Gamma-ray Constraints on Effective Interactions of the Dark Matter

Details Gamma-ray Constraints on Effective Interactions of the Dark Matter Gamma-ray Constraints on Effective Interactions of the Dark Matter

2011-04-28

arxiv.org/abs/1104.5329v2

JCAP 1106:023,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 4 figures; title fixed and a couple of references added

Scientific paper

10.1088/1475-7516/2011/06/023

Using an effective interaction approach to describe the interactions between the dark matter particle and the light degrees of freedom of the standard model, we calculate the gamma-ray flux due to the annihilation of the dark matter into quarks, followed by fragmentation into neutral pions which subsequently decay into photons. By comparison to the mid-latitude data released from the Fermi-LAT experiment, we obtain useful constraints on the size of the effective interactions and they are found to be comparable to those deduced from collider, gamma-ray line and anti-matter search experiments. However, the two operators induced by scalar and vector exchange among fermionic dark matter and light quarks that contribute to spin-independent cross sections are constrained more stringently by the recent XENON100 data.

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