Some phenomenological studies of a U(1)R — lepton number model with a right handed neutrino

IWTCP-2; NCTP-39

Chakraborty, Sabyasachi^1

Department of Theoretical Physics, Indian Association for the Cultivation of Science, 2A and 2B Raja S. C. Mullick Road, Jadavpur, Kolkata

700 032, India^1

关键词: Dirac neutrino;    Lepton number;    Neutrino dark matter;    Neutrino mass;    Right-handed neutrinos;    Supersymmetric models;    The standard model;    Yukawa couplings;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/627/1/012008/pdf
DOI  :  10.1088/1742-6596/627/1/012008

来源: IOP

【 摘 要 】

We discuss the Higgs sector and neutrino mass and mixing in the context of a supersymmetric model with a U(1)Rsymmetry augmented by a single right handed neutrino superfield. The lepton number of the standard model fermions are identified with the negative of their R-charges. The presence of the neutrino Yukawa coupling (f) plays a very interesting role in Dirac neutrino mass generation as well as providing a tree level correction to the Higgs boson mass, when f ∼ O(1). In order to fit the complete neutrino mass and mixing, a small breaking of the U(1)Rsymmetry is considered in the context of anomaly mediated supersymmetry breaking. We also show that when f ∼ 10-4, the right handed neutrino can be identified with a 7 keVsterile neutrino dark matter as recent studies have speculated.