Search for Lepton-number-violating Decays
Jul, 2011Citations per year
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
References(22)
Figures(5)