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Branching fractions and CP asymmetries in B-0 ->pi(0)pi(0), B+->pi(+)pi(0), and B+-> K+pi(0) decays and isospin analysis of the B ->pi pi system

Aubert, B; Barate, R; Boutigny, D; Couderc, F; Karyotakis, Y; Lees, JP; Poireau, V; ... BaBar Collaboration; + view all (2005) Branching fractions and CP asymmetries in B-0 ->pi(0)pi(0), B+->pi(+)pi(0), and B+-> K+pi(0) decays and isospin analysis of the B ->pi pi system. PHYS REV LETT , 94 (18) , Article 181802. 10.1103/PhysRevLett.94.181802. Green open access

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Abstract

Based on a sample of 227x10(6) B(B) over bar pairs collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC, we measure the branching fraction B(B-0→π(0)π(0))=(1.17± 0.32± 0.10)x10(-6), and the asymmetry C-π(0)π(0)=-0.12± 0.56± 0.06. The B-0→π(0)π(0) signal has a significance of 5.0σ. We also measure B(B+→π(+)π(0))=(5.8± 0.6± 0.4)x10(-6), B(B+→ K+π(0))=(12.0± 0.7± 0.6)x10(-6), and the charge asymmetries A(π)(+)π(0)=-0.01± 0.10± 0.02 and A(K)(+)π(0)=0.06± 0.06± 0.01. Using isospin relations, we find an upper bound on the angle difference |α-α(eff)| of 35° at the 90% C.L.

Type: Article
Title: Branching fractions and CP asymmetries in B-0 ->pi(0)pi(0), B+->pi(+)pi(0), and B+-> K+pi(0) decays and isospin analysis of the B ->pi pi system
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.94.181802
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.94.181802
Language: English
Additional information: © 2005 The American Physical Society
Keywords: B-DECAYS
UCL classification: UCL
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 > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1303713
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