Aubert, B; Bona, M; Karyotakis, Y; Lees, JP; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V; Garra Tico, J; Grauges, E; Lopez, L; Palano, A; Pappagallo, M; Eigen, G; Stugu, B; Sun, L; Battaglia, M; Brown, DN; Kerth, LT; Kolomensky, Yu G; Lynch, G; Osipenkov, IL; Tackmann, K; Tanabe, T; Hawkes, CM; Soni, N; Watson, AT; Koch, H; Schroeder, T; Asgeirsson, DJ; Fulsom, BG; Hearty, C; Mattison, TS; McKenna, JA; Barrett, M; Khan, A; Randle-Conde, A; Blinov, VE; Bukin, AD; Buzykaev, AR; Druzhinin, VP; Golubev, VB; Onuchin, AP; Serednyakov, SI; Skovpen, Yu I; Solodov, EP; Todyshev, K Yu; Bondioli, M; Curry, S; Eschrich, I; Kirkby, D; Lankford, AJ; Lund, P; Mandelkern, M; Martin, EC; Stoker, DP; Abachi, S; Buchanan, C; Atmacan, H; Gary, JW; Liu, F; Long, O; Vitug, GM; Yasin, Z; Zhang, L; Sharma, V; Campagnari, C; Hong, TM; Kovalskyi, D; Mazur, MA; Richman, JD; Beck, TW; Eisner, AM; Heusch, CA; Kroseberg, J; Lockman, WS; Martinez, AJ; Schalk, T; Schumm, BA; Seiden, A; Winstrom, LO; Cheng, CH; Doll, DA; Echenard, B; Fang, F

doi:10.1103/physrevlett.103.161801

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Evidence for the eta(b)(1S) meson in radiative Upsilon(2S) decay.

