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Time-dependent amplitude analysis of B0 -> KS0π+π-

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BaBar Collaboration (Including: Gershon, T. J., Harrison, P. F., Ilić, Jelena, Latham, Thomas, Mohanty, G. B. and Puccio, E. M. T.). (2009) Time-dependent amplitude analysis of B0 -> KS0π+π-. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.80 (No.11). 112001 . ISSN 1550-7998

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Official URL: http://dx.doi.org/10.1103/PhysRevD.80.112001

Abstract

We perform a time-dependent amplitude analysis of B-0 -> K-S(0)pi(+)pi(-) decays to extract the CP violation parameters of f(0)(980)K-S(0) and rho(0)(770)K-S(0) and the direct CP asymmetry of K*+(892)pi(-). The results are obtained from a data sample of (383 +/- 3)x10(6) BB decays, collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We find two solutions, with an equivalent goodness-of-fit. Including systematic and Dalitz plot model uncertainties, the combined confidence interval for values of the CP parameter beta(eff) in B-0 decays to f(0)(980)K-S(0) is 18 degrees <beta(eff)< 76 degrees at 95% confidence level (C.L). CP conservation in B-0 decays to f(0)(980)K-S(0) is excluded at 3.5 standard deviations including systematic uncertainties. For B-0 decays to rho(0)(770)K-S(0), the combined confidence interval is -9 degrees <beta(eff)< 57 degrees at 95% C.L. In decays to K*+(892)pi(-) we measure the direct CP asymmetry to be A(CP)=-0.20 +/- 0.10 +/- 0.01 +/- 0.02. The measured phase difference (including (BB0)-B-0 mixing) between decay amplitudes of B-0 -> K*+(892)pi(-) and B-0 -> K*-(892)pi(+), excludes the interval -137 degrees <Delta Phi(K*+(892)pi(-))<-5 degrees at 95% C.L.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	B mesons -- Decay, CP violation (Nuclear physics)
Journal or Publication Title:	Physical Review D (Particles, Fields, Gravitation and Cosmology)
Publisher:	American Physical Society
ISSN:	1550-7998
Date:	December 2009
Volume:	Vol.80
Number:	No.11
Number of Pages:	28
Page Range:	112001
Identification Number:	10.1103/PhysRevD.80.112001
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	SLAC National Accelerator Laboratory, United States. Dept. of Energy, National Science Foundation (U.S.) (NSF), Natural Sciences and Engineering Research Council of Canada (NSERC), France. Commissariat à l'énergie atomique (CEA), Institut national de physique nucléaire et de physique des particules, 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], Russia (Federation). Ministerstvo obrazovanii︠a︡ i nauki [Ministry of Education and Science], Spain. Ministerio de Educación y Ciencia (MEC), Science and Technology Facilities Council (Great Britain) (STFC), European Union (EU), Alfred P. Sloan Foundation
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URI:	http://wrap.warwick.ac.uk/id/eprint/16671