Study of gluon versus quark fragmentation in {Upsilon}{r_arrow}gg{gamma} and e{sup +}e{sup {minus}}{r_arrow}q{bar q}{gamma} events at {radical}(s)=10 GeV

Journal Article · Tue Jul 01 00:00:00 EDT 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.56.17· OSTI ID:628691

Alam, M S; Athar, S B; Ling, Z; Mahmood, A H; Severini, H; Timm, S; Wappler, F ^[1]; Anastassov, A; Blinov, S; Duboscq, J E; Fujino, D; Fulton, R; Gan, K K; Hart, T; Honscheid, K; Kagan, H; Kass, R; Lee, J; Spencer, M B; Sung, M ; Undrus, A; Wanke, R; Wolf, A; Zoeller, M M ^[2]; Nemati, B; Richichi, S J; Ross, W R; Skubic, P; Wood, M ^[3]; Bishai, M; Fast, J; Gerndt, E; Hinson, J W; Menon, N; Miller, D H; Shibata, E I; Shipsey, I P; Yurko, M ^[4]; Gibbons, L; Johnson, S D; Kwon, Y; Roberts, S; Thorndike, E H ^[5]; Jessop, C P; Lingel, K; Marsiske, H; Perl, M L; Schaffner, S F; Ugolini, D; Wang, R; Zhou, X ^[6]; Coan, T E; Fadeyev, V; Korolkov, I; Maravin, Y; Narsky, I; Shelkov, V; Staeck, J; Stroynowski, R; Volobouev, I; Ye, J ^[7]; Artuso, M; Efimov, A; Frasconi, F; Gao, M; Goldberg, M; He, D; Kopp, S; Moneti, G C; Mountain, R; Mukhin, Y; Schuh, S; Skwarnicki, T; Stone, S; Viehhauser, G; Xing, X ^[8]; Bartelt, J; Csorna, S E; Jain, V; Marka, S ^[9]; Freyberger, A; Gibaut, D; Godang, R; Kinoshita, K; Lai, I C; Pomianowski, P; Schrenk, S ^[10]; Bonvicini, G; Cinabro, D; Greene, R; Perera, L P ^[11]; Barish, B; Chadha, M; others, and

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1. State University of New York at Albany, Albany, New York 12222 (United States)
2. Ohio State University, Columbus, Ohio 43210 (United States)
3. University of Oklahoma, Norman, Oklahoma 73019 (United States)
4. Purdue University, West Lafayette, Indiana 47907 (United States)
5. University of Rochester, Rochester, New York 14627 (United States)
6. Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309 (United States)
7. Southern Methodist University, Dallas, Texas 75275 (United States)
8. Syracuse University, Syracuse, New York 13244 (United States)
9. Vanderbilt University, Nashville, Tennessee 37235 (United States)
10. Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061 (United States)
11. Wayne State University, Detroit, Michigan 48202 (United States)

Using data collected with the CLEO II detector at the Cornell Electron Storage Ring, we determine the ratio R{sub chrg} for the mean charged multiplicity observed in {Upsilon}(1S){r_arrow}gg{gamma} events, {l_angle}n{sub gluon}{sup {plus_minus}}{r_angle}, to the mean charged multiplicity observed in e{sup +}e{sup {minus}}{r_arrow}q{bar q}{gamma} events, {l_angle}n{sub quark}{sup {plus_minus}}{r_angle}. We find R{sub chrg}{equivalent_to}{l_angle}n{sub gluon}{sup {plus_minus}}{r_angle}/{l_angle}n{sub quark}{sup {plus_minus}}{r_angle}=1.04 {plus_minus}0.02(stat){plus_minus}0.05(syst) for jet-jet masses less than 7 GeV. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 628691
• Journal Information: Physical Review, D, Vol. 56, Issue 1; Other Information: PBD: Jul 1997
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
UPSILON-9460 MESONS
GAMMA DECAY
GLUONS
QUARKS
ELECTRON-POSITRON INTERACTIONS
PHOTONS
FRAGMENTATION
STORAGE RINGS
MULTIPLICITY
MASS
JETS