Autor(en)
Aubert, B; Karyotakis, Y; P. Lees, J; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V; Garra Tico, J; Grauges, E; Lopezab, L; Palanoab, A; Pappagalloab, M; Eigen, G; Stugu, B; Sun, Luyan; Battaglia, M; N. Brown, D; T. Kerth, L; G. Kolomensky, Yu; Lynch, G; L. Osipenkov, I; Tackmann, K; Tanabe, T; M. Hawkes, C; Soni, N; T. Watson, A; Koch, H; Schroeder, T; J. Asgeirsson, D; G. Fulsom, B; Hearty, C; S. Mattison, T; A. Mckenna, J; Barrett, M; Khan, A; Randle-Conde, A; E. Blinov, V; D. Bukin, A; R. Buzykaev, A; P. Druzhinin, V; B. Golubev, V; P. Onuchin, A; I. Serednyakov, S; I. Skovpen, Yu; P. Solodov, E; Yu. Todyshev, K; Bondioli, M; Curry, S; Eschrich, I; Kirkby, D; J. Lankford, A; Lund, P; Mandelkern, M; C. Martin, E; P. Stoker, D; Abachi, S; Buchanan, C; Atmacan, H; W. Gary, J; Liu, Franklin; Long, O; M. Vitug, G; Yasin, Z; Zhang, L; Sharma, V; Campagnari, C; M. Hong, T; Kovalskyi, D; A. Mazur, M; D. Richman, J; W. Beck, T; M. Eisner, A; Heusch, C.A; Kroseberg, J; S. Lockman, W; J. Martinez, A; Schalk, T; A. Schumm, B; Seiden, A; O. Winstrom, L; H. Cheng, C; Doll, D.A; Echenard, B; Fang, F; G. Hitlin, D; Narsky, I; Piatenko, T; C. Porter, F; Andreassen, R; Mancinelli, G; T. Meadows, B; Mishra, K; D. Sokoloff, M; C. Bloom, P; T. Ford, W; Gaz, A; F. Hirschauer, J; Nagel, M; Nauenberg, U; G. Smith, J
Titel
Improved Measurement of $B^+\to\rho^+\rho^0$ and Determination of the Quark-Mixing Phase Angle $\alpha
Teil von
  • Physical review letters, 2009, Vol.102, p.141802
Ort / Verlag
United States: American Physical Society
Links zum Volltext
Quelle
American Physical Society Journals
Beschreibungen
We present improved measurements of the branching fraction ${\cal B}$, the longitudinal polarization fraction $f_L$, and the direct {\ensuremath{CP}\xspace} asymmetry {\ensuremath{{\cal A}_{CP}}\xspace} in the $B$ meson decay channel $B^+\to\rho^+\rho^0$. The data sample was collected with the {{\slshape B\kern-0.1em{\smaller A}\kern-0.1em B\kern-0.1em{\smaller A\kern-0.2em R}}} detector at SLAC. The results are ${\cal B} (\Bp\ra\rprz)=(23.7\pm1.4\pm1.4)\times10^{-6}$, $f_L=0.950\pm0.015\pm0.006$, and $\Acp=-0.054\pm0.055\pm0.010$, where the uncertainties are statistical and systematic, respectively. Based on these results, we perform an isospin analysis and determine the CKM weak phase angle $\alpha$ to be $(92.4^{+6.0}_{-6.5})^{\circ}$.
Format
Sprache(n)
Englisch
Identifikator(en)
ISSN: 0031-9007
ISSN: 1079-7114
DOI: 10.1103/PhysRevLett.102.141802

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