Study of B[superscript ±]→J/ψπ[superscript ±] and B[superscript ±]→J/ψK[superscript ±] Decays: Measurement of the Ratio of Branching Fractions and Search for Direct CP Violation
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Aubert-2004-Study of B.pdf
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Author(s)
Sciolla, Gabriella
Yamamoto, R. K.
Cowan, Ray F
Taylor, Frank E
Alternative Title
Study of B±→J/ψπ± and B±→J/ψK± Decays: Measurement of the Ratio of Branching Fractions and Search for Direct CP Violation
Date Issued
June 2004
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aubert, B. et al. “Study of B±→J/ψπ± and B±→J/ψK± Decays: Measurement of the Ratio of Branching Fractions and Search for Direct CP Violation.” Physical Review Letters 92.24 (2004): Web. 18 May 2012. © 2004 American Physical Society
Version
Final published version
Abstract
We study B[superscript ±]→J/ψπ[superscript ±] and B[superscript ±]→J/ψK[superscript ±] decays in a sample of about 89×10[superscript 6] BB̅ pairs collected with the BABAR detector at the PEP-II asymmetric B factory at SLAC. We observe a signal of 244±20 B[superscript ±]→J/ψπ[superscript ±] events and determine the ratio B(B[superscript ±]→J/ψπ[superscript ±])/B(B[superscript ±]→J/ψK±) to be [5.37±0.45(stat)±0.11(syst)]%. The charge asymmetries for the B[superscript ±]→J/ψπ[superscript ±] and B[superscript ±]→J/ψ[superscript ±] decays are determined to be A[subscript π]=0.123±0.085(stat)±0.004(syst) and A[subscript K]=0.030±0.015(stat)±0.006(syst), respectively.
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
https://doi.org/10.1103/PhysRevLett.92.241802
