Jet production in two-photon collisions at LEP
Thorsten Wengler
TL;DR
This paper investigates jet and di-jet production in two-photon collisions at LEP, comparing experimental results with QCD predictions, revealing good agreement in di-jet cross sections but significant discrepancies in single jet production at high transverse momenta.
Contribution
The study provides a detailed comparison of experimental measurements with NLO QCD calculations in two-photon collisions at LEP energies, highlighting areas of agreement and discrepancy.
Findings
Good agreement of NLO QCD with di-jet cross sections
Disagreement of NLO QCD with single jet production at high transverse momenta
Experimental data extends up to 25 GeV transverse energy
Abstract
Jet and di-jet production are studied in collisions of quasi-real photons collected during the LEP2 program at e+e- center-of-mass energies from 189 to 209 GeV. OPAL reports good agreement of NLO perturbative QCD with the measured differential di-jet cross sections, which reach a mean transverse energy of the di-jet system of 25 GeV. L3, on the other hand, finds drastic disagreement of the same calculation with single jet production for transverse jet momenta larger than about 25 GeV.
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