Chiral effective field theory on the light front
نویسنده
چکیده
We propose a new approach to describe baryonic structure in terms of an effective chiral Lagrangian. The state vector of a baryon is defined on the light front of general position ω·x = 0, where ω is an arbitrary light-like four vector. It is then decomposed in Fock components including an increasing number of pions. The maximal number of particles in the state vector is mapped out to the order of decomposition of the chiral effective Lagrangian to have a consistent calculation of both the state vector and the effective Lagrangian. An adequate Fock sector dependent renormalization scheme is used in order to restrict all contributions within the truncated Fock space. To illustrate our formalism, we calculate the anomalous magnetic moment of a fermion in the Yukawa model in the three-body truncation. We present perspectives opened by the use of a new regularization scheme based on the properties of fields as distributions acting on specific test functions.
منابع مشابه
Chiral Symmetry in Light-front QCD
The definition of chiral transformations in light-front field theory is very different from the conventional form in equal-time formalism. We study the consistency of chiral transformations and chiral symmetry in light-front QCD and derive a complete new light-front axial-vector current for QCD. The breaking of chiral symmetry in light-front QCD is only associated with helicity flip interaction...
متن کاملRedoing Nuclear Physics on the Light Front
A light front field theory treatment of a chiral lagrangian is applied to pion-nucleon and nucleon-nucleon scattering.
متن کاملNuclear Lattice Simulations with Chiral Effective Field Theory
We present recent results on lattice simulations using chiral effective field theory. In particular we discuss lattice simulations for dilute neutron matter at next-to-leading order and three-body forces in light nuclei at next-to-next-to-leading order.
متن کاملEffective Field Theories for Quantum Chromodynamics on the Lattice
Light and heavy-light (b) hadrons are among the most interesting and among the most challenging quantities to calculate in lattice gauge theory. One would like to avoid discretization effects from very heavy quarks and to calculate chiral extrapolations and calculate finite volume effects from light quarks. For this one uses effective theories: Chiral Perturbation Theory and Nonrelativistic QCD...
متن کاملOne - loop effective potential of N = 1 supersymmetric theory and decoupling effects
We study the decoupling effects in N = 1 (global) supersymmetric theories with chiral superfields at the one-loop level. Examples of gauge neutral chiral superfields with minimal (renormalizable) as well as non-minimal (non-renormalizable) couplings are considered, and decoupling in gauge theories with U (1) gauge superfields that couple to heavy chiral matter is studied. We calculate the one-l...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2009