Study Of Gluon Versus Quark Fragmentation In Y->Gg Gamma And E(+)E(-)->Q(Q)Over-Bar Gamma Events At Root S=10 Gev

M. S. Alam,S. B. Athar,Z. Ling, A. H. Mahmood, H. Severini,S. Timm,F. Wappler, A. Anastassov,S. Blinov,J. E. Duboscq,D. Fujino,R. Fulton,K. K. Gan, T. Hart,K. Honscheid,H. Kagan, R. Kass,J. Lee,M. B. Spencer,M. Sung, A. Undrus,R. Wanke, A. Wolf, M. M. Zoeller,B. Nemati,S. J. Richichi,W. R. Ross, P. Skubic,M. Wood,M. Bishai,J. Fast,E. Gerndt, J. W. Hinson,N. Menon,D. H. Miller,E. I. Shibata,I. P. J. Shipsey, M. Yurko, L. Gibbons,S. D. Johnson,Y. Kwon,S. Roberts,E. H. Thorndike,C. P. Jessop,K. Lingel,H. Marsiske, M. L. Perl,S. F. Schaffner, D. Ugolini,R. Wang,X. Zhou,T. E. Coan,V. Fadeyev, I. Korolkov, Y. Maravin,I. Narsky,V. Shelkov,J. Staeck, R. Stroynowski, I. Volobouev,J. Ye,M. Artuso,A. Efimov,F. Frasconi,M. Gao,M. Goldberg, D. He,S. Kopp,G. C. Moneti,R. Mountain, Y. Mukhin,S. Schuh,T. Skwarnicki,S. Stone,G. Viehhauser,X. Xing, J. Bartelt,S. E. Csorna,V. Jain,S. Marka,A. Freyberger, D. Gibaut, R. Godang,K. Kinoshita,I. C. Lai,P. Pomianowski,S. Schrenk,G. Bonvicini,D. Cinabro,R. Greene,L. P. Perera,B. Barish,M. Chadha,S. Chan,G. Eigen,J. S. Miller, C. O’ Grady,M. Schmidtler,J. Urheim, A. J. Weinstein, F. Würthwein,D. M. Asner,D. W. Bliss,W. S. Brower,G. Masek,H. P. Paar,M. Sivertz, J. Gronberg,R. Kutschke, D. J. Lange,S. Menary,R. J. Morrison,S. Nakanishi,H. N. Nelson,T. K. Nelson,C. Qiao, J. D. Richman,D. Roberts, A. Ryd,H. Tajima,M. S. Witherell,R. Balest,B. H. Behrens,K. Cho, W. T. Ford,H. Park,P. Rankin,J. Roy,J. G. Smith, J. P. Alexander,C. Bebek,B. E. Berger,K. Berkelman,K. Bloom, D. G. Cassel,H. A. Cho,D. M. Coffman,D. S. Crowcroft,M. Dickson, P. S. Drell,K. M. Ecklund,R. Ehrlich,R. Elia,A. D. Foland,P. Gaidarev, R. S. Galik,B. Gittelman,S. W. Gray,D. L. Hartill, B. K. Heltsley,P. I. Hopman,S. L. Jones,J. Kandaswamy,N. Katayama,P. C. Kim,D. L. Kreinick,T. Lee, Y. Liu,G. S. Ludwig,J. Masui,J. Mevissen,N. B. Mistry,C. R. Ng,E. Nordberg,M. Ogg, J. R. Patterson,D. Peterson,D. Riley, A. Soffer,C. Ward,M. Athanas,P. Avery,C. D. Jones,M. Lohner, C. Prescott, S. Yang, J. Yelton, J. Zheng,G. Brandenburg,R. A. Briere, Y. S. Gao,D. Y.-J. Kim,R. Wilson,H. Yamamoto,T. E. Browder,F. Li, Y. Li,J. L. Rodriguez,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,M. Selen,J. J. Thaler, K. W. Edwards,A. Bellerive,R. Janicek,D. B. MacFarlane,K. W. McLean,P. M. Patel,A. J. Sadoff,R. Ammar, P. Baringer,A. Bean,D. Besson,D. Coppage,C. Darling,R. Davis,N. Hancock,S. Kotov,I. Kravchenko,N. Kwak,S. Anderson,Y. Kubota, M. Lattery,J. J. O’Neill,S. Patton,R. Poling,T. Riehle, V. Savinov,A. Smith

PHYSICAL REVIEW D（1997）

引用 39|浏览110

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摘要

Using data collected with the CLEO II detector at the Cornell Electron Storage Ring, we determine the ratio R-chrg for the mean charged multiplicity observed in Y(1S)-->gg gamma events, [n(gluon)(+/1)], to the mean charged multiplicity observed in e(+)e(-)-->q (q) over bar gamma events, [n(quark)(+/-)]. We find R-charg = [n(gluon)(+/-)]/[n(quark)(+/-)] = 1.04 +/- 0.02(stat) +/- 0.05(syst) for jet-jet masses less than 7 GeV.

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