We present results on time-dependent CP asymmetries in neutral B decays to several CP eigenstates. The measurements use a data sample of about 227x10(6) Upsilon(4S)-> B (B) over bar decays collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. The amplitude of the CPasymmetry, sin2 beta in the standard model, is derived from decay-time distributions from events in which one neutral B meson is fully reconstructed in a final state containing a charmonium meson and the other B meson is determined to be either a B-0 or <<(B)over bar>(0) from its decay products. We measure sin2 beta=0.722 +/- 0.040(stat)+/- 0.023(syst) in agreement with the standard model expectation.
Improved measurement of CP asymmetries in B-0 ->(c(c)over-bar)K0((*)) decays / G.B. Aubert, R. Barate, D. Boutigny, F. Couderc, J.M. Gaillard, A. Hicheur, Y. Karyotakis, J.P. Lees, V. Tisserand, A. Zghiche, A. Palano, A. Pompili, J. C. Chen, N.D. Qi, G. Rong, P.Wang, Y.S. Zhu, G. Eigen, I. Ofte, B. Stugu, G.S. Abrams, A.W. Borgland, A.B. Breon, D.N. Brown, J. Button-Shafer, R.N. Cahn, E. Charles, C.T. Day, M.S. Gill, A.V. Gritsan, Y. Groysman, R.G. Jacobsen, R.W. Kadel, J. Kadyk, L.T. Kerth, Y.G. Kolomensky, G. Kukartsev, G. Lynch, L. M. Mir, P.J. Oddone, T.J. Orimoto, M. Pripstein, N.A. Roe, M.T. Ronan, V.G. Shelkov, W.A. Wenzel, M. Barrett, K.E. Ford, T.J. Harrison, A.J. Hart, C. M. Hawkes, S.E. Morgan, A.T. Watson, M. Fritsch, K. Goetzen, T. Held, H. Koch, B. Lewandowski, M. Pelizaeus, M. Steinke, J. T. Boyd, N. Chevalier, W.N. Cottingham, M.P. Kelly, T.E. Latham, F.F. Wilson, T. Cuhadar-Donszelmann, C. Hearty, N.S. Knecht, T.S. Mattison, J.A. McKenna, D. Thiessen, A. Khan, P. Kyberd, L. Teodorescu, A.E. Blinov, V.E. Blinov, V.P. Druzhinin, V. B. Golubev, V.N. Ivanchenko, E.A. Kravchenko, A.P. Onuchin, S.I. Serednyakov, Y.I. Skovpen, E.P. Solodov, A. N. Yushkov, D. Best, M. Bruinsma, M. Chao, I. Eschrich, D. Kirkby, A.J. Lankford, M. Mandelkern, R.K. Mommsen, W. Roethel, D.P. Stoker, C. Buchanan, B.L. Hartfiel, S. D. Foulkes, J.W. Gary, B.C. Shen, K. Wang, D. del Re, H.K. Hadavand, E.J. Hill, D.B. MacFarlane, H.P. Paar, S. Rahatlou, V. Sharma, J.W. Berryhill, C. Campagnari, B. Dahmes, O. Long, A. Lu, M.A. Mazur, J.D. Richman, W. Verkerke, T.W. Beck, A.M. Eisner, C.A. Heusch, J. Kroseberg, W.S. Lockman, G. Nesom, T. Schalk, B. A. Schumm, A. Seiden, P. Spradlin, D.C. Williams, M.G. Wilson, J. Albert, E. Chen, G.P. Dubois-Felsmann, A. Dvoretskii, D.G. Hitlin, I. Narsky, T. Piatenko, F.C. Porter, A. Ryd, A. Samuel, S. Yang, S. Jayatilleke, G. Mancinelli, B.T. Meadows, M. D. Sokoloff, T. Abe, F. Blanc, P. Bloom, S. Chen, W.T. Ford, U. Nauenberg, A. Olivas, P. Rankin, J.G. Smith, J. Zhang, L. Zhang, A. Chen, J.L. Harton, A. Soffer, W.H. Toki, R.J. Wilson, Q. Zeng, D. Altenburg, T. Brandt, J. Brose, M. Dickopp, E. Feltresi, A. Hauke, H. M. Lacker, R. Muller-Pfefferkorn, R. Nogowski, S. Otto, A. Petzold, J. Schubert, K.R. Schubert, R. Schwierz, B. Spaan, J.E. Sundermann, D. Bernard, G.R. Bonneaud, F. Brochard, P. Grenier, S. Schrenk, C. Thiebaux, G. Vasileiadis, M. Verderi, D.J. Bard, P.J. Clark, D. Lavin, F. Muheim, S. Playfer, Y. Xie, M. Andreotti, V. Azzolini, D. Bettoni, C. Bozzi, R. Calabrese, G. Cibinetto, E. Luppi, M. Negrini, L. Piemontese, A. Sarti, E. Treadwell, F. Anulli, R. Baldini-Ferroli, A. Calcaterra, R. de