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In flavored dark matter models, dark matter can scatter off of nuclei throughHiggs and photon exchange, both of which can arise from renormalizableinteractions and individually lead to strong constraints from direct detection.While these two interaction channels can destructively interfere in thescattering amplitude, for a thermal relic with equal abundances for the darkmatter particle and its antiparticle, this produces no effect on the totalevent rate. Focusing on lepton-flavored dark matter, we show that it is quitenatural for dark matter to have become asymmetric during high-scaleleptogenesis, and that in this case the direct detection bounds can besignificantly weakened due to interference. We quantify this by mapping out andcomparing the regions of parameter space that are excluded by direct detectionfor the symmetric and asymmetric cases of lepton-flavored dark matter. Inparticular, we show that the entire parameter region except for a narrow Higgsresonance window is ruled out in the symmetric case for fermion dark matterwhen the coupling to the Higgs dominates over the coupling to leptons, whilelarge portions of parameter space are still allowed for the asymmetric case.The same is also true for a dark matter mass above 8 GeV for scalar dark matterwhen the coupling to leptons dominates over the coupling to the Higgs.

Lepton-Flavored Asymmetric Dark Matter and Interference in Direct Detection