# Dark matter, mu problem and neutrino mass with gauged R-symmetry - High Energy Physics - Phenomenology

Dark matter, mu problem and neutrino mass with gauged R-symmetry - High Energy Physics - Phenomenology - Download this document for free, or read online. Document in PDF available to download.

Abstract: We show that the mu problem and the strong CP problem can be resolved in thecontext of the gauged U1 R symmetry, realizing an automatic Peccei-Quinnsymmetry. In this scheme, right-handed neutrinos can be introduced to explainsmall Majorana or Dirac neutrino mass. The U1 R D-term mediated SUSYbreaking, called the U1 R mediation, gives rise to a specific form of theflavor-conserving superpartner masses. For the given solution to the muproblem, electroweak symmetry breaking condition requires the superpartners ofthe Standard Model at low energy to be much heavier than the gravitino. Thusdark matter candidate can be either gravitino or right-handed sneutrino. In theMajorana neutrino case, only gravitino is a natural dark matter candidate. Onthe other hand, in the Dirac neutrino case, the right-handed sneutrino can bealso a dark matter candidate as it gets mass only from SUSY breaking. Wediscuss the non-thermal production of our dark matter candidates from the latedecay of stau and find that the constraints from the Big Bang Nucleosynthesiscan be evaded for a TeV-scale stau mass.

Author: ** Ki-Young Choi, Eung Jin Chun, Hyun Min Lee**

Source: https://arxiv.org/