Improved Measurements of Branching Fractions for B0 -> pi+pi-, K+pi-, and Search for B0 -> K+K [electronic resource].
- Published:
- Washington, D.C. : United States. Dept. of Energy, 2005.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description:
- 15 pages : digital, PDF file
- Additional Creators:
- Stanford Linear Accelerator Center
United States. Department of Energy
United States. Department of Energy. Office of Scientific and Technical Information - Access Online:
- www.osti.gov
- Summary:
- We present preliminary measurements of branching fractions for the charmless two-body decays B° → π⁺π⁻ and K⁺π⁻, and a search for B° → K⁺K⁻ using a data sample of approximately 227 million B{bar B} decays. Signal yields are extracted with a multi-dimensional maximum likelihood fit, and the efficiency is corrected for the effects of final-state radiation. We find the charge-averaged branching fractions (in units of 10⁻⁶): Β(B° → π⁺π⁻) = 5.5 ± 0.4 ± 0.3; Β(B° → K⁺π⁻) = 19.2 ± 0.6 ± 0.6; and Β(B° → K⁺K⁻) = < 0.40. The errors are statistical followed by systematic, and the upper limit on K⁺K⁻ represents a confidence level of 90%.
- Subject(s):
- Note:
- Published through SciTech Connect.
09/28/2005.
"slac-pub-11433"
"hep-ex/0508046"
Presented at EPS International Europhysics Conference on High Energy Physics (HEP-EPS 2005), Lisbon, Portugal, 21-27 Jul 2005.
Chen, J.C.; Lees, J.P.; Wang, P.; Aubert, B.; Boutigny, D.; Karyotakis, Y.; Poireau, V.; Tisserand, V.; Zghiche, A.; Grauges, E.; Pappagallo, M.; Eigen, G.; Stugu, B. /Bergen U. /LBL, Berkeley /UC,; Zhu, Y.S.; Rong, G.; Qi, N.D.; Barate, R.; Pompili, A.; Couderc, F.; Ofte, I.; Palano, A. - Funding Information:
- AC02-76SF00515
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