Scalar neutrino dark matter in U(1)XSSM

Abstract

U(1) X SSM is the extension of the minimal supersymmetric standard model (MSSM) and its local gauge group is SU(3) C × SU(2) L × U(1) Y × U(1) X . To obtain this model, three singlet new Higgs superfields and right-handed neutrinos are added to MSSM. In the framework of U(1) X SSM, we study the Higgs mass and take the lightest CP-even sneutrino as a cold dark matter candidate. For the lightest CP-even sneutrino, the relic density and the cross section for dark matter scattering off nucleon are both researched. In suitable parameter space of the model, the numerical results satisfy the constraints of the relic density and the cross section with the nucleon.

Scalar neutrino dark matter in BLMSSM

“…To confine the used parameter, we take into account the experiment results from the Particle Data Group(PDG) [38]. The results from our previous works are also considered [39]. About the mass of the lightest neutral CP-even Higgs h 0 , we set its value as m h 0 =125.1…”

Lepton flavor violating decays τ → Pl in the U(1)XSSM model

“…The particle content and charge assignments for U(1) X SSM are shown in the table 1. In our previous work, we have proven that U(1) X SSM is anomaly free [23]. Different from JHEP04(2022)122 MSSM, U(1) X SSM has a new effect called as the gauge kinetic mixing, which is produced from two Abelian groups U(1) Y and U(1) X .…”

“…As the U(1) extension of MSSM, the local gauge group of U(1) X SSM is SU(3) C ⊗ SU(2) L ⊗ U(1) Y ⊗U(1) X [22][23][24]. U(1) X SSM has new superfields such as three Higgs singlets η, η, Ŝ and right-handed neutrinos νi , which are beyond MSSM.…”

“…A, B, C, D are coupling constants of the corresponding vertexes, whose concrete forms can be found in refs. [23,24,31].…”

B 0— B¯0 mixing in the U(1) X SSM

“…In order to obtain Higgs boson mass of 125.1 GeV, it is necessary to consider loop correction [28][29][30]. The particle content and charge distribution of U(1) X SSM can be found in previous study [31].…”