2009

Author(s): Aubert, B;
Bona, M;
Karyotakis, Y;
Lees, JP;
Poireau, V;
Prencipe, E;
Prudent, X;
Tisserand, V;
Garra Tico, J;
Grauges, E;
Lopez, L;
Palano, A;
Pappagallo, M;
Eigen, G;
Stugu, B;
Sun, L;
Battaglia, M;
Brown, DN;
Kerth, LT;
Kolomensky, Yu G;
Lynch, G;
Osipenkov, IL;
Tackmann, K;
Tanabe, T;
Hawkes, CM;
Soni, N;
Watson, AT;
Koch, H;
Schroeder, T;
Asgeirsson, DJ;
Fulsom, BG;
Hearty, C;
Mattison, TS;
McKenna, JA;
Barrett, M;
Khan, A;
Randle-Conde, A;
Blinov, VE;
Bukin, AD;
Buzykaev, AR;
Druzhinin, VP;
Golubev, VB;
Onuchin, AP;
Serednyakov, SI;
Skovpen, Yu I;
Solodov, EP;
Todyshev, K Yu;
Bondioli, M;
Curry, S;
Eschrich, I;
Kirkby, D;
Lankford, AJ;
Lund, P;
Mandelkern, M;
Martin, EC;
Stoker, DP;
Abachi, S;
Buchanan, C;
Atmacan, H;
Gary, JW;
Liu, F;
Long, O;
Vitug, GM;
Yasin, Z;
Zhang, L;
Sharma, V;
Campagnari, C;
Hong, TM;
Kovalskyi, D;
Mazur, MA;
Richman, JD;
Beck, TW;
Eisner, AM;
Heusch, CA;
Kroseberg, J;
Lockman, WS;
Martinez, AJ;
Schalk, T;
Schumm, BA;
Seiden, A;
Winstrom, LO;
Cheng, CH;
Doll, DA;
Echenard, B;
Fang, F;
Hitlin, DG;
Narsky, I;
Piatenko, T;
Porter, FC;
Andreassen, R;
Mancinelli, G;
Meadows, BT;
Mishra, K;
Sokoloff, MD;
Bloom, PC;
Ford, WT;
Gaz, A;
Hirschauer, JF;
Nagel, M;
Nauenberg, U;
Smith, JG;
Wagner, SR;
Ayad, R;
Soffer, A;
Toki, WH;
Wilson, RJ;
Feltresi, E;
Hauke, A;
Jasper, H;
Karbach, M;
Merkel, J;
Petzold, A;
Spaan, B;
Wacker, K;
Kobel, MJ;
Nogowski, R;
Schubert, KR;
Schwierz, R;
Volk, A;
Bernard, D;
Bonneaud, GR;
Latour, E;
Verderi, M;
Clark, PJ;
Playfer, S;
Watson, JE;
Andreotti, M;
Bettoni, D;
Bozzi, C;
Calabrese, R;
Cecchi, A;
Cibinetto, G;
Franchini, P;
Luppi, E;
Negrini, M;
Petrella, A;
Piemontese, L;
Santoro, V;
Baldini-Ferroli, R;
Calcaterra, A;
de Sangro, R;
Finocchiaro, G;
Pacetti, S;
Patteri, P;
Peruzzi, IM;
Piccolo, M;
Rama, M;
Zallo, A;
Contri, R;
Lo Vetere, M;
Monge, MR;
Passaggio, S;
Patrignani, C;
Robutti, E;
Tosi, S;
Chaisanguanthum, KS;
Morii, M;
Adametz, A;
Marks, J;
Schenk, S;
Uwer, U;
Bernlochner, FU;
Klose, V;
Lacker, HM;
Bard, DJ;
Dauncey, PD;
Tibbetts, M;
Behera, PK;
Chai, X;
Charles, MJ;
Mallik, U;
Cochran, J;
Crawley, HB;
Dong, L;
Meyer, WT;
Prell, S;
Rosenberg, EI;
Rubin, AE;
Gao, YY;
Gritsan, AV;
Guo, ZJ;
Arnaud, N;
Béquilleux, J;
D'Orazio, A;
Davier, M;
Firmino da Costa, J;
Grosdidier, G;
Le Diberder, F;
Lepeltier, V;
Lutz, AM;
Pruvot, S;
Roudeau, P;
Schune, MH;
Serrano, J;
Sordini, V;
Stocchi, A;
Wormser, G;
Lange, DJ;
Wright, DM;
Bingham, I;
Burke, JP;
Chavez, CA;
Fry, JR;
Gabathuler, E;
Gamet, R;
Hutchcroft, DE;
Payne, DJ;
Touramanis, C;
Bevan, AJ;
Clarke, CK;
Di Lodovico, F;
Sacco, R;
Sigamani, M;
Cowan, G;
Paramesvaran, S;
Wren, AC;
Brown, DN;
Davis, CL;
Denig, AG;
Fritsch, M;
Gradl, W;
Alwyn, KE;
Bailey, D;
Barlow, RJ;
Jackson, G;
Lafferty, GD;
West, TJ;
Yi, JI;
Anderson, J;
Chen, C;
Jawahery, A;
Roberts, DA;
Simi, G;
Tuggle, JM;
Dallapiccola, C;
Salvati, E;
Saremi, S;
Cowan, R;
Dujmic, D;
Fisher, PH;
Henderson, SW;
Sciolla, G;
Spitznagel, M;
Taylor, F;
Yamamoto, RK;
Zhao, M;
Patel, PM;
Robertson, SH;
Lazzaro, A;
Lombardo, V;
Palombo, F;
Bauer, JM;
Cremaldi, L;
Godang, R;
Kroeger, R;
Summers, DJ;
Zhao, HW;
Simard, M;
Taras, P;
Nicholson, H;
De Nardo, G;
Lista, L;
Monorchio, D;
Onorato, G;
Sciacca, C;
Raven, G;
Snoek, HL;
Jessop, CP;
Knoepfel, KJ;
Losecco, JM;
Wang, WF;
Corwin, LA;
Honscheid, K;
Kagan, H;
Kass, R;
Morris, JP;
Rahimi, AM;
Regensburger, JJ;
Sekula, SJ;
Wong, QK;
Blount, NL;
Brau, J;
Frey, R;
