出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We propose a general framework to calculate the non-perturbative structure of relativistic bound state systems. The state vector of the bound state is calculated in the covariant formulation of light-front dynamics. In this scheme, the state vector is defined on the light front of general position w · x = 0, where w is an arbitrary light-like four vector. This enables a strict control of any violation of rotational invariance. The state vector is then decomposed in Fock components. Our formalism is applied to the description of the nucleon properties at low energy, in chiral perturbation theory. We also present here an example of the nucleon self-energy calculation within the so-called Taylor-Lagrange regularization scheme, and show that it is very adequate in order to treat divergences in this non-perturbative framework.
