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Measurements of branching fractions and CP-violating asymmetries in B-0 ->pi(+)pi(-), K+ pi(-), K+K- decays

Aubert, B; Boutigny, D; Gaillard, JM; Hicheur, A; Karyotakis, Y; Lees, JP; Robbe, P; ... BABAR Collaboration, .; + view all (2002) Measurements of branching fractions and CP-violating asymmetries in B-0 ->pi(+)pi(-), K+ pi(-), K+K- decays. PHYS REV LETT , 89 (28) , Article 281802. 10.1103/PhysRevLett.89.281802. Green open access

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Abstract

We present measurements of branching fractions and CP-violating asymmetries for two-body neutral (B) over bar meson decays to charged pions and kaons based on a sample of about 88x10(6) Y(4S)-->B (B) over bar decays. From a time-independent fit we measure the charge-averaged branching fractions B(B-0-->pi(+)pi(-))=(4.7+/-0.6+/-0.2)x10(-6), B(B-0-->K(+)pi(-))=(17.9+/-0.9+/-0.7)x10(-6), and the direct CP-violating charge asymmetry A(Kpi)=-0.102+/-0.050+/-0.016 [-0.188,-0.016], where the ranges in square brackets indicate the 90% confidence intervals. From a time-dependent fit we measure the B-0-->pi(+)pi(-) CP-violating parameters S-pipi=0.02+/-0.34+/-0.05 [-0.54,+0.58] and C-pipi=-0.30+/-0.25+/-0.04 [-0.72,+0.12].

Type: Article
Title: Measurements of branching fractions and CP-violating asymmetries in B-0 ->pi(+)pi(-), K+ pi(-), K+K- decays
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.89.281802
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.89.281802
Language: English
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Brain Repair and Rehabilitation
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/1303618
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