Evidence for B+->(K)over-bar(0)K(+) and B-0 -> K-0(K)over-bar(0), and measurement of the branching fraction and search for direct CP violation in B+-> K-0 pi(+)

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Evidence for B+->(K)over-bar(0)K(+) and B-0 -> K-0(K)over-bar(0), and measurement of the branching fraction and search for direct CP violation in B+-> K-0 pi(+)

Aubert, B; Barate, R; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, JP; Poireau, V; ... BABAR Collaboration; + view all (2005) Evidence for B+->(K)over-bar(0)K(+) and B-0 -> K-0(K)over-bar(0), and measurement of the branching fraction and search for direct CP violation in B+-> K-0 pi(+). PHYS REV LETT , 95 (22) , Article 221801. 10.1103/PhysRevLett.95.221801. Green open access

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Abstract

We present evidence for the b -> d penguin-dominated decays B+->(K) over bar K-0(+) and B-0-> K-0(K) over bar (0) in 227x10(6) Upsilon(4S)-> B (B) over bar decays collected with the BABAR detector. We measure the branching fractions B(B+->(K) over bar K-0(+))=(1.5 +/- 0.5 +/- 0.1)x10(-6)(< 2.4x10(-6)) and B(B-0-> K-0(K) over bar (0))=(1.19(-0.35)(+0.40)+/- 0.13)x10(-6), where the uncertainties are statistical and systematic, respectively. We also present improved measurements of the charge-averaged branching fraction B(B+-> K(0)pi(+))=(26.0 +/- 1.3 +/- 1.0)x10(-6) and CP-violating charge asymmetry A(CP)(K(0)pi(+))=-0.09 +/- 0.05 +/- 0.01, where the uncertainties are statistical and systematic, respectively.

Type:	Article
Title:	Evidence for B+->(K)over-bar(0)K(+) and B-0 -> K-0(K)over-bar(0), and measurement of the branching fraction and search for direct CP violation in B+-> K-0 pi(+)
Open access status:	An open access version is available from UCL Discovery
DOI:	10.1103/PhysRevLett.95.221801
Publisher version:	http://dx.doi.org/10.1103/PhysRevLett.95.221801
Language:	English
Additional information:	© 2005 The American Physical Society
Keywords:	CKM ANGLE-GAMMA, DECAYS, FACTORIZATION, ASYMMETRIES, PHYSICS, PHASE
UCL classification:	UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI:	https://discovery.ucl.ac.uk/id/eprint/1303760

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