|Title:||Search for a massive invisible particle X0 in B+ →e+X0 and B+ →μ+X0 decays||Authors:||Chistov, R.
Park, C. S.
Nisar, N. K.
Kim, K. T.
Kim, J. B.
Mohanty, G. B.
Kim, M. J.
|Issue Date:||18-Jul-2016||Journal Volume:||94||Journal Issue:||1||Source:||Physical Review D||Abstract:||
© 2016 American Physical Society. We present a search for a non-Standard-Model invisible particle X0 in the mass range 0.1-1.8 GeV/c2 in B+→e+X0 and B+→μ+X0 decays. The results are obtained from a 711 fb-1 data sample that corresponds to 772×106BB pairs, collected at the Ψ(4S) resonance with the Belle detector at the KEKB e+e- collider. One B meson is fully reconstructed in a hadronic mode to determine the momentum of the lepton of the signal decay in the rest frame of the recoiling partner B meson. We find no evidence of a signal and set upper limits on the order of 10-6.
|Appears in Collections:||物理學系|
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