Measurement of Exclusive rho^0 rho^0 Production in Mid-Virtuality Two-Photon Interactions at LEP

TL;DR

This study measures the cross section of exclusive rho^0 rho^0 production in two-photon interactions at LEP, analyzing how it varies with photon virtuality and energy, providing insights into photon-photon collision dynamics.

Contribution

It presents the first detailed measurement of rho^0 rho^0 production cross sections as functions of photon virtuality and energy at LEP energies.

Findings

Cross section measured across specified q^2 and Wgg ranges.

Results show dependence of production rate on photon virtuality.

Data contribute to understanding two-photon interaction mechanisms.

Abstract

Exclusive rho^0 rho^0 production in two-photon collisions between a quasi-real and a mid-virtuality photon is studied with data collected at LEP at centre-of-mass energies 183GeV < sqrt{s} < 209GeV with a total integrated luminosity of 684.8/pb. The cross section of the process gamma gamma* -> rho^0 rho^0 is determined as a function of the photon virtuality, q^2, and the two-photon centre-of-mass energy, Wgg, in the kinematic region: 0.2GeV^2 < q^2 < 0.85GeV^2 and 1.1GeV < Wgg < 3GeV.