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Recent experimental data and the size of the quark in the Constituent Quark Model

S. Bondarenko, E. Levin, J. Nuiri

hep-pharXiv:hep-ph/0204156

Abstract

We use the Constituent Quark Model (CQM) to describe CDF data on double parton cross section and HERA data on the J / Ψ ratio cross section of elastic and inelastic diffractive productions. Our estimate shows that the radius of the constituent quark turns out to be rather small, R2quark ≈ 0.1 Gev-2, in accordance with the assumption on which CQM is based.

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