TY - JOUR
T1 - Direct CP, Lepton Flavor and Isospin Asymmetries in the Decays B->K(*)l+l-
AU - Aubert, B.
AU - Playfer, Stephen
AU - The BaBar Collaboration
AU - Clark, Philip
N1 - 7 pages, 3 postscript figures, final version accpeted by PRL; includes EPAPS supplemental material giving full branching fraction results
PY - 2008/7/25
Y1 - 2008/7/25
N2 - We measure rate asymmetries for the rare decays B->K(*)l+l-, where l+l- is either e+e- or mu+mu-, using a sample of 384 million BBbar events collected with the Babar detector at the PEP-II e+e- collider. We find no evidence for direct CP or lepton-flavor asymmetries. 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.
AB - We measure rate asymmetries for the rare decays B->K(*)l+l-, where l+l- is either e+e- or mu+mu-, using a sample of 384 million BBbar events collected with the Babar detector at the PEP-II e+e- collider. We find no evidence for direct CP or lepton-flavor asymmetries. 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.
KW - hep-ex
UR - http://www.scopus.com/inward/record.url?scp=63149197776&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.102.091803
DO - 10.1103/PhysRevLett.102.091803
M3 - Article
SN - 1079-7114
VL - 102
JO - Physical Review Letters
JF - Physical Review Letters
IS - 9
M1 - 091803
ER -