We report on a search for the flavor-changing neutral current decay $D^0 to mu^+mu^-$ using $50 times 10^6$ events recorded with a dimuon trigger in interactions of 920 GeV protons with nuclei by the HERA-B experiment. We find no evidence for such decays and set a 90% confidence level upper limit on the branching fraction $Br(D^0 to mu^+mu^-) <2.0 times 10^{-6}$
Search for the flavor-changing neutral current decay D(0) ->mu(+)mu(-) with the HERA-B detector
BARGIOTTI, MARIANNE;BERTIN, ANTONIO;DE CASTRO, STEFANO;FABBRI, LAURA;FACCIOLI, PIETRO;GRIMALDI, FILIPPO;MASSA, IGNAZIO GIACOMO;PICCININI, MAURIZIO;SBRIZZI, ANTONIO;SEMPRINI CESARI, NICOLA;VILLA, MAURO;VITALE, ANTONIO;ZOCCOLI, ANTONIO
2004
Abstract
We report on a search for the flavor-changing neutral current decay $D^0 to mu^+mu^-$ using $50 times 10^6$ events recorded with a dimuon trigger in interactions of 920 GeV protons with nuclei by the HERA-B experiment. We find no evidence for such decays and set a 90% confidence level upper limit on the branching fraction $Br(D^0 to mu^+mu^-) <2.0 times 10^{-6}$File in questo prodotto:
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