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Título: | Evidence for B+ -> (K)over-bar*K-0*(+) |
Autor: | Babar Collaboration; Azzolini, Virginia; López-March, Neus CSIC; Martínez-Vidal, Fernando CSIC ORCID; Milanés, Diego A. CSIC ORCID; Oyanguren, Arantza CSIC ORCID; Aubert, B. | Fecha de publicación: | 19-mar-2009 | Editor: | American Physical Society | Citación: | Physical Review - Section D - Particles and Fields 79 (5): 051102 (2009) | Resumen: | We present measurements of the branching fraction and fraction of longitudinal polarization for the decay B+ -> K*0bar K*+ with a sample of 467 +/- 5 million BBbar pairs collected with the BaBar detector at the PEP-II asymmetric-energy e+e- collider at the SLAC National Accelerator Laboratory. We obtain the branching fraction Br(B+ -> K*0bar K*+) = (1.2 +/- 0.5 +/- 0.1) x 10^{-6} with a significance of 3.7 standard deviations including systematic uncertainties. We measure the fraction of longitudinal polarization f_L = 0.75+0.16-0.26 +/- 0.03. The first error quoted is statistical and the second is systematic. | Versión del editor: | http://dx.doi.org/ 10.1103/PhysRevD.79.051102 | URI: | http://hdl.handle.net/10261/21999 | DOI: | 10.1103/PhysRevD.79.051102 | ISSN: | 1550-7998 |
Aparece en las colecciones: | (IFIC) Artículos |
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evidence for B.pdf | 231,8 kB | Adobe PDF | Visualizar/Abrir |
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