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arxiv: 1810.00033 · v2 · pith:7R5V3R67new · submitted 2018-09-28 · ✦ hep-ph · astro-ph.CO

Faint Light from Dark Matter: Classifying and Constraining Dark Matter-Photon Effective Operators

classification ✦ hep-ph astro-ph.CO
keywords operatorsdarkconstraintseffectiveexchangemattermodelphoton
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Even if Dark Matter (DM) is neutral under electromagnetism, it can still interact with the Standard Model (SM) via photon exchange from higher-dimensional operators. Here we classify the general effective operators coupling DM to photons, distinguishing between Dirac/Majorana fermion and complex/real scalar DM. We provide model-independent constraints on these operators from direct and indirect detection. We also constrain various DM-lepton operators, which induce DM-photon interactions via RG running or which typically arise in sensible UV-completions. This provides a simple way to quickly assess constraints on any DM model that interacts mainly via photon exchange or couples to SM leptons.

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