Measurement of B --> Xsl+l- Branching Fraction with a Sum over Exclusive Modes
We measure the branching fraction for the flavor-changing neutral-current process B {yields} X{sub s}{ell}{sup +}{ell}{sup -} with a sample of 89 x 10{sup 6} {Upsilon}(4S) {yields} B{bar B} events recorded with the BABAR detector at the PEP-II e{sup +}e{sup -} storage ring. The final state is reconstructed from e{sup +}e{sup -} or {mu}{sup +}{mu}{sup -} pairs and a hadronic system X{sub s} consisting of one K{sup {+-}} or K{sub s}{sup 0} and up to two pions, with at most one {pi}{sup 0}. We observe a signal of 40 {+-} 10(stat) {+-} 2(syst) events and extract the inclusive branching fraction {Beta} (B {yields} X{sub s}{ell}{sup +}{ell}{sup -}) = (5.6 {+-} 1.5(stat) {+-} 0.6(exp syst) {+-} 1.1(model syst)) x 10{sup -6} for m{sub {ell}{sup +}{ell}{sup -}} > 0.2 GeV/c{sup 2}.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 826854
- Report Number(s):
- SLAC-PUB-10395; TRN: US0404195
- Resource Relation:
- Other Information: PBD: 5 Apr 2004
- Country of Publication:
- United States
- Language:
- English
Similar Records
Measurements of the B to Xs gamma Branching Fraction and Spectral Shape from a Sum of Exclusive Final States
Observation of the Decay B -> Jpsi eta K and search for the X(3872) -> jpsi eta