Results 111 to 120 of about 278,956 (259)

Chiral Symmetry Breaking by Instantons

open access: yes, 1995
This is a review of the QCD instanton vacuum. After introducing instantons and their physical meaning, I show that the number of instantons in the vacuum fluctuates in accordance with the QCD trace anomaly. The main properties of the instanton ensemble are given.
openaire   +3 more sources

SU(2) Higher-order effective quark interactions from polarization

open access: yesPhysics Letters B, 2016
Higher order quark effective interactions are found for SU(2) flavor by departing from a non-local quark–quark interaction. By integrating out a component of the quark field, the determinant is expanded in chirally symmetric and symmetry breaking ...
Fábio L. Braghin
doaj   +1 more source

Parity doubling structure of nucleon at non-zero density in the holographic mean field theory

open access: yesEPJ Web of Conferences, 2014
We summarize our recent work in which we develope the holographic mean field approach to study the dense baryonic matter in a bottom-up holographic QCD model including baryons and scalar mesons in addition to vector mesons.
He Bing-Ran, Harada Masayasu
doaj   +1 more source

Chiral symmetry breaking in SQCD [PDF]

open access: yesPhysics Letters B, 1984
Abstract Using a spectral function sum rules approach, we derive some constraints among the Goldstone parameters, the lowest dimension vacuum condensates and the mass of the chiral matter superfield in supersymmetric QCD (SQCD). These relations are consistent with previous results on SQCD and complement them.
openaire   +2 more sources

Non-perturbative Renormalisation of Domain Wall Fermions: Quark Bilinears

open access: yes, 2001
We find the renormalisation coefficients of the quark field and the flavour non-singlet fermion bilinear operators for the domain wall fermion action, in the regularisation independent (RI) renormalisation scheme.
A. A. Khan   +42 more
core   +1 more source

Vector-Interaction-Enhanced Bag Model

open access: yesUniverse, 2018
A commonly applied quark matter model in astrophysics is the thermodynamic bag model (tdBAG). The original MIT bag model approximates the effect of quark confinement, but does not explicitly account for the breaking of chiral symmetry, an important ...
Mateusz Cierniak   +3 more
doaj   +1 more source

Dynamical Chiral-Symmetry Breaking in the Dual Ginzburg-Landau Theory [PDF]

open access: yesarXiv, 1994
We study the effect of QCD-monopole condensation on the dynamical chiral-symmetry breaking by using the dual Ginzburg-Landau theory of QCD. We formulate the Schwinger-Dyson equation and solve it numerically. The large enhancement is found for the chiral-symmetry breaking due to QCD-monopole condensation, which suggests the close relation between the ...
arxiv  

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