Speaker
Alina Kleimenova
Description
A study of a sample of 4 109 tagged π0 mesons from K+→π+π0(γ) is performed at the NA62 experiment at CERN, searching for the decay of the π0 to invisible particles. No signal is observed in excess of the expected background fluctuations. An upper limit of 4.4 10−9 is set on the branching ratio at 90% C.L. improving on previous results by a factor of 60.
