Measurement of Exclusive rho^0 rho^0 Production in Two-Photon Collisions at High Q^2 at LEP

TL;DR

This paper measures the cross section of exclusive rho^0 rho^0 production in two-photon collisions involving a highly virtual photon at LEP, analyzing how it varies with photon virtuality and energy.

Contribution

It provides the first detailed measurement of the gamma gamma^* -> rho rho cross section as a function of Q^2 and Wgg in a specific kinematic range.

Findings

Cross section measured across Q^2 and Wgg ranges.

Data shows dependence of cross section on photon virtuality.

Results contribute to understanding two-photon interactions and meson production.

Abstract

Exclusive rho rho production in two-photon collisions involving a single highly virtual photon is studied with data collected at LEP at centre-of-mass energies 89GeV < \sqrt{s} < 209GeV with a total integrated luminosity of 854.7pb^-1 The cross section of the process gamma gamma^* -> rho rho is determined as a function of the photon virtuality, Q^2 and the two-photon centre-of-mass energy, Wgg, in the kinematic region: 1.2GeV^2 < Q^2 < 30GeV^2 and 1.1GeV < Wgg < 3GeV.