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Fate of Z 2 symmetric scalar field

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Abstract

The evolution of a coherently oscillating scalar field with Z 2 symmetry is studied in detail. We calculate the dissipation rate of the scalar field based on the closed time path formalism. Consequently, it is shown that the energy density of the coherent oscillation can be efficiently dissipated if the coupling constant is larger than the critical value, even though the scalar particle is stable due to the Z 2 symmetry.

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Authors and Affiliations

  1. Department of Physics, Faculty of Science, University of Tokyo, Bunkyo-ku, Tokyo, 133-0033, Japan

    Kyohei Mukaida, Kazunori Nakayama & Masahiro Takimoto

  2. Kavli Institute for th1e Physics and Mathematics of the Universe, University of Tokyo, Kashiwa, Chiba, 277-8583, Japan

    Kazunori Nakayama

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  1. Kyohei Mukaida
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  2. Kazunori Nakayama
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  3. Masahiro Takimoto
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Correspondence to Kyohei Mukaida.

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ArXiv ePrint: 1308.4394

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Mukaida, K., Nakayama, K. & Takimoto, M. Fate of Z 2 symmetric scalar field. J. High Energ. Phys. 2013, 53 (2013). https://doi.org/10.1007/JHEP12(2013)053

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