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Particles and Fields


Eur. Phys. J. C 20, 71-76
DOI: 10.1007/s100520100642

On a possible estimation of the constituent-quark parameters from Jefferson Lab experiments on the pion form factor

A.F. Krutov1 and V.E. Troitsky2

1  Samara State University, Ac. Pavlov St., 1, 443011 Samara, Russia
2  Nuclear Physics Institute, Moscow State University, Vorobjevy Gory, 119899 Moscow, Russia

(Received: 3 April 2000 / Revised version: 25 February 2001 / Published online: 25 April 2001 -© Springer-Verlag / Società Italiana di Fisica 2001 )

Abstract
The charge form factor of the pion is calculated for the momentum transfer range of the Jefferson Lab experiments. The approach is based on the instant form of the relativistic Hamiltonian dynamics. It is shown that the form-factor dependence on the choice of the model for the quark wave function in the pion is weak, while the dependence on the constituent-quark mass is rather significant. It is possible to estimate the mass of the constituent quark and the sum of the anomalous magnetic moments of the u- and $\bar d$-quarks from the JLab experiments.



© Società Italiana di Fisica, Springer-Verlag 2001