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Minimal dark matter and leptogenesis

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Abstract

A Dirac fermion carrying an integral weak isospin and the vanishing hypercharge is considered as a promising dark matter candidate (called the minimal dark matter) for its mass of order 100 GeV. While the symmetric population of the dark matter annihilates away due to a rapid gauge interaction, its asymmetric abundance is supposed to be produced together with the visible matter asymmetry through leptogenesis by the decay of a right-handed neutrino superfield in the supersymmetric type I seesaw mechanism. The efficiencies for generating the dark matter and lepton asymmetries are calculated by solving a set of approximate Boltzmann equations. A spectacular feature of this scenario is the existence of a long-lived singly-or multiply-charged scalar and a shorter-lived singly-charged fermion whose tracks can be readily looked for at the LHC.

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  1. Korea Institute for Advanced Study, Hoegiro 87, Dongdaemun-gu, Seoul, 130-722, Korea

    Eung Jin Chun

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Chun, E.J. Minimal dark matter and leptogenesis. J. High Energ. Phys. 2011, 98 (2011). https://doi.org/10.1007/JHEP03(2011)098

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