6 papers · 1 filter
Neutral pion decay into in dense skyrmion matter
Alexander C. Kalloniatis, Jonathan D. Carroll, Byung-Yoon Park
We study the weak decay of the neutral pion to a neutrino-antineutrino pair, , in the Skyrme model. In baryon free-space the process is forbidden by helicity while i…
Neutral pion decay in dense skyrmion matter
Alexander C. Kalloniatis, Byung-Yoon Park
We study the density dependence of the decay using the Skyrme Lagrangian to describe simultaneously both the matter background and mesonic fluctuations. Pion properties…
Spectral density in resonance region and analytic confinement
Alex C. Kalloniatis, Sergei N. Nedelko, Lorenz von Smekal
We study the role of finite widths of resonances in a nonlocal version of the Wick-Cutkosky model. The spectrum of bound states is known analytically in this model and forms linear…
Axial U(1) and spontaneous chiral symmetry breaking within a confining model of the QCD vacuum
A. C. Kalloniatis, S. N. Nedelko
A model for the QCD vacuum based on domain-like background gluon fields has previously been developed and demonstrated to exhibit confinement of quarks and strong correlation of th…
Quark determinant in domain-like gluon fields
A. C. Kalloniatis, S. N. Nedelko
We address the computation of the determinant for the Dirac operator corresponding to a quark propagating in a background gluon field of the following type: the gauge field is cova…
On Domain-like Structures in the QCD Vacuum
A. C. Kalloniatis, S. N. Nedelko
We suggest that clusters or domains of topological charge and action density occur in the QCD vacuum as an effect of singularities in gauge fields and can simultaneously lead to co…