$\mu$-term as the origin of lepton number asymmetry
Daijiro Suematsu · arXiv (Cornell University) · 2002
We study a possibility to combine an origin of the $\\mu$-term and the lepton number asymmetry. If we assume that the $\\mu$-term is generated by a vacuum expectation value of a standard model singlet scalar field at an intermediate scale, the decay of its oscillation caused by the deviation from the true vacuum can produce Higgsino asymmetry. In the model with a bilinear $ R$-parity violation this asymmetry may be successfully converted into the baryon number asymmetry due to the sphaleron interaction. We examine this possibility combining it with the scale of the $\\mu$-term and neutrino masses.