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Chinese Physics C > 2020, Vol. 44 > Issue(8): 085001 DOI: 10.1088/1674-1137/44/8/085001

Expected LHAASO sensitivity to decaying dark matter signatures from dwarf galaxies gamma-ray emission

  • 1.

    Department of Physics, College of Sciences, Northeastern University, Shenyang 110819, China

  • 2.

    Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

  • 3.

    School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

  • 4.

    Center for High Energy Physics, Peking University, Beijing 100080, China

  • As a next-generation complex extensive air shower array with a large field of view, the large high altitude air shower observatory (LHAASO) is very sensitive to the very-high-energy gamma rays from ~300 GeV to 1 PeV and may thus serve as an important probe for the heavy dark matter (DM) particles. In this study, we make a forecast for the LHAASO sensitivities to the gamma-ray signatures resulting from DM decay in dwarf spheroidal satellite galaxies (dSphs) within the LHAASO field of view. Both individual and combined limits for 19 dSphs incorporating the uncertainties of the DM density profile are explored. Owing to the large effective area and strong capability of the photon-proton discrimination, we find that LHASSSO is sensitive to the signatures from decaying DM particles above ${\cal{O}}(1)$ TeV. The LHAASO sensitivity to the DM decay lifetime reaches ${\cal{O}} (10^{26}) \sim {\cal{O}} (10^{28})$ s for several decay channels at the DM mass scale from 1 TeV to 100 TeV.
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Dong-Ze He, Xiao-Jun Bi, Su-Jie Lin, Peng-Fei Yin and Xin Zhang. Expectation on LHAASO sensitivity to decaying dark matter signatures from dwarf galaxies gamma-ray emission[J]. Chinese Physics C. doi: 10.1088/1674-1137/44/8/085001
Dong-Ze He, Xiao-Jun Bi, Su-Jie Lin, Peng-Fei Yin and Xin Zhang. Expectation on LHAASO sensitivity to decaying dark matter signatures from dwarf galaxies gamma-ray emission[J]. Chinese Physics C. doi:10.1088/1674-1137/44/8/085001 shu
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Received: 2019-10-22
Revised: 2020-03-07
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    Expected LHAASO sensitivity to decaying dark matter signatures from dwarf galaxies gamma-ray emission

      Corresponding author:Su-Jie Lin,linsj@ihep.ac.cn
      Corresponding author:Xin Zhang,zhangxin@mail.neu.edu.cn
    • 1. Department of Physics, College of Sciences, Northeastern University, Shenyang 110819, China
    • 2. Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
    • 3. School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
    • 4. Center for High Energy Physics, Peking University, Beijing 100080, China
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