Di-jet production in gamma-gamma collisions at LEP2
The DELPHI Collaboration: J. Abdallah, et al
TL;DR
This study measures the production of di-jet events in gamma-gamma collisions at LEP2, comparing experimental data with perturbative QCD predictions to understand high-energy photon interactions.
Contribution
It provides the first detailed measurement of di-jet cross-sections in gamma-gamma collisions at LEP2 energies, testing perturbative QCD models with high-precision data.
Findings
Measured di-jet cross-sections as a function of jet transverse momentum.
Observed agreement and deviations with perturbative QCD calculations.
Extended understanding of photon-photon interactions at high energies.
Abstract
The production of two high-p_T jets in the interactions of quasi-real photons in e+e- collisions at sqrt{s_ee} from 189 GeV to 209 GeV is studied with data corresponding to an integrated e+e- luminosity of 550 pb^{-1}. The jets reconstructed by the k_T cluster algorithm are defined within the pseudo-rapidity range -1 < eta < 1 and with jet transverse momentum, p_T, above 3 GeV/c. The differential di-jet cross-section is measured as a function of the mean transverse momentum ptmean of the jets and is compared to perturbative QCD calculations.
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