PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY
Abstract
We report on a search for eleven lepton-number violating processes B+→X-l+l′+ with X-=K-, π-, ρ-, K*-, or D- and l+/l′+=e+ or μ+, using a sample of 471$\pm$3 million BB̄events collected with the BABAR detector at the PEP-II e+e- collider at the SLAC National Accelerator Laboratory. We find no evidence for any of these modes and place 90{\%} confidence level upper limits on their branching fractions in the range (1.5-26)×10-7.