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Observation of an excited charm baryon Omega c* decaying to Omega c0gamma.

  • Author(s): Aubert, B;
  • Bona, M;
  • Boutigny, D;
  • Couderc, F;
  • Karyotakis, Y;
  • Lees, JP;
  • Poireau, V;
  • Tisserand, V;
  • Zghiche, A;
  • Grauges, E;
  • Palano, A;
  • Chen, JC;
  • Qi, ND;
  • Rong, G;
  • Wang, P;
  • Zhu, YS;
  • Eigen, G;
  • Ofte, I;
  • Stugu, B;
  • Abrams, GS;
  • Battaglia, M;
  • Brown, DN;
  • Button-Shafer, J;
  • Cahn, RN;
  • Charles, E;
  • Gill, MS;
  • Groysman, Y;
  • Jacobsen, RG;
  • Kadyk, JA;
  • Kerth, LT;
  • Kolomensky, Yu G;
  • Kukartsev, G;
  • Lynch, G;
  • Mir, LM;
  • Orimoto, TJ;
  • Pripstein, M;
  • Roe, NA;
  • Ronan, MT;
  • Wenzel, WA;
  • del Amo Sanchez, P;
  • Barrett, M;
  • Ford, KE;
  • Hart, AJ;
  • Harrison, TJ;
  • Hawkes, CM;
  • Watson, AT;
  • Held, T;
  • Koch, H;
  • Lewandowski, B;
  • Pelizaeus, M;
  • Peters, K;
  • Schroeder, T;
  • Steinke, M;
  • Boyd, JT;
  • Burke, JP;
  • Cottingham, WN;
  • Walker, D;
  • Asgeirsson, DJ;
  • Cuhadar-Donszelmann, T;
  • Fulsom, BG;
  • Hearty, C;
  • Knecht, NS;
  • Mattison, TS;
  • McKenna, JA;
  • Khan, A;
  • Kyberd, P;
  • Saleem, M;
  • Sherwood, DJ;
  • Teodorescu, L;
  • Blinov, VE;
  • Bukin, AD;
  • Druzhinin, VP;
  • Golubev, VB;
  • Onuchin, AP;
  • Serednyakov, SI;
  • Skovpen, Yu I;
  • Solodov, EP;
  • Todyshev, K Yu;
  • Bondioli, M;
  • Bruinsma, M;
  • Chao, M;
  • Curry, S;
  • Eschrich, I;
  • Kirkby, D;
  • Lankford, AJ;
  • Lund, P;
  • Mandelkern, M;
  • Mommsen, RK;
  • Roethel, W;
  • Stoker, DP;
  • Abachi, S;
  • Buchanan, C;
  • Foulkes, SD;
  • Gary, JW;
  • Long, O;
  • Shen, BC;
  • Wang, K;
  • Zhang, L;
  • Hadavand, HK;
  • Hill, EJ;
  • Paar, HP;
  • Rahatlou, S;
  • Sharma, V;
  • Berryhill, JW;
  • Campagnari, C;
  • Cunha, A;
  • Dahmes, B;
  • Hong, TM;
  • Kovalskyi, D;
  • Richman, JD;
  • Beck, TW;
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  • Heusch, CA;
  • Kroseberg, J;
  • Lockman, WS;
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  • Schalk, T;
  • Schumm, BA;
  • Seiden, A;
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  • Williams, DC;
  • Wilson, MG;
  • Albert, J;
  • Chen, E;
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  • Fang, F;
  • Hitlin, DG;
  • Narsky, I;
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  • Ryd, A;
  • Mancinelli, G;
  • Meadows, BT;
  • Mishra, K;
  • Sokoloff, MD;
  • Blanc, F;
  • Bloom, PC;
  • Chen, S;
  • Ford, WT;
  • Hirschauer, JF;
  • Kreisel, A;
  • Nagel, M;
  • Nauenberg, U;
  • Olivas, A;
  • Ruddick, WO;
  • Smith, JG;
  • Ulmer, KA;
  • Wagner, SR;
  • Zhang, J;
  • Chen, A;
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  • Soffer, A;
  • Toki, WH;
  • Wilson, RJ;
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  • Feltresi, E;
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  • Petzold, A;
  • Spaan, B;
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  • Mader, WF;
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  • Schubert, KR;
  • Schwierz, R;
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  • Bonneaud, GR;
  • Latour, E;
  • Thiebaux, Ch;
