Collaboration, B (Including:

). (2010) Evidence for direct CP violation in the measurement of the Cabbibo-Kobayashi-Maskawa angle gamma with B--/+ -> D-(*K-)(()*()-/+) decays. Physical Review Letters, Vol.105 (No.12). article no. 121801 . doi:10.1103/PhysRevLett.105.121801

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Abstract

We report the measurement of the Cabibbo-Kobayashi-Maskawa CP-violating angle gamma through a Dalitz plot analysis of neutral D-meson decays to K-S(0)pi(+) pi(-) and K-S(0) K+ K- produced in the processes B--/+ -> DK -/+, B--/+ -> D* K--/+ with D* -> D pi(0), D gamma and B -/+ DK*-/+ with K*(-/+) -> K-S(0)pi(-/+), using 468 million B (B) over bar pairs collected by the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at SLAC. We measure gamma = (68 +/- 14 +/- 4 +/- 3)degrees (modulo 180 degrees), where the first error is statistical, the second is the experimental systematic uncertainty, and the third reflects the uncertainty in the description of the neutral D decay amplitudes. This result is inconsistent with gamma = 0 ( no direct CP violation) with a significance of 3.5 standard deviations.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Journal or Publication Title:	Physical Review Letters
Publisher:	American Physical Society
ISSN:	0031-9007
Official Date:	16 September 2010
Dates:	Date Event 16 September 2010 Published
Volume:	Vol.105
Number:	No.12
Number of Pages:	7
Page Range:	article no. 121801
DOI:	10.1103/PhysRevLett.105.121801
Status:	Peer Reviewed
Publication Status:	Published

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