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Phenomenology of light sneutrino dark matter in cMSSM/mSUGRA with inverse seesaw

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Abstract

We study the possibility of a light Dark Matter (DM) within a constrained Minimal Supersymmetric Standard Model (cMSSM) framework augmented by a SM singlet-pair sector to account for the non-zero neutrino masses by inverse seesaw mechanism. Working within a ‘hybrid’ scenario with the MSSM sector fixed at high scale and the singlet neutrino sector at low scale, we find that, contrary to the case of the usual cMSSM where the neutralino DM cannot be very light, we can have a light sneutrino DM with mass below 100 GeV satisfying all the current experimental constraints from cosmology, collider as well as low-energy experiments. We also note that the supersymmetric inverse seesaw mechanism with sneutrino as the lightest supersymmetric partner can have enhanced same-sign dilepton final states with large coming from the gluino- and squark-pair as well as the squark-gluino associated productions and their cascade decay through charginos. We present a collider study for the same-sign dilepton + jets+ signal in this scenario and propose some distinctions with the usual cMSSM. We also comment on the implications of such a light DM scenario on the invisible decay width of an 125 GeV Higgs boson.

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Authors and Affiliations

  1. Maryland Center for Fundamental Physics, Department of Physics, University of Maryland, College Park, MD, 20742, U.S.A

    P. S. Bhupal Dev

  2. Consortium for Fundamental Physics, School of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, U.K

    P. S. Bhupal Dev

  3. Department of Theoretical Physics, Indian Association for the Cultivation of Science, 2A & 2B Raja S.C. Mullick Road, Kolkata, 700032, India

    Subhadeep Mondal & Sourov Roy

  4. Regional Centre for Accelerator-based Particle Physics, Harish-Chandra Research Institute, Chhatnag Road, Jhusi, Allahabad, 211019, India

    Biswarup Mukhopadhyaya

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  1. P. S. Bhupal Dev
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  2. Subhadeep Mondal
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  3. Biswarup Mukhopadhyaya
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  4. Sourov Roy
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Dev, P.S.B., Mondal, S., Mukhopadhyaya, B. et al. Phenomenology of light sneutrino dark matter in cMSSM/mSUGRA with inverse seesaw. J. High Energ. Phys. 2012, 110 (2012). https://doi.org/10.1007/JHEP09(2012)110

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