Pauli-blocking Effect in a Quark Model

Details Pauli-blocking Effect in a Quark Model Pauli-blocking Effect in a Quark Model

2002-09-21

arxiv.org/abs/hep-ph/0209247v1

Nucl.Phys. A723 (2003) 408-426

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 12 figures

Scientific paper

10.1016/S0375-9474(03)01434-9

Pauli-Blocking effect on the kinetic term is investigated by employing the quark cluster model. The effect can be understood by the change of the degrees of the mixing between the incoming wave and the 0$\ell$ state of the inter-cluster wave function, which can be expressed by a potential which is highly nonlocal. We look into the properties of this effect by comparing equivalent local potentials. In the channel where the Pauli-blocking effect is small, the on-shell equivalent local potential simulates the nonlocal potential well even for the off-shell behavior. On the other hand, the off-shell behavior is very different from the original one where the effect is large. This off-shell behavior, however, can well be simulated by considering the nonlocal matrix elements only between the $0s$ state and the other states. The energy dependent potentials are also constructed and found to be helpful to understand the energy dependence of the effect.

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