Inclusive Lambda Production in Two-Photon Collisions at LEP

TL;DR

This paper measures inclusive Lambda production in two-photon collisions at LEP, analyzing differential cross sections as functions of transverse momentum and pseudo-rapidity, and compares results with Monte Carlo predictions.

Contribution

It provides the first detailed measurement of Lambda production in two-photon collisions at LEP energies, including differential cross sections and comparison with theoretical models.

Findings

Differential cross section as a function of p_t fits an exponential form.

Data agree well with Monte Carlo predictions.

Provides new insights into Lambda production mechanisms in two-photon processes.

Abstract

The reactions e^+e^- -> e^+e^- Lambda X and e^+e^- -> e^+e^- Lambda X are studied using data collected at LEP with the L3 detector at centre-of-mass energies between 189 and 209 GeV. Inclusive differential cross sections are measured as a function of the lambda transverse momentum, p_t, and pseudo-rapidity, eta, in the ranges 0.4 GeV < p_t < 2.5 GeV and |\eta| < 1.2. The data are compared to Monte Carlo predictions. The differential cross section as a function of p_t is well described by an exponential of the form A exp (- p_t / <p_t>)$.