Measurements of the Mass, Total Width, and Two-Photon Partial Width of theηcMeson

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

doi:10.1103/physrevlett.85.3095

Measurements of the Mass, Total Width, and Two-Photon Partial Width of theηcMeson

G Brandenburg, F Würthwein + Show 192 more

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https://doi.org/10.1103/physrevlett.85.3095

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Journal: Physical Review Letters	Publication Date: Oct 9, 2000
Citations: 22

Affiliation: Harvard University Press, California Institute of Technology, Southern Methodist University, Wayne State University, Cornell University, University of Hawaiʻi at Mānoa, University of Kansas, The Ohio State University, University of Colorado Boulder, Syracuse University, Stanford Synchrotron Radiation Lightsource, Stanford University, SLAC National Accelerator Laboratory, University of Illinois Urbana-Champaign, Purdue University West Lafayette, Carnegie Mellon University, University of Florida, University of California, Santa Barbara, University of California, San Diego, Virginia Tech, University at Albany, State University of New York, University of Minnesota, Vanderbilt University, University of Oklahoma, Institute of Particle Physics, McGill University, University of Rochester, Ithaca College, Carleton University, The University of Texas at Austin

#Cornell Electron Storage Ring #Decay Branching Fraction + Show 8 more

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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.

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