Measurement of the I=1 /2 Kπ S -wave amplitude from Dalitz plot analyses of ηc →k K ¯ π in two-photon interactions

J. P. Lees, V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, D. N. Brown, Yu G. Kolomensky, H. Koch, T. Schroeder, C. Hearty, T. S. Mattison, J. A. McKenna, R. Y. So, V. E. Blinov, A. R. Buzykaev, V. P. Druzhinin, V. B. Golubev, E. A. Kravchenko, A. P. OnuchinS. I. Serednyakov, Yu I. Skovpen, E. P. Solodov, K. Yu Todyshev, A. J. Lankford, J. W. Gary, O. Long, A. M. Eisner, W. S. Lockman, W. Panduro Vazquez, D. S. Chao, C. H. Cheng, B. Echenard, K. T. Flood, D. G. Hitlin, J. Kim, T. S. Miyashita, P. Ongmongkolkul, F. C. Porter, M. Röhrken, Z. Huard, B. T. Meadows, B. G. Pushpawela, M. D. Sokoloff, L. Sun, J. G. Smith, S. R. Wagner, D. Bernard, M. Verderi, D. Bettoni, C. Bozzi, R. Calabrese, G. Cibinetto, E. Fioravanti, I. Garzia, E. Luppi, V. Santoro, A. Calcaterra, R. De Sangro, G. Finocchiaro, S. Martellotti, P. Patteri, I. M. Peruzzi, M. Piccolo, A. Zallo, S. Passaggio, C. Patrignani, B. Bhuyan, U. Mallik, C. Chen, J. Cochran, S. Prell, H. Ahmed, M. R. Pennington, A. V. Gritsan, N. Arnaud, M. Davier, F. Le Diberder, A. M. Lutz, G. Wormser, D. J. Lange, D. M. Wright, J. P. Coleman, E. Gabathuler, D. E. Hutchcroft, D. J. Payne, C. Touramanis, A. J. Bevan, F. Di Lodovico, R. Sacco, G. Cowan, Sw Banerjee, D. N. Brown, C. L. Davis, A. G. Denig, M. Fritsch, W. Gradl, K. Griessinger, A. Hafner, K. R. Schubert, R. J. Barlow, G. D. Lafferty, R. Cenci, A. Jawahery, D. A. Roberts, R. Cowan, R. Cheaib, S. H. Robertson, B. Dey, N. Neri, F. Palombo, L. Cremaldi, R. Godang, D. J. Summers, P. Taras, G. De Nardo, C. Sciacca, G. Raven, C. P. Jessop, J. M. Losecco, K. Honscheid, R. Kass, A. Gaz, M. Margoni, M. Posocco, M. Rotondo, G. Simi, F. Simonetto, R. Stroili, S. Akar, E. Ben-Haim, M. Bomben, G. R. Bonneaud, G. Calderini, J. Chauveau, G. Marchiori, J. Ocariz, M. Biasini, E. Manoni, A. Rossi, G. Batignani, S. Bettarini, M. Carpinelli, G. Casarosa, M. Chrzaszcz, F. Forti, M. A. Giorgi, A. Lusiani, B. Oberhof, E. Paoloni, M. Rama, G. Rizzo, J. J. Walsh, A. J.S. Smith, F. Anulli, R. Faccini, F. Ferrarotto, F. Ferroni, A. Pilloni, G. Piredda, C. Bünger, S. Dittrich, O. Grünberg, M. Heß, T. Leddig, C. Voß, R. Waldi, T. Adye, F. F. Wilson, S. Emery, G. Hamel De Monchenault, G. Vasseur, D. Aston, C. Cartaro, M. R. Convery, J. Dorfan, W. Dunwoodie, M. Ebert, R. C. Field, B. G. Fulsom, M. T. Graham, C. Hast, W. R. Innes, P. Kim, D. W.G.S. Leith, S. Luitz, V. Luth, D. B. Macfarlane, D. R. Muller, H. Neal, B. N. Ratcliff, A. Roodman, M. K. Sullivan, J. Va'Vra, W. J. Wisniewski, M. V. Purohit, J. R. Wilson, A. Randle-Conde, S. J. Sekula, M. Bellis, P. R. Burchat, E. M.T. Puccio, M. S. Alam, J. A. Ernst, R. Gorodeisky, N. Guttman, D. R. Peimer, A. Soffer, S. M. Spanier, J. L. Ritchie, R. F. Schwitters, J. M. Izen, X. C. Lou, F. Bianchi, F. De Mori, A. Filippi, D. Gamba, L. Lanceri, L. Vitale, F. Martinez-Vidal, A. Oyanguren, J. Albert, A. Beaulieu, F. U. Bernlochner, G. J. King, R. Kowalewski, T. Lueck, I. M. Nugent, J. M. Roney, N. Tasneem, T. J. Gershon, P. F. Harrison, T. E. Latham, R. Prepost, S. L. Wu

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

We study the processes γγ→KS0K±πℓ and γγ→K+K-π0 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. We observe ηc decays to both final states and perform Dalitz plot analyses using a model-independent partial wave analysis technique. This allows a model-independent measurement of the mass-dependence of the I=1/2 Kπ S-wave amplitude and phase. A comparison between the present measurement and those from previous experiments indicates similar behavior for the phase up to a mass of 1.5 GeV/c2. In contrast, the amplitudes show very marked differences. The data require the presence of a new a0(1950) resonance with parameters m=1931±14±22 MeV/c2 and Γ=271±22±29 MeV.

Original languageEnglish
Article number012005
JournalPhysical Review D
Volume93
Issue number1
DOIs
StatePublished - 20 Jan 2016

Funding

FundersFunder number
Stichting voor Fundamenteel Onderzoek der Materie
USA-Israel
Institut National de Physique Nucléaire et de Physique des Particules
Energie Atomique Institut National de Physique Nucléaire et de Physique des Particules Bundesministerium fu¨r Bildung und Forschung http://dx.doi.org/10.13039/501100002347 Federal Ministry of Education and Research BMBF Deutsche Forschungsgemeinschaft
Instituto Nazionale di Fisica Nucleare
Norges Forskningsråd
Ministerio de Economía y Competitividad
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
Deutsche Forschungsgemeinschaft
United States-Israel Binational Science Foundation
European Commission
SLAC National Accelerator Laboratory
U.S. Department of Energy
Marie Curie
Research Council of Norway Forskningsrådet Norwegian Research Council
Ministry of Education and Science of the Russian Federation
Natural Sciences and Engineering Research Council of Canada
Bundesministerium fu¨r Bildung und Forschung and Deutsche Forschungsgemeinschaft
Alfred P. Sloan Foundation
Office of Science
Nuclear Physics
Not addedPP/E003095/1, ST/M000761/1, ST/M004791/1, ST/K00140X/1, ST/J005495/1, ST/I003576/1, ST/M000729/1, ST/L00352X/1, ST/I000097/1, ST/J004855/1, ST/L006146/1, ST/K003534/1, ST/L003163/1, ST/N000420/1
UK Research and Innovation53706
National Science Foundation1404070

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