Contribution of Majoron to Hubble tension in gauged U(1)${}_{L_{\mu }-L_{\tau }}$ Model

Kento Asai, Tomoya Asano, Joe Sato +1

In this paper, we analyze parameter regions that can alleviate the Hubble tension in the U(1)${}_{L_{\mu }-L_{\tau }}$ model with the broken lepton number U(1)${}_L$ symmetry. As new particles,…