Scotogenic explanation for the 95 GeV excesses
Pablo Escribano, Víctor Martín Lozano, Avelino Vicente
Abstract
Several hints of the presence of a new state at about 95 GeV have been observed recently. The CMS and ATLAS Collaborations have reported excesses in the diphoton channel at about this diphoton invariant mass with local statistical significances of $2.9\ensuremath{\sigma}$ and $1.7\ensuremath{\sigma}$, respectively. Furthermore, a $2\ensuremath{\sigma}$ excess in the $b\overline{b}$ final state was also observed at LEP, again pointing at a similar mass value. We interpret these intriguing hints of new physics in a variant of the Scotogenic model, an economical scenario that induces Majorana neutrino masses at the loop level and includes a viable dark matter candidate. We show that our model can explain the 95 GeV excesses while respecting the relevant collider, Higgs, and electroweak precision bounds and discuss other phenomenological features of our scenario.