Observation and polarization measurement of B{sup 0}{yields}a{sub 1}(1260){sup +}a{sub 1}(1260){sup -} decay
- Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France)
- Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
- INFN Sezione di Bari, I-70126 Bari (Italy)
- University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
- 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, Vol. 80, Issue 9; Other Information: DOI: 10.1103/PhysRevD.80.092007; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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