Observation and polarization measurement of B{sup 0}{yields}a{sub 1}(1260){sup +}a{sub 1}(1260){sup -} decay

Journal Article · Sun Nov 01 04:00:00 EST 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.092007· OSTI ID:21325452

Aubert, B; Karyotakis, Y; Lees, J P; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V ^[1]; Garra Tico, J; Grauges, E ^[2]; Martinelli, M; Palano, A; Pappagallo, M ^[3]; Eigen, G; Stugu, B; Sun, L ^[4]; Battaglia, M; Brown, D N; Kerth, L T; Kolomensky, Yu G; Lynch, G ^[5]

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1. Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France)
2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
3. INFN Sezione di Bari, 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 fraction B and longitudinal polarization fraction f{sub L} for B{sup 0}{yields}a{sub 1}(1260){sup +}a{sub 1}(1260){sup -} decays, with a{sub 1}(1260){sup {+-}}{yields}{pi}{sup -}{pi}{sup +}{pi}{sup {+-}}. The data sample, collected with the BABAR detector at the SLAC National Accelerator Laboratory, represents 465x10{sup 6} produced BB pairs. We measure B(B{sup 0}{yields}a{sub 1}(1260){sup +}a{sub 1}(1260){sup -})x[B(a{sub 1}(1260){sup +}{yields}{pi}{sup -}{pi}{sup +}{pi}{sup +})]{sup 2}(11.8{+-}2.6{+-}1.6)x10{sup -6} and f{sub L}=0.31{+-}0.22{+-}0.10, where the first uncertainty is statistical and the second systematic. The decay mode is measured with a significance of 5.0 standard deviations including systematic uncertainties.

• OSTI ID: 21325452
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 80; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
A1-1260 MESONS
B NEUTRAL MESONS
BRANCHING RATIO
FERMILAB ACCELERATOR
PARTICLE DECAY
PIONS PLUS
POLARIZATION
STANFORD LINEAR ACCELERATOR CENTER