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Observation of the decay $B^0 \Rightarrow \rho^+ \rho^-$ and measurement of the branching fraction and polarization
Authors :
Aubert, B. Barate, R. Boutigny, D. Gaillard, J.M. Hicheur, A. Karyotakis, Y. Lees, J.P. Robbe, P. Tisserand, V. Zghiche, A. Palano, A. Pompili, A. Chen, J.C. Qi, N.D. Rong, G. Wang, P. Zhu, Y.S. Eigen, G. Ofte, I. Stugu, B. Abrams, G.S. Borgland, A.W. Breon, A.B. Brown, D.N. Button-Shafer, J. Cahn, R.N. Charles, E. Gill, M.S. Gritsan, A.V. Groysman, Y. Jacobsen, R.G. Kadel, R.W. Kadyk, J. Kerth, L.T. Kolomensky, Yu.G. Kral, J.F. Leclerc, C. Levi, M.E. Lynch, G. Mir, L.M. Oddone, P.J. Orimoto, T.J. Pripstein, M. Roe, N.A. Romosan, A. Ronan, M.T. Shelkov, V.G. Telnov, A.V. Wenzel, W.A. Harrison, T.J. Hawkes, C.M. Knowles, D.J. O'Neale, S.W. Penny, R.C. Watson, A.T. Watson, N.K. Deppermann, T. Goetzen, K. Koch, H. Lewandowski, B. Peters, K. Schmuecker, H. Steinke, M. Barlow, N.R. Bhimji, W. Boyd, J.T. Chevalier, N. Clark, P.J. Cottingham, W.N. Mackay, C. Wilson, F.F. Abe, K. Hearty, C. Mattison, T.S. McKenna, J.A. Thiessen, D. Jolly, S. McKemey, A.K. Blinov, V.E. Bukin, A.D. Buzykaev, A.R. Golubev, V.B. Ivanchenko, V.N. Korol, A.A. Kravchenko, E.A. Onuchin, A.P. Serednyakov, S.I. Skovpen, Yu.I. Yushkov, A.N. Best, D. Chao, M. Kirkby, D. Lankford, A.J. Mandelkern, M. McMahon, S. Stoker, D.P. Buchanan, C. Chun, S. Hadavand, H.K. Hill, E.J. MacFarlane, D.B. Paar, H. Prell, S. Rahatlou, S. Raven, G. Sharma, V. Berryhill, J.W. Campagnari, C. Dahmes, B. Hart, P.A. Kuznetsova, N. Levy, S.L. Long, O. Mazur, M.A. Richman, J.D. Verkerke, W. Beringer, J. Eisner, A.M. Grothe, M. Heusch, C.A. Lockman, W.S. Pulliam, T. Schalk, T. Schmitz, R.E. Schumm, B.A. Seiden, A. Turri, M. Walkowiak, W. Williams, D.C. Wilson, M.G. Chen, E. Dubois-Felsmann, G.P. Dvoretskii, A. Hitlin, D.G. Porter, F.C. Ryd, A. Samuel, A. Yang, S. Jayatilleke, S. Mancinelli, G. Meadows, B.T. Sokoloff, M.D. Barillari, T. Bloom, P. Ford, W.T. Nauenberg, U. Olivas, A. Rankin, P. Roy, J. Smith, J.G. Van Hoek, W.C. Zhang, L. Harton, J.L. Hu, T. Krishnamurthy, M. Soffer, A. Toki, W.H. Wilson, R.J. Zhang, J. Altenburg, D. Brandt, T. Brose, J. Colberg, T. Dickopp, M. Dubitzky, R.S. Hauke, A. Maly, E. Muller-Pfefferkorn, R. Otto, S. Schubert, K.R. Schwierz, R. Spaan, B. Wilden, L. Bernard, D. Bonneaud, G.R. Brochard, F. Cohen-Tanugi, J. Grenier, P. Thiebaux, C. Vasileiadis, G. Verderi, M. Anjomshoaa, A. Bernet, R. Khan, A. Lavin, D. Muheim, F. Playfer, S. Swain, J.E. Tinslay, J. Falbo, M. Borean, C. Bozzi, C. Piemontese, L. Sarti, A. Treadwell, E. Anulli, F. Baldini-Ferroli, R. Calcaterra, A. De Sangro, R. Falciai, D. Finocchiaro, G. Patteri, P. Peruzzi, I.M. Piccolo, M. Zallo, A. Bagnasco, S. Buzzo, A. Contri, R. Crosetti, G. Lo