Search for the decay B0-->gammagamma.
Physical review letters 87:24 (2001) 241803
Authors:
B Aubert, D Boutigny, JM Gaillard, A Hicheur, Y Karyotakis, JP Lees, P Robbe, V Tisserand, A Palano, GP Chen, JC Chen, ND Qi, G Rong, P Wang, YS Zhu, G Eigen, PL Reinertsen, B Stugu, B Abbott, GS Abrams, AW Borgland, AB Breon, DN Brown, J Button-Shafer, RN Cahn, AR Clark, MS Gill, A Gritsan, Y Groysman, RG Jacobsen, RW Kadel, J Kadyk, LT Kerth, S Kluth, YG Kolomensky, JF Kral, C LeClerc, ME Levi, T Liu, G Lynch, AB Meyer, M Momayezi, PJ Oddone, A Perazzo, M Pripstein, NA Roe, A Romosan, MT Ronan, VG Shelkov, AV Telnov, WA Wenzel, PG Bright-Thomas, TJ Harrison, CM Hawkes, DJ Knowles, SW O'Neale, RC Penny, AT Watson, NK Watson, T Deppermann, K Goetzen, H Koch, J Krug, M Kunze, B Lewandowski, K Peters, H Schmuecker, M Steinke, JC Andress, NR Barlow, W Bhimji, N Chevalier, PJ Clark, WN Cottingham, N De Groot, N Dyce, B Foster, JD McFall, D Wallom, FF Wilson, K Abe, C Hearty, TS Mattison, JA McKenna, D Thiessen, S Jolly, AK McKemey, J Tinslay, VE Blinov, AD Bukin, DA Bukin, AR Buzykaev, VB Golubev, VN Ivanchenko, AA Korol, EA Kravchenko, AP Onuchin, AA Salnikov, SI Serednyakov, YI Skovpen, VI Telnov, AN Yushkov, D Best, AJ Lankford, M Mandelkern, S McMahon, DP Stoker, A Ahsan, K Arisaka, C Buchanan, S Chun, JG Branson, DB MacFarlane, S Prell, S Rahatlou, G Raven, V Sharma, C Campagnari, B Dahmes, PA Hart, N Kuznetsova, SL Levy, O Long, A Lu, JD Richman, W Verkerke, M Witherell, S Yellin, J Beringer, DE Dorfan, AM Eisner, A Frey, AA Grillo, M Grothe, CA Heusch, RP Johnson, W Kroeger, WS Lockman, T Pulliam, H Sadrozinski, T Schalk, RE Schmitz, BA Schumm, A Seiden, M Turri, W Walkowiak, DC Williams, MG Wilson, E Chen, GP Dubois-Felsmann, A Dvoretskii, DG Hitlin, S Metzler, J Oyang, FC Porter, A Ryd, A Samuel, M Weaver, S Yang, RY Zhu, S Devmal, TL Geld, S Jayatilleke, G Mancinelli, BT Meadows, MD Sokoloff, T Barillari, P Bloom, MO Dima, S Fahey, WT Ford, DR Johnson, U Nauenberg, A Olivas, H Park, P Rankin, J Roy, S Sen, JG Smith, WC van Hoek, DL Wagner, J Blouw, JL Harton, M Krishnamurthy, A Soffer, WH Toki, RJ Wilson, J Zhang, T Brandt, J Brose, T Colberg, G Dahlinger, M Dickopp, RS Dubitzky, E Maly, R Müller-Pfefferkorn, S Otto, KR Schubert, R Schwierz, B Spaan, L Wilden, L Behr, D Bernard, GR Bonneaud, F Brochard, J Cohen-Tanugi, S Ferrag, E Roussot, S T'Jampens, C Thiebaux, G Vasileiadis, M Verderi, A Anjomshoaa, R Bernet, A Khan, F Muheim, S Playfer, JE Swain, M Falbo, C Borean, C Bozzi, S Dittongo, M Folegani, L Piemontese, E Treadwell, F Anulli, R Baldini-Ferroli, A Calcaterra, R de Sangro, D Falciai, G Finocchiaro, P Patteri, IM Peruzzi, M Piccolo, Y Xie, A Zallo, S Bagnasco, A Buzzo, R Contri, G Crosetti, P Fabbricatore, S Farinon, M Lo Vetere, M Macri, MR Monge, R Musenich, M Pallavicini, R Parodi, S Passaggio, FC Pastore, C Patrignani, MG Pia, C Priano, E Robutti, A Santroni, M Morii, R Bartoldus, T Dignan, R Hamilton, U Mallik, J Cochran, HB Crawley, PA Fischer, J Lamsa, WT Meyer, EI Rosenberg, M Benkebil, G Grosdidier, C Hast, A Höcker, HM Lacker, S Laplace, V Lepeltier, AM Lutz, S Plaszczynski, MH Schune, S Trincaz-Duvoid, A Valassi, G Wormser, RM Bionta, V Brigljević, DJ Lange, M Mugge, X Shi, K van Bibber, TJ Wenaus, DM Wright, CR Wuest, M Carroll, JR Fry, E Gabathuler, R Gamet, M George, M Kay, DJ Payne, RJ Sloane, C Touramanis, ML Aspinwall, DA Bowerman, PD Dauncey, U Egede, I Eschrich, NJ Gunawardane, JA Nash, P Sanders, D Smith, DE Azzopardi, JJ Back, P Dixon, PF Harrison, RJ Potter, HW Shorthouse, P Strother, PB Vidal, MI Williams, G Cowan, S George, MG Green, A Kurup, CE Marker, P McGrath, TR McMahon, S Ricciardi, F