@article{oai:kanazawa-u.repo.nii.ac.jp:00058377, author = {末松, 大二郎 and Suematsu, Daijiro and Toma, Takashi and Yoshida, Tetsuro}, issue = {9}, journal = {Physical Review D - Particles, Fields, Gravitation and Cosmology}, month = {May}, note = {We reexamine relic abundance of a singlet fermion as a cold dark matter candidate, which contributes to the neutrino mass generation through radiative seesaw mechanism. We search solutions for Yukawa couplings and the mass spectrum of relevant fields to explain neutrino oscillation data. For such solutions, we show that an abundance of a lightest singlet fermion can be consistent with WMAP data without conflicting with both bounds of μ→eγ and τ→μγ. This reconciliation does not need any modification of the original radiative seesaw model other than by specifying flavor structure of Yukawa couplings and taking account of coannihilation effects. © 2009 The American Physical Society., 金沢大学理工研究域数物科学系}, title = {Reconciliation of CDM abundance and μ→eγ in a radiative seesaw model}, volume = {79}, year = {2009} }