward/record.url?scp=62649085015&partnerID=8YFLogxK
U2 - 10.1088/1126-6708/2008/12/016
DO - 10.1088/1126-6708/2008/12/016
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AN - SCOPUS:62649085015
SN - 1126-6708
VL - 2008
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 12
M1 - 016
ER -