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Title: Light-front chiral effective field theory

We propose a general framework to calculate the nonperturbative 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 {omega} {center_dot} x = 0, where {omega} 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 show that the use of a recently proposed regularization scheme, the so-called Taylor-Lagrange regularization scheme, is very adequate in order to treat divergences in this nonperturbative framework.
Authors:
 [1] ;  [2]
  1. Laboratoire de Physique Corpusculaire (France)
  2. Samara State University (Russian Federation)
Publication Date:
OSTI Identifier:
22212626
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Atomic Nuclei; Journal Volume: 76; Journal Issue: 11; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; BOUND STATE; CHIRALITY; FIELD THEORIES; FOCK REPRESENTATION; NUCLEONS; PERTURBATION THEORY; RELATIVISTIC RANGE; ROTATIONAL INVARIANCE; VECTORS; VISIBLE RADIATION