We study the processes γγ → ηc → η0KþK−, η0πþπ−, and ηπþπ− using a data sample of 519 fb−1 recorded with the BABAR detector operating at the SLAC PEP-II asymmetric-energy e+e− collider at center-of-mass energies at and near the Υ(nS) (n = 2, 3, 4) resonances. This is the first observation of the decay ηc → η0KþK− and we measure the branching fraction Γðηc → η0KþK−Þ=ðΓðηc → η0πþπ−Þ 1⁄4 0.644 0.039stat 0.032sys. Significant interference is observed between γγ → ηc → ηπþπ− and the nonresonant two-photon process γγ → ηπþπ−. A Dalitz plot analysis is performed of ηc decays to η0KþK−, η0πþπ−, and ηπþπ−. Combined with our previous analysis of ηc → KK ̄ π, we measure the K 0ð1430Þ parameters and the ratio between its η0K and πK couplings. The decay ηc → η0πþπ− is dominated by the f0ð2100Þ resonance, also observed in J=ψ radiative decays. A new a0(1700)→ ηπ resonance is observed in the ηc → ηπþπ− channel. We also compare ηc decays to η and η0 final states in association with scalar mesons as they relate to the identification of the scalar glueball.
Light meson spectroscopy from Dalitz plot analyses ηc decays to η0K + K − , η0π + π − , and ηπ + π − produced in two-photon interactions / Lees, J. ???P.; Poireau, V.; Tisserand, V.; Grauges, E.; Palano, A.; Eigen, G.; Brown, D. ???N.; Kolomensky, Yu. ???G.; Fritsch, M.; Koch, H.; Schroeder, T.; Cheaib, R.; Hearty, C.; Mattison, T. ???S.; Mckenna, J. ???A.; So, R. ???Y.; Blinov, V. ???E.; Buzykaev, A. ???R.; Druzhinin, V. ???P.; Golubev, V. ???B.; Kozyrev, E. ???A.; Kravchenko, E. ???A.; Onuchin, A. ???P.; Serednyakov, S. ???I.; Skovpen, Yu. ???I.; Solodov, E. ???P.; Todyshev, K. ???Yu.; Lankford, A. ???J.; Dey, B.; Gary, J. ???W.; Long, O.; Eisner, A. ???M.; Lockman, W. ???S.; Panduro Vazquez, W.; Chao, D. ???S.; Cheng, C. ???H.; Echenard, B.; Flood, K. ???T.; Hitlin, D. ???G.; Kim, J.; Li, Y.; Lin, D. ???X.; Miyashita, T. ???S.; Ongmongkolkul, P.; Oyang, J.; Porter, F. ???C.; R??hrken, M.; Huard, Z.; Meadows, B. ???T.; Pushpawela, B. ???G.; Sokoloff, M. ???D.; Sun, L.; Smith, J. ???G.; Wagner, S. ???R.; Bernard, D.; Verderi, M.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cibinetto, G.; Fioravanti, E.; Garzia, I.; Luppi, E.; Santoro, V.; Calcaterra, A.; de Sangro, R.; Finocchiaro, G.; Martellotti, S.; Patteri, P.; Peruzzi, I. ???M.; Piccolo, M.; Rotondo, M.; Zallo, A.; Passaggio, S.; Patrignani, C.; Shuve, B. ???J.; Lacker, H. ???M.; Bhuyan, B.; Mallik, U.; Chen, C.; Cochran, J.; Prell, S.; Gritsan, A. ???V.; Arnaud, N.; Davier, M.; Le Diberder, F.; Lutz, A. ???M.; Wormser, G.; Lange, D. ???J.; Wright, D. ???M.; Coleman, J. ???P.; Gabathuler, E.; Hutchcroft, D. ???E.; Payne, D. ???J.; Touramanis, C.; Bevan, A. ???J.; Di Lodovico, F.; Sacco, R.; Cowan, G.; Banerjee, Sw.; Brown, D. ???N.; Davis, C. ???L.; Denig, A. ???G.; Gradl, W.; Griessinger, K.; Hafner, A.; Schubert, K. ???R.; Barlow, R. ???J.; Lafferty, G. ???D.; Cenci, R.; Jawahery, A.; Roberts, D. ???A.; Cowan, R.; Robertson, S. ???H.; Seddon, R. ???M.; Neri, N.; Palombo, F.; Cremaldi, L.; Godang, R.; Summers, D. ???J.; Taras, P.; De Nardo, G.; Sciacca, C.; Raven, G.; Jessop, C. ???P.; Losecco, J. ???M.; Honscheid, K.; Kass, R.; Gaz, A.; Margoni, M.; Posocco, M.; Simi, G.; Simonetto, F.; Stroili, R.; Akar, S.; Ben-Haim, E.; Bomben, M.; Bonneaud, G. ???R.; Calderini, G.; Chauveau, J.; Marchiori, G.; Ocariz, J.; Biasini, M.; Manoni, E.; Rossi, A.; Batignani, G.; Bettarini, S.; Carpinelli, M.; Casarosa, G.; Chrzaszcz, M.; Forti, F.; Giorgi, M. ???A.; Lusiani, A.; Oberhof, B.; Paoloni, E.; Rama, M.; Rizzo, G.; Walsh, J. ???J.; Zani, L.; Smith, A. ???J. ???S.; Anulli, F.