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arXiv · 1205.5789

Mixed Wino-Axion Dark Matter in String/M Theory and the 130 GeV Gamma-line "Signal"

Bobby Samir Acharya·Gordon Kane·Piyush Kumar·Ran Lu·Bob Zheng
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Abstract

String/M theory compactifications with low energy supersymmetry tend to predict that dark matter has two components: axions and WIMPs \cite{1004.5138,1204.2795}. In accord with this, we show that the tentative 130 GeV gamma-line signal reported in \cite{1204.2797} can be interpreted as arising from the annihilation of 145 GeV mass, Wino-like WIMPs into a Z-boson and a photon. In this context, the signal implies a second component of dark matter which we interpret as being composed of axions - the relative Wino/Axion abundances being approximately equal. Further predictions are implied: signals in both diffuse and monochromatic photons from dwarf spheroidal galaxies; monochromatic photons with energy 145 GeV; for the LHC, the Higgs boson mass has been predicted in this framework \cite{1112.1059}, and the current Higgs limits provide interesting constraints on the mass of the Gluino.

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Bobby Samir Acharya, Gordon Kane, Piyush Kumar, Ran Lu, Bob Zheng. 2012-05-25. Mixed Wino-Axion Dark Matter in String/M Theory and the 130 GeV Gamma-line "Signal". https://arxiv.org/abs/1205.5789

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