One-loop electroweak corrections to spin-independent dark matter-nucleon scattering in a U(1)χ vector dark matter model are computed; they reach K-factors around 2.5 and can move otherwise allowed parameter points above the XENON1T exclusion limit.
On the importance of loop-induced spin-independent interactions for dark matter direct detection
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abstract
The latest results from LHC searches for jets in association with missing transverse energy place strong bounds on the scattering cross section of dark matter. For the case of spin-dependent or momentum suppressed interactions these limits seem to be superior to the bounds from direct detection experiments. In this article, we show that loop contributions can significantly alter this conclusion and boost direct detection bounds, whenever they induce spin-independent interactions. This effect is most striking for tensor and pseudotensor interactions, which induce magnetic and electric dipole moments at loop level. For axialvector and anapole interactions a relevant contribution to direct detection signals arises from loop-induced Yukawa-like couplings between dark matter and quarks. We furthermore compare the resulting bounds to additional constraints on these effective operators arising from indirect searches and relic density requirements.
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2019 1verdicts
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Electroweak Corrections to Dark Matter Direct Detection in a Vector Dark Matter Model
One-loop electroweak corrections to spin-independent dark matter-nucleon scattering in a U(1)χ vector dark matter model are computed; they reach K-factors around 2.5 and can move otherwise allowed parameter points above the XENON1T exclusion limit.