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Chinese Physics C > 2020, Vol. 44 > Issue(12): 125103 DOI: 10.1088/1674-1137/abb4d5

Observational constraints on dark matter decaying via gravity portals

  • School of Physics and Astronomy, Yunnan University, Kunming 650091, ChinaKey Laboratory of Astroparticle Physics, Yunnan Province, Kunming 650091, China

  • Global symmetry can guarantee the stability of dark matter particles (DMps). However, the nonminimal coupling between dark matter (DM) and gravity can break the global symmetry of DMps, which in turn leads to their decay. Under the framework of nonminimal coupling between scalar singlet dark matter (ssDM) and gravity, it is worth exploring the extent to which the symmetry of ssDM is broken. It is suggested that the total number of decay products of ssDM cannot exceed current observational constraints. Along these lines, the data obtained with satellites such as Fermi-LAT and AMS-02 suggest that the scale of ssDM global symmetry breaking can be limited. Because the mass of many promising DM candidates is likely to be in the GeV-TeV range, we determine reasonable parameters for the ssDM lifetime within this range. We find that when the mass of ssDM is around the electroweak scale (246 GeV), the corresponding 3 $\sigma$ lower limit of the lifetime of ssDM is $5.3\times10^{26}$ s. Our analysis of ssDM around the electroweak scale encompasses the most abundant decay channels of all mass ranges so that the analysis of the behavior of ssDM under the influence of gravity is more comprehensive.
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Xu-Dong Sun and Ben-Zhong Dai. Observational constraints on dark matter decaying via gravity portals[J]. Chinese Physics C. doi: 10.1088/1674-1137/abb4d5
Xu-Dong Sun and Ben-Zhong Dai. Observational constraints on dark matter decaying via gravity portals[J]. Chinese Physics C. doi:10.1088/1674-1137/abb4d5 shu
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Received: 2020-05-13
Revised: 2020-07-22
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    Observational constraints on dark matter decaying via gravity portals

      Corresponding author:Ben-Zhong Dai,bzhdai@ynu.edu.cn
    • School of Physics and Astronomy, Yunnan University, Kunming 650091, ChinaKey Laboratory of Astroparticle Physics, Yunnan Province, Kunming 650091, China
    • Received Date:2020-05-13
    • Accepted Date:2020-07-22
    • Available Online:2020-12-01

      Abstract:Global symmetry can guarantee the stability of dark matter particles (DMps). However, the nonminimal coupling between dark matter (DM) and gravity can break the global symmetry of DMps, which in turn leads to their decay. Under the framework of nonminimal coupling between scalar singlet dark matter (ssDM) and gravity, it is worth exploring the extent to which the symmetry of ssDM is broken. It is suggested that the total number of decay products of ssDM cannot exceed current observational constraints. Along these lines, the data obtained with satellites such as Fermi-LAT and AMS-02 suggest that the scale of ssDM global symmetry breaking can be limited. Because the mass of many promising DM candidates is likely to be in

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