Asymmetric accidental composite dark matter

Salvatore Bottaro (Scuola Normale Superiore, Piazza dei Cavalieri 7, Pisa, 56126, Italy; INFN Sezione di Pisa, Largo B. Pontecorvo 3, Pisa, I-56127, Italy) ; Marco Costa (Scuola Normale Superiore, Piazza dei Cavalieri 7, Pisa, 56126, Italy; INFN Sezione di Pisa, Largo B. Pontecorvo 3, Pisa, I-56127, Italy) ; Oleg Popov (Scuola Normale Superiore, Piazza dei Cavalieri 7, Pisa, 56126, Italy; Department of Physics, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon, 34141, Republic of Korea)

The goal of this work is to find the simplest UV completion of Accidental Composite Dark Matter Models (ACDM) that can dynamically generate an asymmetry for the DM candidate, the lightest dark baryon (DCb), and simultaneously annihilate the symmetric component. In this framework the DCb is a bound state of a confining SU(N)DC gauge group, and can interact weakly with the visible sector. The constituents of the DCb can possess non-trivial charges under the Standard Model gauge group. The generation of asymmetry for such candidate is a two-flavor variation of the out-of-equilibrium decay of a heavy scalar, with mass M ϕ ≳ 1010 GeV. Below the scale of the scalars, the models recover accidental stability, or long-livedness, of the DM candidate. The symmetric component is annihilated by residual confined interactions provided that the mass of the DCb m DCb ≲ 75 TeV. We implement the mechanism of asymmetry generation, or a variation of it, in all the original ACDM models, managing to generate the correct asymmetry for DCb of masses in this range. For some of the models found, the stability of the DM candidate is not spoiled even considering generic GUT completions or asymmetry generation mechanisms in the visible sector.

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      "surname": "Popov", 
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  "abstracts": [
    {
      "source": "Springer", 
      "value": "The goal of this work is to find the simplest UV completion of Accidental Composite Dark Matter Models (ACDM) that can dynamically generate an asymmetry for the DM candidate, the lightest dark baryon (DCb), and simultaneously annihilate the symmetric component. In this framework the DCb is a bound state of a confining SU(N)DC gauge group, and can interact weakly with the visible sector. The constituents of the DCb can possess non-trivial charges under the Standard Model gauge group. The generation of asymmetry for such candidate is a two-flavor variation of the out-of-equilibrium decay of a heavy scalar, with mass M  \u03d5  \u2273 1010 GeV. Below the scale of the scalars, the models recover accidental stability, or long-livedness, of the DM candidate. The symmetric component is annihilated by residual confined interactions provided that the mass of the DCb m DCb \u2272 75 TeV. We implement the mechanism of asymmetry generation, or a variation of it, in all the original ACDM models, managing to generate the correct asymmetry for DCb of masses in this range. For some of the models found, the stability of the DM candidate is not spoiled even considering generic GUT completions or asymmetry generation mechanisms in the visible sector."
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Published on:
09 November 2021
Publisher:
Springer
Published in:
Journal of High Energy Physics , Volume 2021 (2021)
Issue 11
Pages 1-50
DOI:
https://doi.org/10.1007/JHEP11(2021)055
arXiv:
2104.14244
Copyrights:
The Author(s)
Licence:
CC-BY-4.0

Fulltext files: