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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

Author(s)
Sciolla, Gabriella; Yamamoto, R. K.; Cowan, Ray F; Taylor, Frank E
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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
Terms of use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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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.
Date issued
2004-06
URI
http://hdl.handle.net/1721.1/70886
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
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
ISSN
0031-9007
1079-7114

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