Measurement of the relative branching fraction of upsilon(4S) to charged and neutral B meson pairs
Collaboration
11 pages
Published in:
- Phys.Rev.Lett. 86 (2001) 2737-2741
e-Print:
- hep-ex/0006002 [hep-ex]
Report number:
- SLAC-REPRINT-2000-057,
- CLNS-00-1670,
- CLEO-00-7
Experiments:
View in:
Citations per year
Abstract: (arXiv)
We analyze 9.7 x 10^6 B\bar{B}$ pairs recorded with the CLEO detector to determine the production ratio of charged to neutral B-meson pairs produced at the Y(4S) resonance. We measure the rates for B^0 -> J/psi K^{(*)0} and B^+ -> J/psi K^{(*)+} decays and use the world-average B-meson lifetime ratio to extract the relative widths f+-/f00 = Gamma(Y(4S) -> B+B-)/Gamma(Y(4S) -> B0\bar{B0}) = = 1.04 +/- 0.07(stat) +/- 0.04(syst). With the assumption that f+- + f00 = 1, we obtain f00 = 0.49 +/- 0.02(stat) +/- 0.01(syst) and f+- = 0.51 +/- 0.02(stat) +/- 0.01(syst). This production ratio and its uncertainty apply to all exclusive B-meson branching fractions measured at the Y(4S) resonance.Note:
- 11 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS Report-no: CLNS00/1670, CLEO00-7
- electron positron: colliding beams
- electron positron: annihilation
- Upsilon(10570): electroproduction
- Upsilon(10570): hadronic decay
- B: pair production
- yield: (B+ B0)
- Upsilon(10570): branching ratio
- B: hadronic decay
- J/psi(3100): leptonic decay
- CLEO
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