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arXiv · 1801.05821

Thermal dark matter co-annihilating with a strongly interacting scalar

S. Biondini·M. Laine
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Abstract

Recently many investigations have considered Majorana dark matter co-annihilating with bound states formed by a strongly interacting scalar field. However only the gluon radiation contribution to bound state formation and dissociation, which at high temperatures is subleading to soft 2->2 scatterings, has been included. Making use of a non-relativistic effective theory framework and solving a plasma-modified Schrodinger equation, we address the effect of soft 2->2 scatterings as well as the thermal dissociation of bound states. We argue that the mass splitting between the Majorana and scalar field has in general both a lower and an upper bound, and that the dark matter mass scale can be pushed at least up to 5...6 TeV.

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S. Biondini, M. Laine. 2018-05-03. Thermal dark matter co-annihilating with a strongly interacting scalar. https://doi.org/10.1007/jhep04(2018)072

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