Study of Gluon Versus Quark Fragmentation in upsilon -> g g gamma and e+ e- -> q anti-q gamma Events at s**(1/2) = 10-GeV

Technical Report · Mon May 12 00:00:00 EDT 2003

DOI:https://doi.org/10.2172/813100· OSTI ID:813100

Jessop, Colin P ^[1]

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1. SLAC

Using data collected with the CLEO II detector at the Cornell Electron Storage Ring, they determine the ratio R{sub chrg} for the mean charged multiplicity observed in {Upsilon}(1S) {yields} gg{gamma} events, <n{sub gluon}{sup {+-}}>, to the mean charged multiplicity observed in e{sup +}e{sup -} {yields} q{bar q}{gamma} events, <n{sub quark}{sup {+-}}>. They find R{sub chrg} {triple_bond} <n{sub gluon}{sup {+-}}>/<n{sub quark}{sup {+-}}> = 1.04 {+-} 0.02(stat) {+-} 0.05(syst) for jet-jet masses less than 7 GeV.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 813100
• Report Number(s): SLAC-PUB-9804
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ELECTRONS
FRAGMENTATION
GLUONS
MULTIPLICITY
QUARKS
STORAGE RINGS