Salvatore, I Scott, G Vaitsas, D Brown, CL Davis, J Allison, RJ Barlow, JT Boyd, AC Forti, J Fullwood, F Jackson, GD Lafferty, N Savvas, ET Simopoulos, JH Weatherall, A Farbin, A Jawahery, V Lillard, J Olsen, DA Roberts, JR Schieck, G Blaylock, C Dallapiccola, KT Flood, SS Hertzbach, R Kofler, TB Moore, H Staengle, S Willocq, B Brau, R Cowan, G Sciolla, F Taylor, RK Yamamoto, M Milek, PM Patel, J Trischuk, F Lanni, F Palombo, JM Bauer, M Booke, L Cremaldi, V Eschenburg, R Kroeger, J Reidy, DA Sanders, DJ Summers, JP Martin, JY Nief, R Seitz, P Taras, V Zacek, H Nicholson, CS Sutton, C Cartaro, N Cavallo, G De Nardo, F Fabozzi, C Gatto, L Lista, P Paolucci, D Piccolo, C Sciacca, JM LoSecco, JR Alsmiller, TA Gabriel, T Handler, J Brau, R Frey, M Iwasaki, NB Sinev, D Strom, F Colecchia, F Dal Corso, A Dorigo, F Galeazzi, M Margoni, G Michelon, M Morandin, M Posocco, M Rotondo, F Simonetto, R Stroili, E Torassa, C Voci, M Benayoun, H Briand, J Chauveau, P David, C de la Vaissière, L Del Buono, O Hamon, F Le Diberder, P Leruste, J Lory, L Roos, J Stark, S Versillé, PF Manfredi, V Re, V Speziali, ED Frank, L Gladney, QH Guo, JH Panetta, C Angelini, G Batignani, S Bettarini, M Bondioli, M Carpinelli, F Forti, MA Giorgi, A Lusiani, F Martinez-Vidal, M Morganti, N Neri, E Paoloni, M Rama, G Rizzo, F Sandrelli, G Simi, G Triggiani, J Walsh, M Haire, D Judd, K Paick, L Turnbull, DE Wagoner, J Albert, C Bula, P Elmer, C Lu, KT McDonald, V Miftakov, SF Schaffner, AJ Smith, A Tumanov, EW Varnes, G Cavoto, D del Re, R Faccini, F Ferrarotto, F Ferroni, K Fratini, E Lamanna, E Leonardi, MA Mazzoni, S Morganti, G Piredda, F Safai Tehrani, M Serra, C Voena, S Christ, R Waldi, T Adye, B Franek, NI Geddes, GP Gopal, SM Xella, R Aleksan, G De Domenico, S Emery, A Gaidot, SF Ganzhur, PF Giraud, G Hamel de Monchenault, W Kozanecki, M Langer, GW London, B Mayer, B Serfass, G Vasseur, C Yèche, M Zito, N Copty, MV Purohit, H Singh, FX Yumiceva, I Adam, PL Anthony, D Aston, K Baird, E Bloom, AM Boyarski, F Bulos, G Calderini, R Claus, MR Convery, DP Coupal, DH Coward, J Dorfan, M Doser, W Dunwoodie, RC Field, T Glanzman, GL Godfrey, SJ Gowdy, P Grosso, T Himel, ME Huffer, WR Innes, CP Jessop, MH Kelsey, P Kim, ML Kocian, U Langenegger, DW Leith, S Luitz, V Luth, HL Lynch, H Marsiske, S Menke, R Messner, KC Moffeit, R Mount, DR Muller, CP O'Grady, M Perl, S Petrak, H Quinn, BN Ratcliff, SH Robertson, LS Rochester, A Roodman, T Schietinger, RH Schindler, J Schwiening, VV Serbo, A Snyder, A Soha, SM Spanier, J Stelzer, D Su, MK Sullivan, HA Tanaka, J Va'vra, SR Wagner, AJ Weinstein, WJ Wisniewski, DH Wright, CC Young, PR Burchat, CH Cheng, D Kirkby, TI Meyer, C Roat, A De Silva, R Henderson, W Bugg, H Cohn, AW Weidemann, JM Izen, I Kitayama, XC Lou, M Turcotte, F Bianchi, M Bona, B Di Girolamo, D Gamba, A Smol, D Zanin, L Bosisio, G Della Ricca, L Lanceri, A Pompili, P Poropat, G Vuagnin, RS Panvini, CM Brown, R Kowalewski, JM Roney, HR Band, E Charles, S Dasu, F Di Lodovico, AM Eichenbaum, H Hu, JR Johnson, R Liu, J Nielsen, Y Pan, R Prepost, IJ Scott, SJ Sekula, JH von Wimmersperg-Toeller, SL Wu, Z Yu, H Zobernig, TM Kordich, H Neal, BABAR Collaboration
Abstract:
We present a limit on the branching fraction for the decay B0-->gammagamma using data collected at the Upsilon(4S) resonance with the BABAR detector at the PEP-II asymmetric energy e+e- collider. Based on the observation of one event in the signal region, out of a sample of 21.3x10(6) e+e--->Upsilon(4S)-->BB decays, we establish an upper limit on the branching fraction of B(B0-->gammagamma)<1.7x10(-6) at the 90% confidence level. This result substantially improves upon existing limits.
