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Light dark matter and Z′ dark force at colliders

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Abstract

Light DM, < 10 GeV, with sizeable direct detection rate is an interesting and less explored scenario. Collider searches can be very powerful, such as through the channel in which a pair of dark matter particle is produced in association with a jet. It is a generic possibility that the mediator of the interaction between dark matter and the nucleus will also be accessible at the Tevatron and the LHC. Therefore, collider search of the mediator can provide a more comprehensive probe of the dark matter and its interactions. In this article, to demonstrate the complementarity of these two approaches, we focus on the possibility of the mediator being a new U(1)′ gauge boson, which is probably the simplest model which allows a large direct detection cross section for a light dark matter candidate. We combine searches in the monojet + MET channel and dijet resonance search for the mediator. We find that for the mass of Z′ between 250 GeV and 4 TeV, resonance searches at the colliders provide stronger constraints on this model than the monojet + MET searches.

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Authors and Affiliations

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

    Haipeng An & Xiangdong Ji

  2. Perimeter Institute, Waterloo, Ontario, N2L 2Y5, Canada

    Haipeng An

  3. INPAC, and Department of Physics, Shanghai Jiao Tong University, Shanghai, 200240, China

    Xiangdong Ji

  4. Center for High-Energy Physics and Institute of Theoretical Physics, Peking University, Beijing, 100871, China

    Xiangdong Ji

  5. Enrico Fermi Institute and Department of Physics, University of Chicago, Chicago, IL, 60637, U.S.A.

    Lian-Tao Wang

  6. Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL, 60637, U.S.A.

    Lian-Tao Wang

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  1. Haipeng An
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An, H., Ji, X. & Wang, LT. Light dark matter and Z′ dark force at colliders. J. High Energ. Phys. 2012, 182 (2012). https://doi.org/10.1007/JHEP07(2012)182

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