Both neutrinoless double beta decay and leptogenesis require neutrinos to be Majorana fermions. A relation between these two phenomena can derived once the mechanism of neutrino mass generation is specified. We first derive constraints on phases by minimising effective in with respect smallest among light neutrinos. Given phases, we a lower bound $M_{1}$ (the lightest heavy neutrinos) framework...

The QCD one-loop renormalization is restudied in a mass-dependent subtraction scheme in which the quark mass is not set to vanish and the renormalization point is chosen to be an arbitrary timelike momentum. The correctness of the subtraction is ensured by the Ward identities which are respected in all the processes of subtraction. By considering the mass effect, the effective coupling constant...

X iv :n uc lth /0 00 80 18 v1 1 0 A ug 2 00 0 A relation among the effective nucleon mass, the incompressibility and the effective σ-meson mass in nuclear matter Yoshitaka Iwasaki, Hiroaki Kouno, Akira Hasegawa and Masahiro Nakano Department of Physics, Saga University Saga 840, Japan *University of Occupational and Environmental Health, Kitakyushu 807, Japan Abstract A relation among the effec...