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arXiv · 1206.2639

A 130 GeV photon line from dark matter annihilation in the NMSSM

Debottam Das·Ulrich Ellwanger·Pantelis Mitropoulos
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Abstract

In the Next-to-Minimal Supersymmetric Standard Model, neutralino dark matter can annihilate into a pair of photons through the exchange of a CP-odd Higgs boson in the s-channel. The CP-odd Higgs boson couples to two photons through a loop of dominantly higgsino-like charginos. We show that the parameter space of the NMSSM can accommodate simultaneously i) neutralino-like dark matter of a mass of about 130 GeV giving rise to a 130 GeV photon line; ii) an annihilation cross section of or larger than 10^{-27}cm^3s^{-1}; iii) a relic density in agreement with WMAP constraints; iv) a direct detection cross section compatible with bounds from XENON100, and v) a Standard Model like Higgs mass of about 125 GeV. However, the CP-odd Higgs mass has to lie accidentally close to 260 GeV.

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Debottam Das, Ulrich Ellwanger, Pantelis Mitropoulos. 2012-08-23. A 130 GeV photon line from dark matter annihilation in the NMSSM. https://doi.org/10.1088/1475-7516%2F2012%2F08%2F003

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