Dark matter annihilation via Breit-Wigner enhancement with heavier mediator

We propose a new scenario that both the dark matter freeze-out in the early Universe and its possible annihilation for indirect detection around a supermassive black hole are enhanced by a Breit-Wigner resonance. With the mediator mass larger than the total initial dark matter mass, this annihilatio...

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Bibliographic Details
Main Authors: Yu Cheng, Shao-Feng Ge, Jie Sheng, Tsutomu T. Yanagida
Format: Article
Language:English
Published: Elsevier 2025-02-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269325000504
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