Vetere, M. Macri, M. Monge, M.R. Pastore, F.C. Patrignani, C. Robutti, E. Santroni, A. Tosi, S. Bailey, S. Morii, M. Bartoldus, R. Grenier, G.J. Mallik, U. Cochran, J. Crawley, H.B. Lamsa, J. Meyer, W.T. Rosenberg, E.I. Yi, J. Davier, M. Grosdidier, G. Hocker, A. Laplace, S. Le Diberder, F. Lepeltier, V. Lutz, A.M. Petersen, T.C. Plaszczynski, Stéphane Schune, M.H. Tantot, L. Wormser, G. Bionta, R.M. Brigljevic, V. Lange, D.J. Van Bibber, K. Wright, D.M. Bevan, A.J. Fry, J.R. Gabathuler, E. Gamet, R. George, M. Kay, M. Payne, D.J. Sloane, R.J. Touramanis, C. Aspinwall, M.L. Bowerman, D.A. Dauncey, P.D. Egede, U. Eschrich, I. Morton, G.W. Nash, J.A. Sanders, P. Smith, D. Taylor, G.P. Back, J.J. Bellodi, G. Dixon, P. Harrison, P.F. Potter, R.J.L. Shorthouse, H.W. Strother, P. Vidal, P.B. Cowan, G. Flaecher, H.U. George, S. Green, M.G. Kurup, A. Marker, C.E. McMahon, T.R. Ricciardi, S. Salvatore, F. Vaitsas, G. Winter, M.A. Brown, D. Davis, C.L. Allison, J. Barlow, R.J. Forti, A.C. Jackson, F. Lafferty, G.D. Lyon, A.J. Savvas, N. Weatherall, J.H. Williams, J.C. Farbin, A. Jawahery, A. Lillard, V. Roberts, D.A. Schieck, J.R. Blaylock, G. Dallapiccola, C. Flood, K.T. Hertzbach, S.S. Kofler, R. Koptchev, V.B. Moore, T.B. Staengle, H. Willocq, S. Brau, B. Cowan, R. Sciolla, G. Taylor, F. Yamamoto, R.K. Milek, M. Patel, P.M. Palombo, F. Bauer, J.M. Cremaldi, L. Eschenburg, V. Kroeger, R. Reidy, J. Sanders, D.A. Summers, D.J. Hast, C. Taras, P. Nicholson, H. Cavallo, N. De Nardo, G. Fabozzi, F. Gatto, C. Lista, L. Paolucci, P. Piccolo, D. Sciacca, C. LoSecco, J.M. Alsmiller, J.R.G. Gabriel, T.A. Brau, J. Frey, R. Iwasaki, M. Potter, C.T. Sinev, N.B. Strom, D. Torrence, E. Colecchia, F. Dorigo, A. Galeazzi, F. Margoni, M. Morandin, M. Posocco, M. Rotondo, M. Simonetto, F. Stroili, R. Voci, C. Benayoun, M. Briand, H. Chauveau, J. David, P. De La Vaissiere, C. Del Buono, L. Hamon, O. John, M.J.J. Leruste, P. Ocariz, J. Pivk, M. Roos, L. Stark, J. T'Jampens, S. Therin, G. Manfredi, P.F. Re, V. Speziali, V. Gladney, L. Guo, Q.H. Panetta, J. Angelini, C. Batignani, G. Bettarini, S. Bondioli, M. Bucci, F. Calderini, G. Campagna, E. Carpinelli, M. Forti, F. Giorgi, M.A. Lusiani, A. Marchiori, G. Martinez-Vidal, F. Morganti, M. Neri, N. Paoloni, E. Rama, M. Rizzo, G. Sandrelli, F. Triggiani, G. Walsh, J. Haire, M. Judd, D. Paick, K. Turnbull, L. Wagoner, D.E. Albert, J. Danielson, N. Elmer, P. Lu, C. Miftakov, V. Olsen, J. Schaffner, S.F. Smith, A.J.S. Tumanov, A. Varnes, E.W. Bellini, F. Cavoto, G. Del Re, D. Faccini, R. Ferrarotto, F. Ferroni, F. Leonardi, Emilio Morganti, S. Piredda, G. Safai Tehrani, F. Serra, M. Voena, C. Christ, S. Wagner, G. Waldi, R. Adye, T. De