We show that within a recently developed nonlocal, chiral quark model the critical density for phase transition to color superconducting matter under neutron star conditions can be low enough these phases occur in compact configurations with masses below $1.3\phantom{\rule{0.3em}{0ex}}{M}_{\ensuremath{\bigodot}}$. study cooling of objects isolation different values gravitational mass. Our equation state (EoS) allows two-flavor superconductivity (2SC) large gap...

Instability of the charged pion vacuum resulting in condensation is studied within <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>λ</a:mi><a:mo stretchy="false">|</a:mo><a:mi>ϕ</a:mi><a:msup><a:mo stretchy="false">|</a:mo><a:mn>4</a:mn></a:msup></a:math> model at rapid rotation system presence external fields. Case static scalar and electric square potential wells uniform magnetic field detail. The Meissner Aharonov-Bohm effects London moment are taken into...

The instability of electron-positron vacuum in strong electric fields is studied. First, falling to the Coulomb center discussed at Z&gt;137/2 for a spinless boson and Z&gt;137 electron. Subsequently, focus concentrated on description deep electron levels spontaneous positron production field finite-size nucleus with charge Z&gt;Zcr≃170. Next, these effects are studied application low-energy heavy-ion collisions. we consider phenomenon “electron condensation” upper continuum crossed boundary...

Shear $\ensuremath{\eta}$ and bulk $\ensuremath{\zeta}$ viscosities are calculated in a quasiparticle model within relaxation-time approximation for pure gluon matter. Below ${T}_{c}$, the confined sector is described glueball model. The constructed equation of state reproduces first-order phase transition glue It shown that with this state, it possible to describe temperature dependence shear viscosity entropy ratio $\ensuremath{\eta}/s$ $\ensuremath{\zeta}/s$ reasonable agreement available...

Possibilities of the formation pion-sigma meson field vortices in a rotating empty vessel (in vacuum) and Bose-Einstein condensates at dynamically fixed particle number are studied within linear $\ensuremath{\sigma}$ model zero temperature. The charged $\ensuremath{\sigma}{\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ neutral $\ensuremath{\sigma}{\ensuremath{\pi}}^{0}$ complex Ans\"atze (models 1 2) studied. First it is analyzed which these configurations energetically favorable case...

Neutrino emission in the processes of breaking and formation nucleon Cooper pairs is calculated framework Larkin-Migdal Leggett approaches to description superfluid Fermi liquids at finite temperatures. We explain peculiarities both explicitly demonstrate that they lead same expression for emissivity pair processes.

HADES data on a strangeness production in Ar+KCl collisions at 1.76A GeV are analyzed within minimal statistical model. The total negative content is fixed by the observed K^+ multiplicities event-by-event basis. Particles with assumed to remain chemical equilibrium themselves and thermal environment until common freeze-out. Exact conservation each collision event explicitly preserved. This implies that Xi baryons can be released only events where two or more kaons produced. An increase of...

We consider the model of composite dark matter assuming stable particles charge $-2$ bound with primordial helium nuclei by Coulomb force in $O$He atoms. study capture such atoms and propose a possibility existence $O$-enriched superheavy $O$-nuclearites, which heavy $O$-dark fermions are electromagnetic forces ordinary nuclear matter. accumulation stars its possible effect stellar evolution is also considered, extending set indirect probes for

$S$-wave pion-nucleon interactions in the linear sigma model, and Manohar-Georgi Gasser-Sainio-Svarc models with finite number of terms Lagrangians, as well a general phenomenological approach are reviewed. Subtleties associated current algebra theorems field redefinitions discussed. In first third most likely $s$-wave pion condensation isospin-symmetric matter does not occur at least up to high densities, whereas within second model it may appear already moderate densities. two...

This article reviews positive and negative time delays in various processes of classical quantum physics. In the beginning, we demonstrate how a time-shifted response system to an external perturbation appears mechanics electrodynamics. Then quantify durations mechanical processes. The duration tunneling is studied, interpretation Hartmann paradox suggested. Time advances appearing three-dimensional scattering problem on central potential are considered. We then discuss field theory after...