Direct CP, Lepton Flavor, and Isospin Asymmetries in the Decays B-->K(*)l+l-
Name
Aubert-2009-Direct CP, Lepton Fl.pdf
Size
246.06 KB
Format
Adobe PDF
Checksum (MD5)
9dc03c66027461198bf0dd480d2fbd58
Author(s)
Cowan, Ray Franklin
Spitznagel, M.
Sciolla, Gabriella
Fisher, Peter H.
Koeneke, Karsten
Taylor, Frank E.
Dujmic, Denis
Yamamoto, R. K.
Zhao, M.
Date Issued
March 2009
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aubert, B. et al. “Direct CP, Lepton Flavor, and Isospin Asymmetries in the Decays B-->K(*)l+l-.” Physical Review Letters 102.9 (2009): 091803. © 2009 The American Physical Society.
Version
Final published version
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 μ+μ-, using a sample of 384×10(6) BB̅ 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/ψ resonance, we find evidence for unexpectedly large isospin asymmetries in both B→Kl+l- and B→K*l+l- which differ, respectively, by 3.2σ and 2.7σ, including systematic uncertainties, from the standard model expectations.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
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.
Persistent DSpace Link
DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.102.091803
