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arXiv · 1302.1657

Electroweak corrections to the direct detection cross section of inert higgs dark matter

Michael Klasen·Carlos E. Yaguna·Jose D. Ruiz-Alvarez
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Abstract

The inert higgs model is a minimal extension of the Standard Model that features a viable dark matter candidate, the so-called inert higgs ($H^0$). In this paper, we compute and analyze the dominant electroweak corrections to the direct detection cross section of dark matter within this model. These corrections arise from one-loop diagrams mediated by gauge bosons that, contrary to the tree-level result, do not depend on the unknown scalar coupling $λ$. We study in detail these contributions and show that they can modify in a significant way the prediction of the spin-independent direct detection cross section. In both viable regimes of the model, $\mh<M_W$ and $\mh\gtrsim 500 \gev$, we find regions where the cross section at one-loop is much larger than at tree-level. We also demonstrate that, over the entire viable parameter space of this model, these new contributions bring the spin-independent cross section within the reach of future direct detection experiments.

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Michael Klasen, Carlos E. Yaguna, Jose D. Ruiz-Alvarez. 2013-02-07. Electroweak corrections to the direct detection cross section of inert higgs dark matter. https://doi.org/10.1103/physrevd.87.075025

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