Search for Lepton-number-violating B+Dl+l+B^+ \to D^- l^+ l^{\prime +} Decays

Collaboration
Jul, 2011

Citations per year

201120142017202020230246810
Abstract: (arXiv)
We perform the first search for lepton-number-violating B+->D-l+l'+ decays, where l and l' stand for e or mu, using 772 x 10^6 BB-bar pairs accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB e^+e^- collider. No evidence for these decays has been found. Assuming uniform three-body phase space distributions for the D-l+l+ decays, we set the following upper limits on the branching fractions at 90% confidence level: Br(B+ -> D-e+e+) < 2.6x10^-6, Br(B+ -> D-e+mu+) < 1.8x10^-6 and Br(B+ -> D-mu+mu+) < 1.0x10^-6.
Note:
  • 7 pages, 2 figures
  • 11.30.Er
  • 14.40.Nd
  • 13.25.Hw
  • electron positron: annihilation
  • B: pair production
  • B+: semileptonic decay
  • lepton number: violation
  • B+: branching ratio: upper limit
  • BELLE
  • experimental results