Sangro, G. Finocchiaro, P. Patteri, I.M. Peruzzi, M. Piccolo, A. Zallo, A. Buzzo, R. Capra, R. Contri, G. Crosetti, M. Lo Vetere, M. Macri, M.R. Monge, S. Passaggio, C. Patrignani, E. Robutti, A. Santroni, S. Tosi, S. Bailey, G. Brandenburg, K.S. Chaisanguanthum, M. Morii, E. Won, R.S. Dubitzky, U. Langenegger, W. Bhimji, D.A. Bowerman, P.D. Dauncey, U. Egede, J.R. Gaillard, G.W. Morton, J.A. Nash, M.B. Nikolich, G.P. Taylor, M.J. Charles, G.J. Grenier, U. Mallik, J. Cochran, H.B. Crawley, J. Lamsa, W.T. Meyer, S. Prell, E.I. Rosenberg, A.E. Rubin, J. Yi, M. Biasini, R. Covarelli, M. Pioppi, M. Davier, X. Giroux, G. Grosdidier, A. Hocker, S. Laplace, F. Le Diberder, V. Lepeltier, A.M. Lutz, T.C. Petersen, S. Plaszczynski, M.H. Schune, L. Tantot, G. Wormser, C.H. Cheng, D.J. Lange, M.C. Simani, D.M. Wright, A.J. Bevan, C.A. Chavez, J.P. Coleman, I.J. Forster, J.R. Fry, E. Gabathuler, R. Gamet, D.E. Hutchcroft, R.J. Parry, D.J. Payne, R. J. Sloane, C. Touramanis, J.J. Back, C.M. Cormack, P.F. Harrison, F. Di Lodovico, G.B. Mohanty, C.L. Brown, G. Cowan, R.L. Flack, H.U. Flaecher, M.G. Green, P.S. Jackson, T.R. McMahon, S. Ricciardi, F. Salvatore, M. A. Winter, D. Brown, C.L. Davis, J. Allison, N.R. Barlow, R.J. Barlow, P.A. Hart, M.C. Hodgkinson, G.D. Lafferty, A.J. Lyon, J.C. Williams, A. Farbin, W.D. Hulsbergen, A. Jawahery, D. Kovalskyi, C.K. Lae, V. Lillard, D.A. Roberts, G. Blaylock, C. Dallapiccola, K.T. Flood, S.S. Hertzbach, R. Kofler, V.B. Koptchev, T.B. Moore, S. Saremi, H. Staengle, S. Willocq, R. Cowan, G. Sciolla, S.J. Sekula, F. Taylor, R.K. Yamamoto, D.J.J. Mangeol, P.M. Patel, S.H. Robertson, A. Lazzaro, V. Lombardo, F. Palombo. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 94:16(2005 Apr 29), pp. 161803.1-161803.7.
Improved measurement of CP asymmetries in B-0 ->(c(c)over-bar)K0((*)) decays
A. Lazzaro;V. Lombardo;F. Palombo
2005
Abstract
We present results on time-dependent CP asymmetries in neutral B decays to several CP eigenstates. The measurements use a data sample of about 227x10(6) Upsilon(4S)-> B (B) over bar decays collected by the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. The amplitude of the CPasymmetry, sin2 beta in the standard model, is derived from decay-time distributions from events in which one neutral B meson is fully reconstructed in a final state containing a charmonium meson and the other B meson is determined to be either a B-0 or <<(B)over bar>(0) from its decay products. We measure sin2 beta=0.722 +/- 0.040(stat)+/- 0.023(syst) in agreement with the standard model expectation.
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
