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Improved measurement of the CKM angle gamma in B--/+->(DK(*)-/+)-K-(*) decays with a Dalitz plot analysis of D decays to K-S(0)pi(+)pi(-) and (KSK+K-)-K-0

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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) Improved measurement of the CKM angle gamma in B--/+->(DK(*)-/+)-K-(*) decays with a Dalitz plot analysis of D decays to K-S(0)pi(+)pi(-) and (KSK+K-)-K-0. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.78 (No.3). article no. 034023. doi:10.1103/PhysRevD.78.034023 ISSN 1550-7998.

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Official URL: http://dx.doi.org/10.1103/PhysRevD.78.034023

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Abstract

We report on an improved measurement of the Cabibbo-Kobayashi-Maskawa CP-violating phase gamma through a Dalitz plot analysis of neutral D meson decays to K-S(0)pi(+)pi(-) and (KSK+K-)-K-0 produced in the processes B--/+-> DK -/+, B--/+->(DK -/+)-K-* with D-*-> D pi(0), D gamma, and B--/+-> DK*-/+ with K-*-/+-> K-S(0)pi(-/+). Using a sample of 383x10(6) B (B) over bar pairs collected by the BABAR detector, we measure gamma=(76 +/- 22 +/- 5 +/- 5)degrees (mod 180 degrees), where the first error is statistical, the second is the experimental systematic uncertainty, and the third reflects the uncertainty on the description of the Dalitz plot distributions. The corresponding 2-standard-deviation region is 29 degrees <gamma < 122 degrees. This result has a significance of direct CP violation (gamma not equal 0) of 3.0 standard deviations.

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: August 2008
Dates:
DateEvent
August 2008Published
Volume: Vol.78
Number: No.3
Number of Pages: 23
Page Range: article no. 034023
DOI: 10.1103/PhysRevD.78.034023
Status: Peer Reviewed
Publication Status: Published

Data sourced from Thomson Reuters' Web of Knowledge

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