Particle Seminar

Date: 
Monday, October 7, 2019

Speaker: Gopolang (Gopi) Mohlabeng

Affiliation: BNL

Time: 2:30PM -- 3:30PM

Location: HP 4351

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

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 spacethe thermal dark matter component of the Universe is readily explained.