Speaker
Mr
Jinlin Fu
(Nanjing University)
Description
At BESIII, with 106 million psi(2S) events at BESIII, we have searched for a light Higgs-like boson A0 in the process psi(2S)-> pi+pi- J/psi, J/psi->\gamma A0, A0-> mu+mu-. We set 90% confidence level upper limits on
the product branching fractions for J/psi -> gammaA0, A0 -> mu+mu−
that range from 4 * 10^−7 to 2.1 * 10^−5, depending on the mass of A0, for M(A0) < 3.0 GeV/c2. Using J/psi-> \phi eta, phi \etap in 225 million J/psi decay events, we also make an updated analysis for \eta /\etap -> invisible decay. No evidence is found for these rare decays, and upper limits
at 90\% confidence level are set, which are 5-10 times stringent than previous limits set by the previous BESII experiment.
Primary author
Mr
Jinlin Fu
(Nanjing University)
