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arXiv · 2212.07622

Dynamics of the pseudo-FIMP in presence of a thermal Dark Matter

Subhaditya Bhattacharya·Jayita Lahiri·Dipankar Pradhan
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Abstract

We demonstrate that in a two component dark matter (DM) set up, when DM$_1$ is equilibrated with the thermal bath, the other DM$_2$, in spite of having feeble or negligible interaction with the SM particles, can be brought to equilibrium just by having sizeable interaction with DM$_1$. We propose that such DM candidates (DM$_2$) should be classified into a category called pseudo-FIMP (pFIMP) having unique freeze-out characteristics which depend on the thermal DM partner. The draft elaborates upon the pFIMP properties from a generic coupled Boltzmann Equations (cBEQ) in a model independent way, followed by a concrete model illustration.

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Subhaditya Bhattacharya, Jayita Lahiri, Dipankar Pradhan. 2022-12-15. Dynamics of the pseudo-FIMP in presence of a thermal Dark Matter. https://doi.org/10.1103/physrevd.108.l111702

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