Search for leptonic decays of D0 mesons

Abstract

We search for the flavor-changing neutral current decays D0\to mu+mu- and D0\to e+e-, and for the lepton-flavor violating decays D0\to e\pm mu\mp using 660 fb^-1 of data collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. We find no evidence for any of these decays. We obtain significantly improved upper limits on the branching fractions: B(D0\to mu+mu-)<1.4x10-7, B(D0\to e+e-)<7.9x10-8, and B(D0\to e+mu-)+B(D0\to mu+e-)<2.6x10-7 at 90% confidence level.

6 pages, 3 figures

References in corpus (2)

• Accumulating evidence for nonstandard leptonic decays of D_s mesons
• Relating D0-anti-D0 Mixing and D0 -> l+l- with New Physics

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