Groot, N. Franek, B. Geddes, N.I. Gopal, G.P. Xella, S.M. Aleksan, R. Emery, S. Gaidot, A. Ganzhur, P.F. Giraud S.F. Hamel De Monchenault, G. Kozanecki, W. Langer, M. Legendre, M. London, G.W. Mayer, B. Schott, G. Vasseur, G. Yeche, C. Zito, M. Purohit, M.V. Weidemann, A.W. Yumiceva, F.X. Adam, I. Aston, D. Berger, N. Boyarski, A.M. Convery, M.R. Coupal, D.P. Dong, D. Dorfan, J. Dunwoodie, W. Field, R.C. Glanzman, T. Gowdy, S.J. Grauges, E. Haas, T. Hadig, T. Halyo, V. Himel, T. Hrynova, T. Huffer, M.E. Innes, W.R. Jessop, C.P. Kelsey, M.H. Kim, P. Kocian, M.L. Langenegger, U. Leith, D.W.G.S. Luitz, S. Luth, V. Lynch, H.L. Marsiske, H. Menke, S. Messner, R. Muller, D.R. O'Grady, C.P. Ozcan, V.E. Perazzo, A. Perl, M. Petrak, S. Quinn, H. Ratcliff, B.N. Robertson, S.H. Roodman, A. Salnikov, A.A. Schietinger, T. Schindler, R.H. Schwiening, J. Simi, G. Snyder, A. Soha, A. Spanier, S.M. Stelzer, J. Su, D. Sullivan, M.K. Tanaka, H.A. Vavra, J. Wagner, S.R. Weaver, M. Weinstein, A.J.R. Wisniewski, W.J. Wright, D.H. Young, C.C. Burchat, P.R. Cheng, C.H. Meyer, T.I. Roat, C. Henderson, R. Bugg, W. Cohn, H. Izen, J.M. Kitayama, I. Lou, X.C. Bianchi, F. Bona, M. Gamb, D. Bosisio, L. Della Ricca, G. Dittongo, S. Lanceri, L. Poropat, P. Vitale, L. Vuagnin, G. Panvini, R.S. Banerjee, S. Brown, C.M. Fortin, D. Jackson, P.D. Kowalewski, R. Roney, J.M. Band, H.R. Dasu, S. Datta, M. Eichenbaum, A.M. Hu, H. Johnson, J.R. Liu, R. Di Lodovico, F. Mohapatra, A. Pan, Y. Prepost, R. Scott, I.J. Sekula, S.J. Von Wimmersperg-Toeller, J.H. Wu, J. Wu, S.L. Yu, Z. Neal, H. Laboratoire d'Annecy de Physique des Particules (LAPP) Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS) Laboratoire Leprince-Ringuet (LLR) Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3) Laboratoire de l'Accélérateur Linéaire (LAL) Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11) Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE) Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS) BABAR
Source :
Physical Review D, Physical Review D, American Physical Society, 2004, 69, pp.031102
Publication Year :
2004
Publisher :
HAL CCSD, 2004.
Abstract
We have observed the rare decay B0 => rho+ rho- in a sample of 89 million BB pairs recorded with the BABAR detector. The number of observed events is 88 +23-21 +-9, with a significance of 5.1 standard deviations with systematic uncertainties included. The branching fraction and the longitudinal polarization are measured to be BR(B0 => rho+ rho-) = (25 +7-6 +5-6)*10^{-6} and Gamma_L/Gamma = 0.98 +0.02-0.08 +-0.03, respectively.
Details
Language :
English
ISSN :
15507998 and 15502368
Database :
OpenAIRE
Journal :
Physical Review D, Physical Review D, American Physical Society, 2004, 69, pp.031102
Accession number :
edsair.dedup.wf.001..6abd17cc284b2aeed1c93cb566fddb2e