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Study of B±→J/ψπ± and B±→J/ψK± decays: Measurement of the ratio of branching fractions and search for direct CP-violating charge asymmetries

Abstract:
We have studied the B±→J/ψπ± and B±→J/ψK± decays using a 20.7 fb-1 data set collected with the BABAR detector. We observe a signal of 51±10 B±→J/ψπ± events and determine the ratio B(B± →J/ψπ±)/B(B±→J/ψ K±) to be [3.91±0.78(stat)±0.19(syst)]%. The CP-violating charge asymmetries for the B±→J/ψπ± and B±→J/ψK± decays are determined to be Aπ=0.01±0.22(stat)±0.01(syst) and AK =0.003±0.030(stat)±0.004(syst).

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Authors


Boutigny, D More by this author
Gaillard, J-M More by this author
Hicheur, A More by this author
Karyotakis, Y More by this author
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Journal:
Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume:
65
Issue:
9 A
Pages:
911011-911017
Publication date:
2002-05-01
ISSN:
0556-2821
URN:
uuid:a177b11e-55ab-456b-b0d6-55a74e65d1f7
Source identifiers:
228675
Local pid:
pubs:228675
Language:
English

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