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  • Clark, PJ;
  • Gradl, W;
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  • Xie, Y;
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  • Calabrese, R;
  • Cibinetto, G;
  • Luppi, E;
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  • Petrella, A;
  • Piemontese, L;
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  • Baldini-Ferroli, R;
  • Calcaterra, A;
  • de Sangro, R;
  • Finocchiaro, G;
  • Pacetti, S;
  • Patteri, P;
  • Peruzzi, IM;
  • Piccolo, M;
  • Rama, M;
  • Zallo, A;
  • Buzzo, A;
  • Contri, R;
  • Lo Vetere, M;
  • Macri, MM;
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  • Patrignani, C;
  • Robutti, E;
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  • Davier, M;
  • Grosdidier, G;
  • Höcker, A;
  • Le Diberder, F;
  • Lepeltier, V;
  • Lutz, AM;
  • Oyanguren, A;
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  • Rodier, S;
  • Roudeau, P;
  • Schune, MH;
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  • Wang, WF;
  • Wormser, G;
  • Cheng, CH;
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  • Wright, DM;
  • Chavez, CA;
  • Forster, IJ;
  • Fry, JR;
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  • Gamet, R;
  • George, KA;
  • Hutchcroft, DE;
  • Payne, DJ;
  • Schofield, KC;
  • Touramanis, C;
  • Bevan, AJ;
  • Di Lodovico, F;
  • Menges, W;
  • Sacco, R;
  • Cowan, G;
  • Flaecher, HU;
  • Hopkins, DA;
  • Jackson, PS;
  • McMahon, TR;
  • Ricciardi, S;
  • Salvatore, F;
  • Wren, AC;
  • Brown, DN;
  • Davis, CL;
  • Allison, J;
  • Barlow, NR;
  • Barlow, RJ;
  • Chia, YM;
  • Edgar, CL;
  • Lafferty, GD;
  • Naisbit, MT;
  • Williams, JC;
  • Yi, JI;
  • Chen, C;
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  • Jawahery, A;
  • Lae, CK;
  • Roberts, DA;
  • Simi, G;
  • Blaylock, G;
  • Dallapiccola, C;
  • Hertzbach, SS;
  • Li, X;
  • Moore, TB;
  • Saremi, S;
  • Staengle, H;
  • Cowan, R;
  • Sciolla, G;
  • Sekula, SJ;
  • Spitznagel, M;
  • Taylor, F;
  • Yamamoto, RK;
  • Kim, H;
  • Mclachlin, SE;
  • Patel, PM;
  • Robertson, SH;
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  • Lombardo, V;
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  • Kroeger, R;
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  • Summers, DJ;
  • Zhao, HW;
  • Brunet, S;
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  • Wong, QK;
  • Blount, NL;
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  • et al.
Abstract

We report the first observation of an excited singly charmed baryon Omega c* (css) in the radiative decay Omega c0gamma, where the Omega c0 baryon is reconstructed in the decays to the final states Omega(-)pi+, Omega(-)pi+pi0, Omega(-)pi+pi(-)pi+, and Xi(-)K(-)pi+pi+. This analysis is performed using a data set of 230.7 fb(-1) collected by the BABAR detector at the PEP-II asymmetric-energy B factory at the Stanford Linear Accelerator Center. The mass difference between the Omega c* and the Omega c0 baryons is measured to be 70.8+/-1.0(stat)+/-1.1(syst) MeV/c2. We also measure the ratio of inclusive production cross sections of Omega c* and Omega c0 in e+e(-) annihilation.

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