2020 Impact factor 4.590
Particles and Fields

Eur. Phys. J. C 25, 277-286 (2002)
DOI: 10.1007/s10052-002-0996-9

Recent experimental data and the size of the quark in the constituent quark model

S. Bondarenko1, E. Levin1 and J. Nuiri2

1  HEP Department, School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Science, Tel-Aviv University, 69978 Ramat Aviv, Israel
2  Research Institute for Particle and Nuclear Physics, P.O. Box 49, 1525 Budapest, Hungary

(Received: 14 April 2002 / Published online: 9 August 2002 )

We use the constituent quark model (CQM) to describe CDF data on double parton cross section and HERA data on the $ J / \Psi$ 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, $R^2_{\mathrm {{quark}}} \approx 0.1$ GeV -2, in accordance with the assumption on which CQM is based.

© Società Italiana di Fisica, Springer-Verlag 2002