Evidence for Charged B Meson Decays to a{sub 1}{sup {+-}}(1260){pi}{sup 0} and a{sub 1}{sup 0}(1260){pi}{sup {+-}}

Journal Article · Mon Dec 31 04:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.99.261801· OSTI ID:21028227

Aubert, B; Bona, M; Boutigny, D; Karyotakis, Y; Lees, J P; Poireau, V; Prudent, X; Tisserand, V; Zghiche, A ^[1]; Garra Tico, J; Grauges, E ^[2]; Lopez, L; Palano, A ^[3]; Eigen, G; Stugu, B; Sun, L ^[4]; Abrams, G S; Battaglia, M; Brown, D N; Button-Shafer, J ^[5]

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1. Laboratoire de Physique des Particules, IN2P3/CNRS et Universite de Savoie, F-74941 Annecy-Le-Vieux (France)
2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
3. Universita di Bari, Dipartimento di Fisica and INFN, I-70126 Bari (Italy)
4. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
5. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

We present measurements of the branching fractions for the decays B{sup {+-}}{yields}a{sub 1}{sup {+-}}(1260){pi}{sup 0} and B{sup {+-}}{yields}a{sub 1}{sup 0}(1260){pi}{sup {+-}} from a data sample of 232x10{sup 6} BB pairs produced in e{sup +}e{sup -} annihilation through the {upsilon}(4S) resonance. We measure the branching fraction B(B{sup {+-}}{yields}a{sub 1}{sup {+-}}(1260){pi}{sup 0})xB(a{sub 1}{sup {+-}}(1260){yields}{pi}{sup -}{pi}{sup +}{pi}{sup {+-}})=( = 13.2{+-}2.7{+-}2.1)x10{sup -6} with a significance of 4.2{sigma}, and the branching fraction B(B{sup {+-}}{yields}a{sub 1}{sup 0}(1260){pi}{sup {+-}})xB(a{sub 1}{sup 0}(1260){yields}{pi}{sup -}{pi}{sup +}{pi}{sup 0})=(20.4{+-}4.7{+-}3.4)x10{sup -6} with a significance of 3.8{sigma}, where the first error quoted is statistical and the second is systematic.

• OSTI ID: 21028227
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 26 Vol. 99; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
A1-1260 MESONS
ANNIHILATION
B MINUS MESONS
B PLUS MESONS
BRANCHING RATIO
ELECTRON-POSITRON INTERACTIONS
ELECTRONS
PAIR PRODUCTION
PARTICLE DECAY
PIONS MINUS
PIONS NEUTRAL
PIONS PLUS
POSITRONS