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Evidence for direct CP violation from Dalitz-plot analysis of B-+/--> K-+/-pi(-/+)pi(+/-)

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BABAR Collaboration (Including:

Aubert, B., Bona, M., Karyotakis, Y., Lees, J. P., Poireau, V., Prencipe, E., Prudent, X., Tisserand, V., Garra Tico, J., Grauges, E. et al.
). (2008) Evidence for direct CP violation from Dalitz-plot analysis of B-+/--> K-+/-pi(-/+)pi(+/-). Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.78 (No.1). Article no. 012004. doi:10.1103/PhysRevD.78.012004 ISSN 1550-7998.

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Abstract

We report a Dalitz-plot analysis of the charmless hadronic decays of charged B mesons to the final state K-+/-pi(-/+)pi(+/-). Using a sample of (383.2 +/- 4.2) x 10(6) B (B) over bar pairs collected by the BABAR detector, we measure CP-averaged branching fractions and direct CP asymmetries for intermediate resonant and nonresonant contributions. We find evidence for direct CP violation in the decay B-+/- -> rho(0)(770)K-+/-, with a CP-violation parameter A(CP) = (+44 +/- 10 +/- 4(-13)(+5))%.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title: Physical Review D (Particles, Fields, Gravitation and Cosmology)
Publisher: American Physical Society
ISSN: 1550-7998
Official Date: July 2008
Dates:
DateEvent
July 2008Published
Volume: Vol.78
Number: No.1
Number of Pages: 13
Page Range: Article no. 012004
DOI: 10.1103/PhysRevD.78.012004
Status: Peer Reviewed
Publication Status: Published
Funder: U. S. Department of Energy and National Science Foundation, Natural Sciences and Engineering Research Council (Canada), Commissariat a l'Energie Atomique and Institut National de Physique Nucleaire et de Physique des Particules (France), Bundesministerium fur Bildung und Forschung and Deutsche Forschungs-gemeinschaft (Germany), Istituto Nazionale di Fisica Nucleare (Italy), Foundation for Fundamental Research on Matter (The Netherlands), Research Council of Norway, Ministry of Education and Science of the Russian Federation, Ministerio de Educacion y Ciencia (Spain), Science and Technology Facilities Council (United Kingdom), Marie-Curie IEF program (European Union), A. P. Sloan Foundation

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