New results for searches of exotic decays with NA62 in beam-dump mode

Abstract

We report on the search for visible decays of exotic mediators from data taken in "beam-dump" mode with the NA62 experiment. The NA62 experiment can be run as a "beam-dump experiment" by removing the kaon production target and dumping the proton beam in closed collimators. More than 10 17 protons on target have been collected in this way during a week-long data-taking campaign by the NA62 experiment. We report on new results from analysis of this data, with a particular emphasis on dark photon and axion-like particle models.