Exclusive two $ρ^0$-mesons production in $γγ^*$ collision

Details Exclusive two $ρ^0$-mesons production in $γγ^*$ collision Exclusive two $ρ^0$-mesons production in $γγ^*$ collision

2003-05-17

arxiv.org/abs/hep-ph/0305194v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 1 eps figure

Scientific paper

10.1016/S0920-5632(03)02344-2

We give a theoretical description of the L3 Collaboration data on the cross-section of the exclusive two $\rho$-mesons production in $\gamma\gamma ^*$ collision with large photon virtuality. These data prove the scaling behaviour of the leading twist generalized distribution amplitude of vector mesons. They thus prove the relevance of a partonic description of the exclusive process $\gamma\gamma ^*\to\rho ^0\rho ^0$ at $Q^2\geq 1.2 {\rm GeV^2}$ and $W\leq 3.0 {\rm GeV}.$

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