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Abstract:
In this talk, I present a new paradigm of dark matter freeze-out, where the annihilation of dark matter particles is catalyzed. In this regime, the depletion of dark matter proceeds via 2χ→2A′ and 3A′→2χ processes, where χ and A′ denote dark matter and the catalyst, respectively. In the early universe, the dark matter number density is depleted polynomially rather than exponentially (Boltzmann suppression) as in classical WIMPs and SIMPs. The paradigm applies for a secluded weakly interacting dark sector with dark matter in the MeV-TeV mass range. The catalyzed annihilation paradigm is compatible with CMB and BBN constraints, with enhanced indirect detection signals.
Brief biography:
Chuan-Yang Xing is currently a PhD student in Peking University in Beijing, China, under the supervision of Prof. Shou-hua Zhu. He received Bachelor of Science degree in Shandong University in 2013. Mr. Xing is interested in various aspects of particle physics, including Higgs physics, new physics beyond the Standard Model and dark matter. Currently, his research mainly focuses on the evolution of dark matter in the early universe and new paradigms resulting in the observed dark matter abundance, which are, in the meantime, compatible with the stringent direct detection constraints.
Tencent information: https://meeting.tencent.com/dm/jt8C7NzdJjrU
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