Impact of semi-annihilations on dark matter phenomenology. An example of Z{sub N} symmetric scalar dark matter
- LAPTH, Univ. de Savoie, CNRS, B.P.110, F-74941 Annecy-le-Vieux Cedex (France)
- Scuola Normale Superiore and INFN, Piazza dei Cavalieri 7, 56126 Pisa (Italy)
- Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow 119992 (Russian Federation)
- National Institute of Chemical Physics and Biophysics, Ravala 10, Tallinn (Estonia)
We study the impact of semi-annihilations x{sub i}x{sub j}↔x{sub k}X and dark matter conversion x{sub i}x{sub j}↔x{sub k}x{sub l}, where x{sub i} is any dark matter and X is any standard model particle, on dark matter phenomenology. We formulate minimal scalar dark matter models with an extra doublet and a complex singlet that predict non-trivial dark matter phenomenology with semi-annihilation processes for different discrete Abelian symmetries Z{sub N}, N > 2. We implement two such example models with Z{sub 3} and Z{sub 4} symmetry in micrOMEGAs and work out their phenomenology. We show that both semi-annihilations and dark matter conversion significantly modify the dark matter relic abundance in this type of models. In the Z{sub 4} model, there are two stable neutral particles and therefore multi-component dark matter. We also study the possibility of dark matter direct detection in XENON100 in those models.
- OSTI ID:
- 22279772
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2012, Issue 04; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
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