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Measurements of branching fractions, rate asymmetries, and angular distributions in the rare decays B -> Kl(+)l(-) and B -> K(*)l(+)l(-)
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BaBar Collaboration (Including:
). (2006) Measurements of branching fractions, rate asymmetries, and angular distributions in the rare decays B -> Kl(+)l(-) and B -> K(*)l(+)l(-). Physical Review D (Particles, Fields, Gravitation and Cosmology), Vol.73 (No.9). Article: 092001. doi:10.1103/PhysRevD.73.092001 ISSN 1550-7998.Research output not available from this repository.
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Official URL: http://dx.doi.org/10.1103/PhysRevD.73.092001
Abstract
We present measurements of the flavor-changing neutral current decays B -> K center dot(+)center dot(-) and B -> K-*center dot(+)center dot(-), where center dot(+)center dot(-) is either an e(+)e(-) or mu(+)mu(-) pair. The data sample comprises 229x10(6) Upsilon(4S)-> B (B) over bar decays collected with the BABAR detector at the PEP-II e(+)e(-) storage ring. Flavor-changing neutral current decays are highly suppressed in the standard model and their predicted properties could be significantly modified by new physics at the electroweak scale. We measure the branching fractions B(B -> K center dot(+)center dot(-))=(0.34 +/- 0.07 +/- 0.02)x10(-6), B(B -> K-*center dot(+)center dot(-))=(0.78(-0.17)(+0.19)+/- 0.11)x10(-6), the direct CP asymmetries of these decays, and the relative abundances of decays to electrons and muons. For two regions in center dot(+)center dot(-) mass, above and below m(J/psi), we measure partial branching fractions and the forward-backward angular asymmetry of the lepton pair. In these same regions we also measure the K-* longitudinal polarization in B -> K-*center dot(+)center dot(-) decays. Upper limits are obtained for the lepton-flavor-violating decays B -> Ke mu and B -> K(*)e mu. All measurements are consistent with standard model expectations.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Physical Review D (Particles, Fields, Gravitation and Cosmology) | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 1550-7998 | ||||
| Official Date: | May 2006 | ||||
| Dates: |
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| Volume: | Vol.73 | ||||
| Number: | No.9 | ||||
| Number of Pages: | 18 | ||||
| Page Range: | Article: 092001 | ||||
| DOI: | 10.1103/PhysRevD.73.092001 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
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