Sampling the μνSSM in the light of experimental data

December 10, 2019
12:00pm to 2:00pm

IFT Seminar Room/Red Room

Specialist level
Essodjolo Kpatcha

IFT Seminar Room/Red Room


In this thesis, we consider the “μ from ν” Supersymmetric Standard Model (μνSSM) as the theoretical model to be analyzed. In addition to the usual advantages of SUSY models, the μνSSM, through the presence of three families of right-handed neutrino superfields can simultaneously solve the μ-problem of the Minimal Supersymmetric Standard Model (MSSM), as well as the ν-problem, being able to reproduce the correct neutrino masses and mixing angles. It can also provide a good candidate for DM, the gravitino. In this context, we thoroughly study the parameter space of the μνSSM in the light of current experimental data, using a powerful likelihood data-driven method. In particular, we study the viable regions of the parameter space compatible with current neutrino oscillations and Higgs data, as well as a class of flavor observables. On the one hand, we analyze those regions that can be explored at the current and future runs of the LHC via the extended Higgs sector of the μνSSM which in general consists of two Higgs doublets mixed with the three families of sneutrinos. Then, we apply this strategy to study the compatibility of the left sneutrino as an interesting LSP candidate in the μνSSM with current displaced dilepton searches. On the other hand, we also analyze the regions that can explain a long standing puzzle of the Standard Model, namely, the deviation of the measurement of the anomalous magnetic moment of the muon with respect to the theoretical prediction