Observation and Polarization Measurement of B0 --> a1(1260) a1(1260)- Decay
The authors present measurements of the branching fraction {Beta} 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 465 x 10{sup 6} produced B{bar B} pairs. They measure {Beta}(B{sup 0} {yields} a{sub 1}(1260){sup +} a{sub 1}(1260){sup -}) x [{Beta}(a{sub 1}(1260){sup +} {yields} {pi}{sup -}{pi}{sup +}{pi}{sup +})]{sup 2} = (11.8 {+-} 2.6 {+-} 1.6) x 10{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.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 962105
- Report Number(s):
- SLAC-PUB-13709; arXiv:0907.1776; TRN: US0902853
- Journal Information:
- Submitted to Physical Review Letters, Journal Name: Submitted to Physical Review Letters
- Country of Publication:
- United States
- Language:
- English
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