PIRSA:19100039

Inelastic dark matter revives the dark photon explanation of the muon g-2 anomaly.

Mohlabeng, G. (2019). Inelastic dark matter revives the dark photon explanation of the muon g-2 anomaly.. Perimeter Institute. https://pirsa.org/19100039

Mohlabeng, Gopolang. Inelastic dark matter revives the dark photon explanation of the muon g-2 anomaly.. Perimeter Institute, Oct. 01, 2019, https://pirsa.org/19100039 

          @misc{ pirsa_PIRSA:19100039,
            doi = {10.48660/19100039},
            url = {https://pirsa.org/19100039},
            author = {Mohlabeng, Gopolang},
            keywords = {Cosmology},
            language = {en},
            title = {Inelastic dark matter revives the dark photon explanation of the muon g-2 anomaly.},
            publisher = {Perimeter Institute},
            year = {2019},
            month = {oct},
            note = {PIRSA:19100039 see, \url{https://pirsa.org}}
          }

Gopolang Mohlabeng Simon Fraser University (SFU)

DOI 10.48660/19100039
Collection
Talk Type Scientific Series
Subject

Abstract

A massive U(1)' gauge boson known as a “dark photon” or A', has long been proposed as a potential explanation for the muon g − 2 anomaly. Recently, experimental results have excluded this possibility for a dark photon decaying visibly and invisibly. I revisit this idea and consider a model where A' couples to inelastic dark matter, leading to a semi-visible decay mode. I show that for large mass splittings between the dark sector states this decay mode is enhanced, weakening the invisibly decaying dark photon bounds. As a consequence, A' resolves the g −2 anomaly in a region of parameter space the thermal dark matter component of the Universe is readily explained.