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Observation and polarization measurement of B^{0}→a_{1}(1260)^{+}a_{1}(1260)^{-} decay

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Aubert, B., Karyotakis, Y., Lees, J. P., Poireau, V., Prencipe, E., Prudent, X., Tisserand, V., Garra Tico, J., Grauges, E., Martinelli, M. et al.
(2009) Observation and polarization measurement of B^{0}→a_{1}(1260)^{+}a_{1}(1260)^{-} decay. Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.80 (No.9). article no. 092007. doi:10.1103/PhysRevD.80.092007

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Official URL: http://dx.doi.org/10.1103/PhysRevD.80.092007

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Abstract

We present measurements of the branching fraction B and longitudinal polarization fraction fL for B0→a1(1260)+a1(1260)- decays, with a1(1260)±→π-π+π±. The data sample, collected with the BABAR detector at the SLAC National Accelerator Laboratory, represents 465×106 produced BB̅ pairs. We measure B(B0→a1(1260)+a1(1260)-)×[B(a1(1260)+→π-π+π+)]2= (11.8±2.6±1.6)×10-6 and fL=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.

Item Type: Journal Article
Divisions: Faculty of Science > Physics
Journal or Publication Title: Physical Review D (Particles, Fields, Gravitation and Cosmology)
Publisher: American Physical Society
ISSN: 1550-7998
Official Date: 2009
Dates:
DateEvent
2009UNSPECIFIED
Volume: Vol.80
Number: No.9
Page Range: article no. 092007
DOI: 10.1103/PhysRevD.80.092007
Status: Peer Reviewed
Publication Status: Published

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