Measurements of the mass, total width, and two-photon partial width of the eta(c) meson

G Brandenburg; A Ershov; Y S Gao; D Y Kim; R Wilson; T E Browder; Y Li; J L Rodriguez; H Yamamoto; T Bergfeld; B I Eisenstein; J Ernst; G E Gladding; G D Gollin; R M Hans; E Johnson; I Karliner; M A Marsh; M Palmer; C Plager; C Sedlack; M Selen; J J Thaler; J Williams; K W Edwards; R Janicek; P M Patel; A J Sadoff; R Ammar; A Bean; D Besson; R Davis; N Kwak; X Zhao; S Anderson; V V Frolov; Y Kubota; S J Lee; R Mahapatra; J J O'Neill; R Poling; T Riehle; A Smith; C J Stepaniak; J Urheim; S Ahmed; M S Alam; S B Athar; L Jian; L Ling; M Saleem; S Timm; F Wappler; A Anastassov; J E Duboscq; E Eckhart; K K Gan; C Gwon; T Hart; K Honscheid; D Hufnagel; H Kagan; R Kass; T K Pedlar; H Schwarthoff; J B Thayer; E von Toerne; M M Zoeller; S J Richichi; H Severini; P Skubic; A Undrus; S Chen; J Fast; J W Hinson; J Lee; D H Miller; E I Shibata; I P Shipsey; V Pavlunin; D Cronin-Hennessy; A L Lyon; E H Thorndike; C P Jessop; H Marsiske; M L Perl; V Savinov; D Ugolini; X Zhou; T E Coan; V Fadeyev; Y Maravin; I Narsky; R Stroynowski; J Ye; T Wlodek; M Artuso; R Ayad; C Boulahouache; K Bukin; E Dambasuren; S Karamov; G Majumder; G C Moneti; R Mountain; S Schuh; T Skwarnicki; S Stone; G Viehhauser; J C Wang; A Wolf; J Wu; S Kopp; A H Mahmood; S E Csorna; I Danko; K W McLean; S Márka; Z Xu; R Godang; K Kinoshita; I C Lai; S Schrenk; G Bonvicini; D Cinabro; S McGee; L P Perera; G J Zhou; E Lipeles; S P Pappas; M Schmidtler; A Shapiro; W M Sun; A J Weinstein; F Würthwein; D E Jaffe; G Masek; H P Paar; E M Potter; S Prell; V Sharma; D M Asner; A Eppich; T S Hill; R J Morrison; R A Briere; T Ferguson; H Vogel; B H Behrens; W T Ford; A Gritsan; J Roy; J G Smith; J P Alexander; R Baker; C Bebek; B E Berger; K Berkelman; F Blanc; V Boisvert; D G Cassel; M Dickson; P S Drell; K M Ecklund; R Ehrlich; A D Foland; P Gaidarev; R S Galik; L Gibbons; B Gittelman; S W Gray; D L Hartill; B K Heltsley; P I Hopman; C D Jones; D L Kreinick; M Lohner; A Magerkurth; T O Meyer; N B Mistry; E Nordberg; J R Patterson; D Peterson; D Riley; J G Thayer; P G Thies; D Urner; B Valant-Spaight; A Warburton; P Avery; C Prescott; A I Rubiera; J Yelton; J Zheng; CLEO Collaboration

doi:10.1103/PhysRevLett.85.3095

Measurements of the mass, total width, and two-photon partial width of the eta(c) meson

Phys Rev Lett. 2000 Oct 9;85(15):3095-9. doi: 10.1103/PhysRevLett.85.3095.

Authors

G Brandenburg¹, A Ershov, Y S Gao, D Y Kim, R Wilson, T E Browder, Y Li, J L Rodriguez, H Yamamoto, T Bergfeld, B I Eisenstein, J Ernst, G E Gladding, G D Gollin, R M Hans, E Johnson, I Karliner, M A Marsh, M Palmer, C Plager, C Sedlack, M Selen, J J Thaler, J Williams, K W Edwards, R Janicek, P M Patel, A J Sadoff, R Ammar, A Bean, D Besson, R Davis, N Kwak, X Zhao, S Anderson, V V Frolov, Y Kubota, S J Lee, R Mahapatra, J J O'Neill, R Poling, T Riehle, A Smith, C J Stepaniak, J Urheim, S Ahmed, M S Alam, S B Athar, L Jian, L Ling, M Saleem, S Timm, F Wappler, A Anastassov, J E Duboscq, E Eckhart, K K Gan, C Gwon, T Hart, K Honscheid, D Hufnagel, H Kagan, R Kass, T K Pedlar, H Schwarthoff, J B Thayer, E von Toerne, M M Zoeller, S J Richichi, H Severini, P Skubic, A Undrus, S Chen, J Fast, J W Hinson, J Lee, D H Miller, E I Shibata, I P Shipsey, V Pavlunin, D Cronin-Hennessy, A L Lyon, E H Thorndike, C P Jessop, H Marsiske, M L Perl, V Savinov, D Ugolini, X Zhou, T E Coan, V Fadeyev, Y Maravin, I Narsky, R Stroynowski, J Ye, T Wlodek, M Artuso, R Ayad, C Boulahouache, K Bukin, E Dambasuren, S Karamov, G Majumder, G C Moneti, R Mountain, S Schuh, T Skwarnicki, S Stone, G Viehhauser, J C Wang, A Wolf, J Wu, S Kopp, A H Mahmood, S E Csorna, I Danko, K W McLean, S Márka, Z Xu, R Godang, K Kinoshita, I C Lai, S Schrenk, G Bonvicini, D Cinabro, S McGee, L P Perera, G J Zhou, E Lipeles, S P Pappas, M Schmidtler, A Shapiro, W M Sun, A J Weinstein, F Würthwein, D E Jaffe, G Masek, H P Paar, E M Potter, S Prell, V Sharma, D M Asner, A Eppich, T S Hill, R J Morrison, R A Briere, T Ferguson, H Vogel, B H Behrens, W T Ford, A Gritsan, J Roy, J G Smith, J P Alexander, R Baker, C Bebek, B E Berger, K Berkelman, F Blanc, V Boisvert, D G Cassel, M Dickson, P S Drell, K M Ecklund, R Ehrlich, A D Foland, P Gaidarev, R S Galik, L Gibbons, B Gittelman, S W Gray, D L Hartill, B K Heltsley, P I Hopman, C D Jones, D L Kreinick, M Lohner, A Magerkurth, T O Meyer, N B Mistry, E Nordberg, J R Patterson, D Peterson, D Riley, J G Thayer, P G Thies, D Urner, B Valant-Spaight, A Warburton, P Avery, C Prescott, A I Rubiera, J Yelton, J Zheng; CLEO Collaboration

Affiliation

¹ Harvard University, Cambridge, Massachusetts 02138, USA.

PMID: 11019275
DOI: 10.1103/PhysRevLett.85.3095

Abstract

Using 13.4 fb(-1) of data collected with the CLEO detector at the Cornell Electron Storage Ring, we have observed 300 events for the two-photon production of ground-state pseudoscalar charmonium in the decay eta(c)-->K(0)(S)K-/+pi(+/-). We have measured the eta(c) mass to be [2980.4+/-2.3 (stat)+/-0.6 (syst)] MeV and its full width as [27.0+/-5.8 (stat)+/-1.4 (syst)] MeV. We have determined the two-photon partial width of the eta(c) meson to be [7.6+/-0.8 (stat)+/-0.4 (syst)+/-2.3 (br)] keV, with the last uncertainty associated with the decay branching fraction.