8 papers · 1 filter
CP violation in tau decays
Daiji Kimura, Kang Young Lee, Takuya Morozumi +1
CP violation of the charged lepton sector has not been found yet. Tau is a unique charged lepton which can decay into hadrons. In this talk, we argue what kind of new physics can b…
CP violation of tau -> K pi(eta, eta') nu decays
Daiji Kimura, Kang Young Lee, T. Morozumi +1
We study direct CP violation of tau -> K pi(eta,eta')nu decays. By studying the forward and backward asymmetry, the interference of L=0 and L=1 amplitudes of the hadronic system ca…
Mass eigenstates and mass eigenvalues of seesaw
Takuya Morozumi
The light neutrino mass spectrum and mixing matrix of seesaw model including three right-handed neutrinos are studied for the most general case. An approximate formulae for mass ei…
Low scale Seesaw model and Lepton Flavor Violating Rare B Decays
T. Fujihara, S. K. Kang, C. S. Kim +2
We study lepton flavor number violating rare B decays, , in a seesaw model with low scale singlet Majorana neutrinos motivated by the resonant leptogen…
A New Mechanism For Baryogenesis Living Through Electroweak Era
Hyung Do Kim, Jihn E. Kim, Takuya Morozumi
We present a new mechanism for baryogenesis by introducing a heavy vector-like SU(2)_W singlet quark(s) with Q_{em}=2/3 quark U or Q_{em}=-1/3 quark D. The lifetime of the heavy qu…
B-> X_sl^+l^- and B->Kπdecays in vectorlike quark model
T. Morozumi, Z. Xiong, T. Yoshikawa
In the framework of SU(2) singlet down type vectorlike quark model, we present a comprehensive analysis for decays B-> X_s γ, B->X_sl^+l^- and B-> Kπ. As for B-> X_sγ, we include t…