Dynamical chiral symmetry breaking from variationally improved perturbative expansion
نویسندگان
چکیده
منابع مشابه
Borel convergence of the variationally improved mass expansion and dynamical symmetry breaking
A modification of perturbation theory, known as delta-expansion (variationally improved perturbation), gave rigorously convergent series in some D = 1 models (oscillator energy levels) with factorially divergent ordinary perturbative expansions. In a generalization of variationally improved perturbation appropriate to renormalizable, asymptotically free theories, we show that the large expansio...
متن کاملFermion determinant with dynamical chiral symmetry breaking
One -loop fermion determinant is discussed for the case in which dynamical chiral symmetry breaking caused by momentum dependent fermion self energy Σ(p2) take place. The obtained series generalizes the heat kernel expansion for hard fermion mass. PACS number(s): 03.65.Db, 11.10Ef, 11.30.Rd, 12.39.Fe In quantum field theory, 1-loop quantum correction of fermions is from fermion determinant. It ...
متن کاملAspects of Dynamical Chiral Symmetry Breaking
Dynamical chiral symmetry breaking is a nonperturbative phenomenon that may be studied using QCD’s gap equation. Model-independent results can be obtained with a nonperturbative and symmetry preserving truncation. The gap equation yields the massive dressed-quark propagator, which has a spectral representation when considered as a function of the current-quark mass. This enables an explication ...
متن کاملNon-perturbative Renormalization Group Approach to Dynamical Chiral Symmetry Breaking in Gauge Theories
We analyze the dynamical chiral symmetry breaking in gauge theories solely by the non-perturbative renormalization group, without recourse to the SchwingerDyson method. First, we briefly review the basic notions and formulation, and clarify its great feature that it gives a systematic approximation scheme without any divergent series nor serious gauge dependence, compared to other perturbative ...
متن کاملChiral Symmetry and Chiral Symmetry Breaking*
Lectures presented at the session on " Recent Developments in Quantum Field Theory and Statistical Mechanics " of the Les Houches Summer School of Theoretical Physics August 1982 *Nork supported by the
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 1998
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(97)01077-3