Higher Fock State Contributions to the Generalized Parton Distribution of Pion

Details Higher Fock State Contributions to the Generalized Parton Distribution of Pion Higher Fock State Contributions to the Generalized Parton Distribution of Pion

2006-03-23

arxiv.org/abs/hep-ph/0603198v2

Phys.Rev.D73:114013,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

References added

Scientific paper

10.1103/PhysRevD.73.114013

We discuss the higher Fock state (q \bar q g) contributions to the nonzero value of the pion GPD at the crossover point x = zeta between the DGLAP and ERBL regions. Using the phenomenological light-front constituent quark model, we confirm that the higher Fock state contributions indeed give a nonzero value of the GPD at the crossover point. Iterating the light-front quark model wave function of the lowest q \bar q Fock state with the Bethe-Salpeter kernel corresponding to the one-gluon-exchange, we include all possible time-ordered q \bar q g Fock state contributions and obtain the pion GPD satisfying necessary sum rules and continuity conditions.

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