Igonkina, O;
Kolb, JA;
Lu, M;
Rahmat, R;
Sinev, NB;
Strom, D;
Strube, J;
Torrence, E;
Castelli, G;
Gagliardi, N;
Margoni, M;
Morandin, M;
Posocco, M;
Rotondo, M;
Simonetto, F;
Stroili, R;
Voci, C;
Del Amo Sanchez, P;
Ben-Haim, E;
Briand, H;
Chauveau, J;
Hamon, O;
Leruste, Ph;
Ocariz, J;
Perez, A;
Prendki, J;
Sitt, S;
Gladney, L;
Biasini, M;
Manoni, E;
Angelini, C;
Batignani, G;
Bettarini, S;
Calderini, G;
Carpinelli, M;
Cervelli, A;
Forti, F;
Giorgi, MA;
Lusiani, A;
Marchiori, G;
Morganti, M;
Neri, N;
Paoloni, E;
Rizzo, G;
Walsh, JJ;
Lopes Pegna, D;
Lu, C;
Olsen, J;
Smith, AJS;
Telnov, AV;
Anulli, F;
Baracchini, E;
Cavoto, G;
Faccini, R;
Ferrarotto, F;
Ferroni, F;
Gaspero, M;
Jackson, PD;
Li Gioi, L;
Mazzoni, MA;
Morganti, S;
Piredda, G;
Renga, F;
Voena, C;
Ebert, M;
Hartmann, T;
Schröder, H;
Waldi, R;
Adye, T;
Franek, B;
Olaiya, EO;
Wilson, FF;
Emery, S;
Esteve, L;
Hamel de Monchenault, G;
Kozanecki, W;
Vasseur, G;
Yèche, Ch;
Zito, M;
Chen, XR;
Liu, H;
Park, W;
Purohit, MV;
White, RM;
Wilson, JR;
Allen, MT;
Aston, D;
Bartoldus, R;
Benitez, JF;
Cenci, R;
Coleman, JP;
Convery, MR;
Dingfelder, JC;
Dorfan, J;
Dubois-Felsmann, GP;
Dunwoodie, W;
Field, RC;
Gabareen, AM;
Graham, MT;
Grenier, P;
Hast, C;
Innes, WR;
Kaminski, J;
Kelsey, MH;
Kim, H;
Kim, P;
Kocian, ML;
Leith, DWGS;
Li, S;
Lindquist, B;
Luitz, S;
Luth, V;
Lynch, HL;
Macfarlane, DB;
Marsiske, H;
Messner, R;
Muller, DR;
Neal, H;
Nelson, S;
O'Grady, CP;
Ofte, I;
Perl, M;
Ratcliff, BN;
Roodman, A;
Salnikov, AA;
Schindler, RH;
Schwiening, J;
Snyder, A;
Su, D;
Sullivan, MK;
Suzuki, K;
Swain, SK;
Thompson, JM;
Va'vra, J;
Wagner, AP;
Weaver, M;
West, CA;
Wisniewski, WJ;
Wittgen, M;
Wright, DH;
Wulsin, HW;
Yarritu, AK;
Yi, K;
Young, CC;
Ziegler, V;
Burchat, PR;
Edwards, AJ;
Miyashita, TS;
Ahmed, S;
Alam, MS;
Ernst, JA;
Pan, B;
Saeed, MA;
Zain, SB;
Spanier, SM;
Wogsland, BJ;
Eckmann, R;
Ritchie, JL;
Ruland, AM;
Schilling, CJ;
Schwitters, RF;
Drummond, BW;
Izen, JM;
Lou, XC;
Bianchi, F;
Gamba, D;
Pelliccioni, M;
Bomben, M;
Bosisio, L;
Cartaro, C;
Della Ricca, G;
Lanceri, L;
Vitale, L;
Azzolini, V;
Lopez-March, N;
Martinez-Vidal, F;
Milanes, DA;
Oyanguren, A;
Albert, J;
Banerjee, Sw;
Bhuyan, B;
Choi, HHF;
Hamano, K;
King, GJ;
Kowalewski, R;
Lewczuk, MJ;
Nugent, IM;
Roney, JM;
Sobie, RJ;
Gershon, TJ;
Harrison, PF;
Ilic, J;
Latham, TE;
Mohanty, GB;
Puccio, EMT;
Band, HR;
Chen, X;
Dasu, S;
Flood, KT;
Pan, Y;
Prepost, R;
Vuosalo, CO;
Wu, SL;
BABAR Collaboration
et al.

Published Web Location

https://doi.org/10.1103/physrevlett.103.161801

Creative Commons 'BY' version 4.0 license

Abstract

We have performed a search for the eta_{b}(1S) meson in the radiative decay of the Upsilon(2S) resonance using a sample of 91.6x10(6) Upsilon(2S) events recorded with the BABAR detector at the PEP-II B factory at the SLAC National Accelerator Laboratory. We observe a peak in the photon energy spectrum at Egamma=609.3(-4.5)(+4.6)(stat)+/-1.9(syst) MeV, corresponding to an eta(b)(1S) mass of 9394.2(-4.9)(+4.8)(stat)+/-2.0(syst) MeV/c2. The branching fraction for the decay Upsilon(2S)-->gamma(eta)b(1S) is determined to be [3.9+/-1.1(stat)-0.9+1.1(syst)]x10(-4). We find the ratio of branching fractions B[Upsilon(2S)-->gamma(eta)b(1S)]/B[Upsilon(3S)-->gamma(eta)b(1S)]=0.82+/-0.24(stat)(-0.19)(+0.20)(syst).

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Evidence for the eta(b)(1S) meson in radiative Upsilon(2S) decay.

Published Web Location