Inclusive jet production in two-photon collisions at LEP

Abstract

Inclusive jet production, e⁺e⁻ → e⁺e⁻ jet X, is studied using 560 pb⁻¹ of data collected at LEP with the L3 detector at centre-of-mass energies between 189 and 209 GeV. The inclusive differential cross section is measured using a <i>k_t</i> jet algorithm as a function of the jet transverse momentum, <i>p_t</i>, in the range 3 < <i>p_t</i> < 50 GeV for a pseudorapidity, η, in the range −1 <η< 1. This cross section is well represented by a power law. For high <i>p_t</i> , the measured cross section is significantly higher than the NLO QCD predictions, as already observed for inclusive π^± and π⁰ production.