Xun-Jie Xu (Université Libre Bruxelles, Brussels, Belgium)
Dark forces from right-handed neutrinos
Right-handed neutrinos are often considered as a portal to new hidden physics. It is tempting to consider a gauge singlet scalar that exclusively couples to right-handed neutrinos. Although such a scalar does not couple to normal matter at tree level, loop- induced effective interactions are inevitable. And the magnitude of the loop-induced couplings coincidentally meets the current sensitivity of fifth-force searches. In particular, the loop-induced coupling to muons could be tested in the recent LIGO observations of neutron star mergers. Talk based on 2007.01893, 2012.09980