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Measurements of branching fractions, polarizations, and direct CP-violation asymmetries in B[superscript +]-->ρ[superscript 0]K[superscript *+] and B[superscript +]-->f0(980)K[superscript*+] decays

Author(s)
Dujmic, Denis; Sciolla, Gabriella; Zhao, M.; Cowan, Ray F
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Alternative title
Measurements of branching fractions, polarizations, and direct CP-violation asymmetries in B+→ρ0K*+ and B+→f0(980)K*+ decays
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
We present measurements of the branching fractions, longitudinal polarization, and direct CP-violation asymmetries for the decays B+→ρ0K*+ and B+→f0(980)K*+ with a sample of (467±5)×106BB̅ pairs collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at the SLAC National Accelerator Laboratory. We observe B+→ρ0K*+ with a significance of 5.3σ and measure the branching fraction B(B+→ρ0K*+)=(4.6±1.0±0.4)×10-6, the longitudinal polarization fL=0.78±0.12±0.03, and the CP-violation asymmetry ACP=0.31±0.13±0.03. We observe B+→f0(980)K*+ and measure the branching fraction B(B+→f0(980)K*+)×B(f0(980)→π+π-)=(4.2±0.6±0.3)×10-6 and the CP-violation asymmetry ACP=-0.15±0.12±0.03. The first uncertainty quoted is statistical and the second is systematic.
Date issued
2011-03
URI
http://hdl.handle.net/1721.1/65938
Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review D
Publisher
American Physical Society
Citation
del Amo Sanchez, P. et al. (The BABAR Collaboration). "Measurements of branching fractions, polarizations, and direct CP-violation asymmetries in B[superscript +]-->ρ[superscript 0]K[superscript *+] and B[superscript +]-->f0(980)K[superscript*+] decays." Phys. Rev. D 83, 051101(R) (2011) [8 pages] © 2011 American Physical Society.
Version: Final published version
ISSN
1550-7998
1550-2368

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