Analysis of the parameter space and spectrum of the $μν$SSM

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dc.creatorEscudero, Nicolas
dc.creatorLopez-Fogliani, Daniel E.
dc.creatorMunoz, Carlos
dc.creatorde Austri, Roberto Ruiz
dc.date2008-10-08
dc.date2008-12-04
dc.date.accessioned2026-07-07T12:30:23Z
dc.date.available2026-07-07T12:30:23Z
dc.descriptionThe $μν$SSM 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, $λ_{i} \hat ν^c_i \hat H_d \hat H_u$. The $μ$ term is generated spontaneously through sneutrino vacuum expectation values, $μ=λ_i < \tilde ν^c_i>$, once the electroweak symmetry is broken. In addition, the couplings $κ_{ijk} \hat ν^c_i\hat ν^c_j\hat ν^c_k$ 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 $μν$SSM. 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.
dc.descriptionFinal version accepted in JHEP. 38 pages, 12 figures
dc.identifierhttps://arxiv.org/abs/0810.1507
dc.identifierhttp://arxiv.org/abs/0810.1507
dc.identifierJHEP 0812:099,2008
dc.identifierdoi:10.1088/1126-6708/2008/12/099
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/216117
dc.subjectHigh Energy Physics - Phenomenology
dc.titleAnalysis of the parameter space and spectrum of the $μν$SSM
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