Improved measurement of the Cabibbo-Kobayashi-Maskawa angle α using B0(B)→p+p- decays

We present results from an analysis of B0(B¯¯¯0)→ρ+ρ− using 232×106 Υ(4S)→BB¯¯¯ decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at SLAC. We measure the longitudinal polarization fraction fL=0.978±0.014(stat)+0.021−0.029(syst) and the CP-violating parameters SL=−0.3...

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Hauptverfasser:	Ahmed, M, Azzolini, V, Band, H. R, Bard, D. J, Barlow, N. R, Berryhill, J. W, Bhimji, W, Bona, Marcella, Brandenburg, G, Briand, H, Brose, J, Brown, C. M, Bruinsma, M, Brunet, S, Bugg, W, Buzzo, A, Cahn, R. N, Capra, R, Charles, E, Chen, Anping, Chen, C, Chen, E, Chevalier, N, Cote, D, Covarelli, R, D'Orazio, A, Dahmes, B, Dauncey, Paul D, De Groot, N, Del Buono, L, Druzhinin, V. P, Eckhart, E. A, Edwards, A. J, Egede, Ulrik, Ferrarotto, F, Flack, R. L, Ford, K. E, Galeazzi, F, Gladney, L, Golubev, V. B, Gowdy, S. J, Hamano, K, Hertzbach, Stanley S, Hollar, J. J, Honscheid, K, Hufnagel, D, Kagan, H, Klose, V, Koeneke, K, Kovalskyi, D, Kowalewski, Robert V, Lees, J. P, Luppi, E, Lusiani, A, Lutz, A. M, MacFarlane, D. B, Macri, M, Mandelkern, M, Mazzoni, M. A, Messner, R, Mohapatra, A. K, O'Grady, C. P, Palombo, F, Pelizaeus, M, Peruzzi, I. M, Petersen, B. A, Polci, F, Posocco, M, Potter, C. T, Rahatlou, Sh, Raven, G, Richman, J. D, Ritchie, J. L, Rizzo, G, Ronan, M. T, Rotondo, M, Ruddick, W. O, Salvatore, F, Schroeder, T, Schune, M. H, Schwierz, R, Skovpen, Yu. I, Smith, James G, Snyder, A, Steinke, M, Stoker, D. P, Stroili, R, Thompson, J. M, Ulmer, K. A, Uwer, U, Vuagnin, G, Wagner, S. R, Waldi, R, Weaver, M, Won, E, Wormser, G, Wright, D. M, Yushkov, A. N, Zghiche, A, BaBar Collaboration
Format:	Artikel
Sprache:	eng
Schlagworte:	Annihilation CKM matrix Colliding beams Electron positron Electroproduction Hadronic decay Isospin Pair production Upsilon
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