The dynamics of topological domains which break parity (P) and charge-parity (CP) symmetry of QCD are studied. We derive in a general setting that those local domains will generate an axial current and quantify the strength of the induced axial current. Our findings are verified in a top-down holographic model. The relation between the real time dynamics of those local domains and the chiral ma...

If a baryon field belongs to a certain linear representation of chiral symmetry of SU(2)⊗SU(2), the axial coupling constant gA can be determined algebraically from the commutation relations derived from the superconvergence property of pion-nucleon scattering amplitudes. This establishes an algebraic explanation for the values of gA of such as the non-relativistic quark model, large-Nc limit an...

The present review paper consists of two main parts, which are not connected. first part is devoted to a general axisymmetric elastic–plastic plane stress solution, assuming polar anisotropy. Strains infinitesimal. principal trajectories coincide with the axes No restrictions imposed on yield criterion other than conventional criteria in plasticity. plastic portion strain rate tensor determined...

We emphasise the EMC spin effect as a problem of symmetry and discuss the renormalisation of the C = +1 axial tensor operators. This involves the generalisation of the Adler-BellJackiw anomaly to each of these operators. We find that the contribution of the axial anomaly to the spin dependent structure function g1(x,Q ) scales at O(αs). This means that the anomaly can be a large x effect in g1....

The properties of ρ-mesons at finite temperature (T ) are examined with an effective chiral lagrangian in which vector and axial-vector mesons are included as massive Yang-Mills fields of the chiral symmetry. It is shown that, at T 2 order, the effective mass is not changed but only the mixing effect in vector and axial-vector correlator appears. PACS numbers : 25.75+r, 11.10.Wx, 11.30.Rd Types...

Quark-meson duality for two-point functions of vector and axial-vector QCD currents is investigated in the large-Nc approximation. We find that the joint constraints of duality and chiral symmetry imply degeneracy of excited vector and axial-vector mesons in the large-Nc limit. We compare model-independent constraints with expectations based on the VenezianoLovelace-Shapiro string model. Severa...

It is numerically demonstrated by means of a magnetohydrodynamic code that precession can trigger dynamo action in a cylindrical container. Fixing the angle between the spin and the precession axis to be 1/2π, two limit configurations of the spinning axis are explored: either the symmetry axis of the cylinder is parallel to the spin axis (this configuration is henceforth referred to as the axia...