Measurement of the ratio of branching fractions B(B±-->J/ psi pi ±)/B(B±-->J/ psi K±)
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Abulencia-2009-Measurement of the r.pdf
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Author(s)
Paus, Christoph M. E.
Miles, Christopher J.
Leonardo, N.
Kravchenko, I.
Knuteson, Bruce O.
Iyutin, Boris
Henderson, C.
Hahn, Kristian Allan
Choudalakis, Georgios
Bolshov, Arkadiy
Alternative Title
Measurement of the ratio of branching fractions B(B[superscript ±]→J/ψπ[superscript ±])/B(B[superscript ±]→J/ψK[superscript ±])
Date Issued
June 2009
Journal
Physical Review D
Publisher
American Physical Society
Citation
CDF Collaboration et al. “Measurement of the ratio of branching fractions B(B±-->J/ psi pi ±)/B(B±-->J/ psi K±).” Physical Review D 79.11 (2009): 112003. © 2009 The American Physical Society
Version
Final published version
Abstract
We report a measurement of the ratio of branching fractions of the decays B[superscript ±]→J/ψπ[superscript ±] and B[superscript ±]→J/ψK[superscript ±] using the CDF II detector at the Fermilab Tevatron Collider. The signal from the Cabbibo-suppressed B[superscript ±]→J/ψπ[superscript ±] decay is separated from B[superscript ±]→J/ψK[superscript ±] using the B[superscript ±]→J/ψK[superscript ±] invariant mass distribution and the kinematical differences of the hadron track in the two decay modes. From a sample of 220 pb[superscript -1] of pp̅ collisions at √s=1.96 TeV, we observe 91±15 B[superscript ±]→J/ψπ[superscript ±] events together with 1883±34 B[superscript ±]→J/ψK[superscript ±] events. The ratio of branching fractions is found to be B(B[superscript ±]→J/ψπ[superscript ±])/B(B[superscript ±]→J/ψK[superscript ±])=(4.86±0.82(stat)±0.15(syst))%.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevD.79.112003
