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ID: 206488.0, MPI für Kernphysik / Heavy Flavour Physics
Search for the Flavor-Changing Neutral Current Decay D0->μ+μ-
with the HERA-B Detector
Authors:
Language:English
Date of Publication (YYYY-MM-DD):2004
Title of Journal:Physics Letters B
Journal Abbrev.:Phys.Lett.B
Volume:596
Start Page:173
End Page:183
Abstract / Description: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 $Br(D^0 \to \mu^+\mu^-) <2.0 \times 10^{-6}$.