Exclusive Rho Rho Production in Tagged Gamma-Gamma Interactions at LEP

TL;DR

This paper investigates exclusive rho rho production in two-photon collisions at LEP, measuring cross sections across various photon virtualities and energies to enhance understanding of photon-induced meson production.

Contribution

It provides the first detailed measurement of gamma gamma* -> rho rho cross sections as functions of Q^2 and Wgg at LEP energies.

Findings

Cross sections measured across Q^2 and Wgg ranges.

Data supports models of meson production in photon interactions.

Results contribute to understanding of two-photon processes.

Abstract

Exclusive rho rho production in two-photon collisions between a quasi-real, gamma, and a virtual, gamma*, photons is studied at LEP at centre-of-mass energies 89 GeV < sqrt{s} < 209 GeV with a total integrated luminosity of 854.7 pb-1. The cross sections of the gamma gamma* -> rho rho processes are determined as a function of the photon virtuality, Q^2, and the two-photon centre-of-mass energy, Wgg, in the kinematic region: 0.2 GeV^2 < Q^2 < 30 GeV^2 and 1.1 GeV < Wgg < 3 GeV.