Measurement of the Forward-Backward Asymmetry in the B-->K[superscript (*)]mu+mu- Decay and First Observation of the Bs[superscript 0]-->phimu+mu- Decay
Name
Aaltonen-2011-Measurement of the F.pdf
Size
283.21 KB
Format
Adobe PDF
Checksum (MD5)
65fd4c75a52b50f8b62195225f1e2ba9
Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Paus, Christoph M. E.
Bauer, Gerry P
Makhoul, Khaldoun
Alternative Title
Measurement of the Forward-Backward Asymmetry in the B→K(*)μ+μ- Decay and First Observation of the Bs0→ϕμ+μ- Decay
Date Issued
April 2011
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
T. Aaltonen et al. (CDF Collaboration). "Measurement of the Forward-Backward Asymmetry in the B-->K[superscript (*)]mu+mu- Decay and First Observation of the Bs[superscript 0]-->phimu+mu- Decay." Phys. Rev. Lett. 106, 161801 (2011) [7 pages] © 2011 American Physical Society.
Version
Final published version
Abstract
We reconstruct the rare decays B+-->K+mu+mu-, B0-->K*(892)0mu+mu-, and Bs0-->phi(1020)mu+mu- in a data sample corresponding to 4.4 fb-1 collected in pp[over-bar] collisions at [sqrt]s=1.96 TeV by the CDF II detector at the Tevatron Collider. Using 121±16 B+-->K+mu+mu- and 101±12 B0-->K*0mu+mu- decays we report the branching ratios. In addition, we report the differential branching ratio and the muon forward-backward asymmetry in the B+ and B0 decay modes, and the K*0 longitudinal polarization fraction in the B0 decay mode with respect to the squared dimuon mass. These are consistent with the predictions, and most recent determinations from other experiments and of comparable accuracy. We also report the first observation of the Bs0-->phimu+mu- decay and measure its branching ratio BR(Bs0-->phimu+mu-)=[1.44±0.33±0.46]×10-6 using 27±6 signal events. This is currently the most rare Bs0 decay observed.
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
https://doi.org/10.1103/PhysRevLett.106.161801
