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Direct CP, lepton flavor, and isospin asymmetries in the decays B -> K((*))l(+)l(-)
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BaBar Collaboration (Including:
). (2009) Direct CP, lepton flavor, and isospin asymmetries in the decays B -> K((*))l(+)l(-). Physical Review Letters, Vol.102 (No.9). article no. 091803. doi:10.1103/PhysRevLett.102.091803 Research output not available from this repository, contact author.
Official URL: http://dx.doi.org/10.1103/PhysRevLett.102.091803
Abstract
We measure branching fractions and integrated rate asymmetries for the rare decays B -> K((*))l(+)l(-), where l(+)l(-) is either e(+)e(-) or mu(+)mu(-), using a sample of 384x10(6) BB events collected with the BABAR detector at the PEP-II e(+)e(-) collider. We find no evidence for direct CP or lepton-flavor asymmetries. However, for dilepton masses below the J/psi resonance, we find evidence for unexpectedly large isospin asymmetries in both B -> Kl(+)l(-) and B -> K(*)l(+)l(-) which differ, respectively, by 3.2 sigma and 2.7 sigma, including systematic uncertainties, from the standard model expectations.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science > Physics | ||||
| Journal or Publication Title: | Physical Review Letters | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 0031-9007 | ||||
| Official Date: | 6 March 2009 | ||||
| Dates: |
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| Volume: | Vol.102 | ||||
| Number: | No.9 | ||||
| Number of Pages: | 7 | ||||
| Page Range: | article no. 091803 | ||||
| DOI: | 10.1103/PhysRevLett.102.091803 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Funder: | DOE and NSF (U.S.), NSERC ( Canada), CEA and CNRS-IN2P3 ( France), BMBF and DFG ( Germany), INFN ( Italy), FOM ( The Netherlands) |
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