Charged Particle Momentum Spectra in e+e- annihilation at sqrt(s) = 192-209 GeV

Abstract

Charged particle momentum distributions are studied in the reaction e+e- -> hadrons, using data collected with the OPAL detector at centre-of-mass energies from 192 GeV to 209 GeV. The data correspond to an average centre-of- mass energy of 201.7 GeV and a total integrated luminosity of 433 pb-1. The measured distributions and derived quantities, in combination with corresponding results obtained at lower centre-of-mass energies, are compared to QCD predictions in various theoretical approaches to study the energy dependence of the strong interaction and to test QCD as the theory describing it. In general, a good agreement is found between the measurements and the corresponding QCD predictions.

31 pages, 10 figures

Cited by in corpus (22)

• 50 Years of Quantum Chromodynamics
• Charged-Particle Multiplicity in Proton-Proton Collisions
• Tests of Quantum Chromo Dynamics at e^+e^- Colliders
• Generalised Tsallis Statistics in Electron-Positron Collisions
• The hadronization of partons
• Evolution of minimum-bias parton fragmentation in nuclear collisions
• Global analysis of fragmentation functions to charged hadrons with high-precision data from the LHC
• Resummation of Soft Gluon Logarithms in the DGLAP Evolution of Fragmentation Functions
• Simultaneous Determination of Fragmentation Functions and Test on Momentum Sum Rule
• Interference between initial and final state radiation in a QCD medium
• Generalizing the DGLAP Evolution of Fragmentation Functions to the Smallest x Values
• The Evolution of Hadron Spectra in the Modified Leading Logarithm Approximation
• Fragmentation Functions of Charged Hadrons at Next-to-Next-to-Leading Order and Constraints on the Proton Parton Distribution Functions
• Low x particle spectra in the Modified Leading Logarithm Approximation
• Multiplicity distributions for jet parton showers in a medium
• Studies of event shape observables with the OPAL detector at LEP
• Jet Mass Dependence of Fragmentation in Positron-Proton Collisions
• Multiplicity distributions inside parton cascades developing in a medium
• Determination of alpha_s at NLO*+NNLL from a global fit of the low-z parton-to-hadron fragmentation functions in e+e- and DIS collisions
• Fragmentation in the phi^3 Theory and the LPHD Hypothesis
• Coherence effects between the initial and final state radiation in a dense QCD medium
• In-medium parton branching beyond eikonal approximation