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arXiv · 2111.14808

Dark Matter abundance via thermal decays and leptoquark mediators

Benedetta Belfatto·Dario Buttazzo·Christian Gross·Paolo Panci·Alessandro Strumia·Natascia Vignaroli·Ludovico Vittorio·Ryoutaro Watanabe
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Abstract

We explore a new mechanism for reproducing the Dark Matter (DM) abundance: scatterings of one DM particle on light Standard Model particles. Strong bounds on its decays can be satisfied if DM undergoes freeze-in and has a mass around or below the pion mass. This happens, for example, in theories with a right-handed neutrino interacting with charged fermions through a leptoquark exchange. These leptoquarks can be linked to the ones motivated by the B-physics anomalies if assumptions about the flavour structure are made. DM signals are unusual, with interesting possibilities for direct and indirect detection. Achieving thermal freeze-out instead requires models with more than one DM flavour, and couplings parametrically smaller than what needed by the usual pair annihilations.

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Benedetta Belfatto, Dario Buttazzo, Christian Gross, Paolo Panci, Alessandro Strumia, Natascia Vignaroli, Ludovico Vittorio, Ryoutaro Watanabe. 2021-11-29. Dark Matter abundance via thermal decays and leptoquark mediators. https://doi.org/10.1007/jhep06(2022)084

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