Search for production of an invisible dark photon in π0 decays
Research output: Contribution to journal › Article
Colleges, School and Institutes
The results of a search forπ0decays to a photon and an invisible massive dark photon at the NA62 experiment at the CERN SPS are reported. From a total of4.12×10^8 tagged π0 mesons, no signal is observed. Assuming a kinetic-mixing interaction, limits are set on the dark photon coupling to the ordinary photon as a function of the dark photon mass,improving on previous searches in the mass range 60–110 MeV/c2. The present results are interpreted in terms of an upper limit of the branching ratio of the electroweak decay π0→γν ̄ν, improving the current limit by more than three orders of magnitude.
|Publication status||Published - 28 May 2019|