Unitarity constraints on asymmetric freeze-in

Details Unitarity constraints on asymmetric freeze-in Unitarity constraints on asymmetric freeze-in

2011-05-18

arxiv.org/abs/1105.3728v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 7 figures, change in notation, accepted to prd

Scientific paper

This paper considers unitarity and CPT constraints on asymmetric freeze-in, the use of freeze-in to store baryon number in a dark sector. In this scenario, Sakharov's out of equilibrium condition is satisfied by placing the visible and hidden sectors at different temperatures while a net visible baryon number is produced by storing negative baryon number in a dark sector. It is shown that unitarity and CPT lead to unexpected cancellations. In particular, the transfer of baryon number cancels completely at leading order.

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