Comparison of Inclusive Fractional Momentum Distributions of Quark and Gluon Jets Produced in $e^+ e^-$ Annihilation

Inclusive charged particle production ine+e− annihilation into hadrons is studied in terms of the particle fractional momentumxp. Thexp distribution for gluon jets is extracted by comparing two data samples measured in the TASSO detector: nearly symmetric three jet events at centre-of-mass energyW∼35 GeV and two jet events atW∼22 GeV, yielding quark and gluon jets of similar energies (∼11.5 GeV). No significant difference is observed between quark and gluon jets. Monte Carlo models based on parton showers describe the trend and energy variation of the data better than a model with second order matrix element in αs.

electron positron: colliding beams
electron positron: annihilation
electron positron: inclusive reaction
jet: electroproduction
hadron: multiple production
quark: jet
gluon: jet
final state: (3jet)
final state: (2jet)
momentum spectrum

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Comparison of Inclusive Fractional Momentum Distributions of Quark and Gluon Jets Produced in e+e−e^+ e^-e+e− Annihilation

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Comparison of Inclusive Fractional Momentum Distributions of Quark and Gluon Jets Produced in $e^+ e^-$ Annihilation