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Pilloni, A.; Piredda, G.; B??nger, C.; Dittrich, S.; Gr??nberg, O.; He??, M.; Leddig, T.; Vo??, C.; Waldi, R.; Adye, T.; Wilson, F. ???F.; Emery, S.; Vasseur, G.; Aston, D.; Cartaro, C.; Convery, M. ???R.; Dorfan, J.; Dunwoodie, W.; Ebert, M.; Field, R. ???C.; Fulsom, B. ???G.; Graham, M. ???T.; Hast, C.; Innes, W. ???R.; Kim, P.; Leith, D. ???W. ???G. ???S.; Luitz, S.; Macfarlane, D. ???B.; Muller, D. ???R.; Neal, H.; Ratcliff, B. ???N.; Roodman, A.; Sullivan, M. ???K.; Va???vra, J.; Wisniewski, W. ???J.; Purohit, M. ???V.; Wilson, J. ???R.; Randle-Conde, A.; Sekula, S. ???J.; Ahmed, H.; Bellis, M.; Burchat, P. ???R.; Puccio, E. ???M. ???T.; Alam, M. ???S.; Ernst, J. ???A.; Gorodeisky, R.; Guttman, N.; Peimer, D. ???R.; Soffer, A.; Spanier, S. ???M.; Ritchie, J. ???L.; Schwitters, R. ???F.; Izen, J. ???M.; Lou, X. ???C.; Bianchi, F.; De Mori, F.; Filippi, A.; Gamba, D.; Lanceri, L.; Vitale, L.; Martinez-Vidal, F.; Oyanguren, A.; Albert, J.; Beaulieu, A.; Bernlochner, F. ???U.; King, G. ???J.; Kowalewski, R.; Lueck, T.; Nugent, I. ???M.; Roney, J. ???M.; Sobie, R. ???J.; Tasneem, N.; Gershon, T. ???J.; Harrison, P. ???F.; Latham, T. ???E.; Prepost, R.; Wu, S. ???L.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - ELETTRONICO. - 104:7(2021), pp. 07200201-07200223. [10.1103/physrevd.104.072002]
Light meson spectroscopy from Dalitz plot analyses ηc decays to η0K + K − , η0π + π − , and ηπ + π − produced in two-photon interactions
M. Bomben;C. Cartaro;L. Lanceri;L. Vitale;
2021-01-01
Abstract
We study the processes γγ → ηc → η0KþK−, η0πþπ−, and ηπþπ− using a data sample of 519 fb−1 recorded with the BABAR detector operating at the SLAC PEP-II asymmetric-energy e+e− collider at center-of-mass energies at and near the Υ(nS) (n = 2, 3, 4) resonances. This is the first observation of the decay ηc → η0KþK− and we measure the branching fraction Γðηc → η0KþK−Þ=ðΓðηc → η0πþπ−Þ 1⁄4 0.644 0.039stat 0.032sys. Significant interference is observed between γγ → ηc → ηπþπ− and the nonresonant two-photon process γγ → ηπþπ−. A Dalitz plot analysis is performed of ηc decays to η0KþK−, η0πþπ−, and ηπþπ−. Combined with our previous analysis of ηc → KK ̄ π, we measure the K 0ð1430Þ parameters and the ratio between its η0K and πK couplings. The decay ηc → η0πþπ− is dominated by the f0ð2100Þ resonance, also observed in J=ψ radiative decays. A new a0(1700)→ ηπ resonance is observed in the ηc → ηπþπ− channel. We also compare ηc decays to η and η0 final states in association with scalar mesons as they relate to the identification of the scalar glueball.| File | Dimensione | Formato | |
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