3.5 keV X-ray line and R-parity conserving supersymmetry
- Dutta, BhaskarMitchell Institute of Fundamental Physics and Astronomy, Department of Physics and Astronomy, Texas A&M University, College Station, TX, 77843-4242, U.S.A.
- Gogoladze, Ilia(Bartol Research Institute, Department of Physics and Astronomy, University of Delaware, Newark, DE, 19716, U.S.A.)
- Khalid, Rizwan(Department of Physics, School of Natural Sciences, National University of Sciences & Technology, H-12, Islamabad, Pakistan)
- Shafi, Qaisar(Bartol Research Institute, Department of Physics and Astronomy, University of Delaware, Newark, DE, 19716, U.S.A.)
DOIAbstract
We present some R-parity conserving supersymmetric models which can accommodate the 3.5 keV X-ray line reported in recent spectral studies of the Perseus galaxy cluster and the Andromeda galaxy. Within the Minimal Supersymmetric Standard Model (MSSM) framework, the dark matter (DM) gravitino (or the axino) with mass of around 7 keV decays into a massless neutralino (bino) and a photon with lifetime ∼ 10 28 sec. The massless bino contributes to the effective number of neutrino species N eff and future data will test this prediction. In the context of NMSSM, we first consider scenarios where the bino is massless and the singlino mass is around 7 keV. We also consider quasi-degenerate bino-singlino scenarios where the mass scale of DM particle...
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