BABAR Collaboration (Including: Gershon, T. J. and Harrison, P. F.). (2011) Search for b→u transitions in B^{±}→[K^{∓}π^{±}π^{0}]_{D}K^{±} decays. Physical Review D, Vol.84 (No.1). Article 012002 . ISSN 0556-2821

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Abstract

We present a study of the decays B(+) -> DK(+) with D mesons reconstructed in the K(+)pi(-)pi(0) or K(-)pi(+)pi(0) final states, where D indicates a D(0) or a (D) over bar (0) meson. Using a sample of 474 x 10(6) B (B) over bar pairs collected with the BABAR detector at the PEP- II asymmetric- energy e(+)e(-) collider at SLAC, we measure the ratios R +/- equivalent to Gamma(B(+)->[K(-/+)pi(+)pi(0)](D)K(+))/Gamma(B(+)->[K(+)pi(-/+)pi(0)](D)K(+)). We obtain R+ = (5(-10)(+12)(stat)(4)(2)(syst)) X 10(-3) and R(-) = (12(-10)(+12)(stat)(-5)(+3)(syst)) X 10(-3), from which we extract the upper limits at 90% probability: R(+) < 23 X 10(-3) and R- < 29 X 10(-3). Using these measurements, we obtain an upper limit for the ratio r(B) of the magnitudes of the b -> u and b -> c amplitudes r(B) < 0.13 at 90% probability.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Radiative transitions, Radioactive decay, Mesons
Journal or Publication Title:	Physical Review D
Publisher:	American Physical Society
ISSN:	0556-2821
Date:	6 July 2011
Volume:	Vol.84
Number:	No.1
Page Range:	Article 012002
Identification Number:	10.1103/PhysRevD.84.012002
Status:	Peer Reviewed
Publication Status:	Published
Funder:	United States. Dept. of Energy (DOE), National Science Foundation (U.S.) (NSF), Natural Sciences and Engineering Research Council Canada (NSERC), France. Commissariat à l'énergie atomique (CEA), Institut national de physique nucléaire et de physique des particules (IN2P3), Germany. Bundesministerium für Bildung und Forschung (BMBF), Deutsche Forschungsgemeinschaft (DFG), Istituto nazionale di fisica nucleare (INFN), Stichting voor Fundamenteel Onderzoek der Materie (FOM) [Foundation for Fundamental Research on Matter], Norges forskningsråd [Norwegian Research Council] , Ministry of Education and Science of the Russian Federation (MESRF), Spain. Ministerio de Ciencia e Innovación (MCI), Science and Technology Facilities Council (Great Britain) (STFC), European Union (EU), Alfred P. Sloan Foundation, United States-Israel Binational Science Foundation
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URI:	http://wrap.warwick.ac.uk/id/eprint/38788

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