We have measured upper limits on branching fractions for rare exclusive decays of B mesons arising from one-loop diagrams in the standard model of electroweak interactions. We also obtain an upper limit for the lepton-number-violating decay B0→μ±e∓.
Bibliographical noteFunding Information:
We areg ratefuflo r the excellenetf fortso f the CESR staffw hichm adet hiswork possibleR. . Kass thanks the OJI programo f the DOE, P.S.D. thankst hePYI programo f the NSF, and R.P. thankst heA.P. Sloan Foundatiofno r supportT. hiswork was supportebdy the NationaSl cienceF oundatioann dthe US Department of Energy under ContractN os. DE-AC02-76ER01428, DE-AC02-76ER03066, DE-AC02-76ER03064, DE-AC02-76ER01545, DE-AC02-76ER05001a, nd FG05-86-ER40272T.h e Cornell NationaSl upercomputiFnagc ility,f undedin partb y theN SF, NY statea ndI BM, wasu sedi n this research.