Direct couplings of mimetic dark matter and their cosmological effects

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Liuyuan Shen, Yicen Mou, Yunlong Zheng and Mingzhe Li. Direct couplings of mimetic dark matter and their cosmological effects[J]. Chinese Physics C, 2018, 42(1): 015101. doi: 10.1088/1674-1137/42/1/015101
Liuyuan Shen, Yicen Mou, Yunlong Zheng and Mingzhe Li. Direct couplings of mimetic dark matter and their cosmological effects[J]. Chinese Physics C, 2018, 42(1): 015101.  doi: 10.1088/1674-1137/42/1/015101 shu
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Received: 2017-10-12
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    Supported by NSFC (11422543, 11653002)

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Direct couplings of mimetic dark matter and their cosmological effects

  • 1. Department of Physics, Nanjing University, Nanjing 210093, China
  • 2. Joint Center for Particle, Nuclear Physics and Cosmology, Nanjing 210093, China
  • 3.  Interdisciplinary Center for Theoretical Study, University of Science and Technology of China, Hefei, Anhui 230026, China
Fund Project:  Supported by NSFC (11422543, 11653002)

Abstract: The original mimetic model was proposed to take the role of dark matter. In this paper we consider possible direct interactions of mimetic dark matter with other matter in the universe, especially standard model particles such as baryons and photons. By imposing shift symmetry, the mimetic dark matter field can only have derivative couplings. We discuss the possibilities of generating baryon number asymmetry and cosmic birefringence in the universe based on the derivative couplings of mimetic dark matter to baryons and photons.

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