BABAR Collaboration (Including: Harrison, P.F., Ilić, Jelena, Latham, Thomas, Mohanty, G. B. and Pappagallo, M.). (2007) Search for b -> u transitions in B-->[K+pi(-)pi(0)](D)K-. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.76 (No.11). ISSN 1550-7998

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Abstract

We search for decays of a B meson into a neutral D meson and a charged kaon, with the D meson decaying into a charged kaon, a charged pion, and a neutral pion. This final state can be reached through the b -> c transition B-->(DK-)-K-0 followed by the doubly Cabibbo-suppressed D-0 -> K+pi(-)pi(0), or the b -> u transition B-->(D) over tilde K-0(-) followed by the Cabibbo-favored (D) over bar (0)-> K+pi(-)pi(0). The interference of these two amplitudes is sensitive to the angle gamma of the unitarity triangle. We present results based on 226x10(6) e(+)e(-)->Upsilon(4S)-> B (B) over bar events collected with the BABAR detector at SLAC. We find no significant evidence for these decays and we set a limit R-ADS equivalent to Gamma([K+ pi(-) pi(0)](D)K-) +Gamma([K- pi(+) pi(0)](D)K+)/Gamma([K+ pi(-) pi(0)](D)K+) +Gamma(K- pi(+) pi(0)](D)K-) < 0.039 at 95% confidence level, which we translate with a Bayesian approach into r(B)equivalent to|A(B-->(D) over bar K-0(-))/A(B-->(DK-)-K-0)|< 0.19 at 95% confidence level.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Journal or Publication Title:	Physical Review D (Particles, Fields, Gravitation and Cosmology)
Publisher:	American Physical Society
ISSN:	1550-7998
Date:	December 2007
Volume:	Vol.76
Number:	No.11
Number of Pages:	8
Identification Number:	10.1103/PhysRevD.76.111101
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
URI:	http://wrap.warwick.ac.uk/id/eprint/30742

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