Speaker
Mr
Chan Seok Park
(Yonsei Univ.)
Description
We present a search for a non-Standard-Model particle X^0 in the mass range 0.1-1.8 GeV/c in B^+ \to e^+ X^0 and B^+ \to \mu^+ X^0 decays. The results are obtained from a 711 fb^{-1} data sample collected at the Y(4S) resonance, with the Belle detector at the KEKB energy asymmetric e^+ e^- collider. One B meson is fully reconstructed in a hadronic mode to enable the precise analysis of the signal decay’s lepton in the recoiling partner B meson. We find no evidence of a signal and upper limits of branching fractions are set.
Primary author
Mr
Chan Seok Park
(Yonsei Univ.)
