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arXiv · 1905.11407

Dark matter seeping through dynamic gauge kinetic mixing

Avik Banerjee·Gautam Bhattacharyya·Debtosh Chowdhury·Yann Mambrini
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Abstract

We show for the first time that the loop-driven kinetic mixing between visible and dark Abelian gauge bosons can facilitate dark matter production in the early Universe by creating a 'dynamic' portal, which depends on the energy of the process. The required smallness of the strength of the portal interaction, suited for freeze-in, is justified by a suppression arising from the mass of a heavy vector-like fermion. The strong temperature sensitivity associated with the interaction is responsible for most of the dark matter production during the early stages of reheating.

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Avik Banerjee, Gautam Bhattacharyya, Debtosh Chowdhury, Yann Mambrini. 2019-11-01. Dark matter seeping through dynamic gauge kinetic mixing. https://doi.org/10.1088/1475-7516%2F2019%2F12%2F009

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