Nonperturbative relativistic approach to pion form factor: predictions for future JLab experiments

Details Nonperturbative relativistic approach to pion form factor: predictions for future JLab experiments Nonperturbative relativistic approach to pion form factor: predictions for future JLab experiments

2009-10-19

arxiv.org/abs/0910.3604v2

Phys.Rev.C80:055210,2009

Physics

Nuclear Physics

Nuclear Theory

6 pages, 2 figures, revtex

Scientific paper

10.1103/PhysRevC.80.055210

Some predictions concerning possible results of the future JLab experiments on the pion form factor F_pi(Q^2) are made. The calculations exploit the method proposed previously by the authors and based on the instant-form Poincare invariant approach to pion considered as a quark-antiquark system. Long ago, this model has predicted with surprising accuracy the values of F_pi(Q^2) measured later in JLab experiment. The results are almost independent from the form of wave function. The pion mean square radius and the decay constant f_pi also agree with experimental values. The model gives power-like asymptotic behavior of F_pi(Q^2) at high momentum transfer in agreement with QCD predictions.

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