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Analysis of the parameter space and spectrum of the $\mu \nu$SSM.

AutorEscudero, Nicolás; López-Fogliani, Daniel E.; Muñoz, Carlos ; Ruiz de Austri, Roberto
Palabras claveSupersymmetry Phenomenology
Fecha de publicación22-dic-2008
EditorInstitute of Physics Publishing
International School for Advanced Studies
CitaciónJournal of High Energy Physics 12(099): (2008)
ResumenThe μνSSM is a supersymmetric standard model that solves the μ problem of the MSSM using the R-parity breaking couplings between the right-handed neutrino superfields and the Higgses in the superpotential, λi hat nucihat Hdhat Hu. The μ term is generated spontaneously through sneutrino vacuum expectation values, μ = λilangletilde nucirangle, once the electroweak symmetry is broken. In addition, the couplings κijkhat nucihat nucjhat nuck forbid a global U(1) symmetry avoiding the existence of a Goldstone boson, and also contribute to spontaneously generate Majorana masses for neutrinos at the electroweak scale. Following this proposal, we have analysed in detail the parameter space of the μνSSM. In particular, we have studied viable regions avoiding false minima and tachyons, as well as fulfilling the Landau pole constraint. We have also computed the associated spectrum, paying special attention to the mass of the lightest Higgs. The presence of right and left-handed sneutrino vacuum expectation values leads to a peculiar structure for the mass matrices. The most important consequence is that neutralinos are mixed with neutrinos, and neutral Higgses with sneutrinos.
Descripción40 pages, 12 figures.-- Pre-print archive.
Versión del editorhttp://dx.doi.org/10.1088/1126-6708/2008/12/099
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