524 citations · 3.4k across the 106 of their papers we have counts for
49 papers · 1 filter
Natural cancellation of powerlike divergences in the SM by dark matter through gauged Higgs portal
S. S. Afonin, A. A. Andrianov, V. A. Andrianov +1
We discuss the connection between the vacuum energy problem and the number of dark matter sectors and its relation to the cancellation of quadratic divergences both in the cosmolog…
Vector mesons spectrum in a medium with a chiral imbalance induced by the vacuum of fermions
Vladimir Kovalenko, Alexander Andrianov, Vladimir Andrianov
The properties of the light vector mesons in the presence of local parity breaking medium with a chiral imbalance are considered in the vector-meson dominance model. Applying the f…
Chiral perturbation theory in the environment with chiral imbalance
A. A. Andrianov, V. A. Andrianov, D. Espriu
We discuss the description of chiral imbalance imprint in pion matter. It is based on the Chiral Perturbation Theory supplemented by medium induced chiral chemical potential in the…
Exotic meson decays in the environment with chiral imbalance
A. A. Andrianov, V. A. Andrianov, D. Espriu +2
An emergence of Local Parity Breaking (LPB) in central heavy-ion collisions (HIC) at high energies is discussed. LPB in the fireball can be produced by a difference between the num…
Decays of light mesons triggered by chiral chemical potential
A. A. Andrianov, V. A. Andrianov, D. Espriu +2
Light meson ( ) properties in the environment with chiral imbalance are analyzed with the help of meson effective Lagrangian associated with QCD. New spatial parity vi…
Stellar matter with pseudoscalar condensates
A. A. Andrianov, V. A. Andrianov, D. Espriu +1
In this work we consider how the appearance of gradients of pseudoscalar condensates in dense systems may possibly influence the transport properties of photons in such a medium as…
The masses of vector mesons in holographic QCD at finite chiral chemical potential
S. S. Afonin, A. A. Andrianov, D. Espriu
Central heavy-ion collisions may induce sizeable fluctuations of the topological charge. This effect is expected to distort the dispersion relation for the hadron masses. We constr…
Effects of pseudoscalar condensation on the cooling of neutron stars
A. A. Andrianov, D. Espriu, S. S. Kolevatov
In this work we consider the effect that the appearance of pseudoscalar condensates in a neutron star can have on its cooling rate. We make no particular assumption on the origin a…
Analysis of dilepton angular distributions in a parity breaking medium
Alexander A. Andrianov, Vladimir A. Andrianov, Domenec Espriu +1
We investigate how local parity breaking (LPB) due to large topological fluctuations may affect hadron physics. A distorted dispersion relation is derived for the lightest vector m…
An effective theory for QCD with an axial chemical potential
Alexander A. Andrianov, Vladimir A. Andrianov, Domenec Espriu +1
We consider the low energy realization of QCD in terms of meson fields when an axial chemical potential is present; a situation that may be relevant in heavy ion collisions. We sha…
Implications of local parity breaking in heavy ion collisions
Alexander A. Andrianov, Vladimir A. Andrianov, Domenec Espriu +1
Recent data on dilepton production in heavy ion collisions revealed an abnormal excess in the region of invariant masses below 1 GeV. Our proposal is the creation of a slowly varyi…
Chemical potentials and parity breaking: the Nambu-Jona-Lasinio model
Alexander A. Andrianov, Domenec Espriu, Xumeu Planells
We consider the "two flavour" Nambu--Jona-Lasinio model in the presence of a vector and an axial external chemical potentials and study the phase structure of the model at zero tem…
Passing the boundary between the parity breaking medium and vacuum by vector particles
A. A. Andrianov, S. S. Kolevatov
The electrodynamics supplemented with a Chern-Simons (CS) action (Carrol-Field-Jackiw electrodynamics) in a half space is studied. The passage of photons and/or massive vector meso…
Spontaneous parity violation in extreme conditions: an effective lagrangian analysis
A. A. Andrianov, V. A. Andrianov, D. Espriu
We investigate how large baryon densities (and possibly high temperatures) may induce spontaneous parity violation in the composite meson sector of vector-like gauge theory (presum…
An effective QCD Lagrangian in the presence of an axial chemical potential
Alexander A. Andrianov, Domenec Espriu, Xumeu Planells
We consider the low energy realization of QCD in terms of mesons when an axial chemical potential is present; a situation that may be relevant in heavy ion collisions. We shall dem…
Propagation of photons and massive vector mesons between a parity breaking medium and vacuum
A. A. Andrianov, S. S. Kolevatov, R. Soldati
The problem of propagation of photons and massive vector mesons in the presence of Lorenz and CPT invariance violating medium is studied when the parity-odd medium is bounded by a…
Abnormal dilepton yield from parity breaking in dense nuclear matter
Alexander Andrianov, Vladimir Andrianov, Domenec Espriu +1
At finite density parity can be spontaneously broken in strong interactions with far reaching implications. In particular, a time-dependent pseudoscalar background would modify QED…
Abnormal dilepton yield from local parity breaking in heavy-ion collisions
Alexander Andrianov, Vladimir Andrianov, Domenec Espriu +1
We propose a novel explanation for the dilepton excess observed in heavy ion collisions at invariant masses below 1 GeV. We argue that the presence of local parity breaking due to…
The axion shield
A. Andrianov, D. Espriu, F. Mescia +1
We investigate the propagation of a charged particle in a spatially constant, but time dependent, pseudoscalar background. Physically this pseudoscalar background could be provided…
Anomalous positron excess from Lorentz-violating QED
Alexander A. Andrianov, Domenec Espriu, Paola Giacconi +1
We entertain the idea that a suitable background of cold (very low momentum) pseudoscalar particles or condensate, may trigger a background that effectively generates Lorentz-invar…
Spontaneous P-violation in QCD in extreme conditions
A. A. Andrianov, V. A. Andrianov, D. Espriu
We investigate the possibility of parity being spontaneously violated in QCD at finite baryon density and temperature. The analysis is done for an idealized homogeneous and infinit…
Parity doubling from Weinberg sum rules
A. A. Andrianov, D. Espriu
We investigate the relation among slopes and intercepts of Regge trajectories for mesons of a given spin and different parities using large N_c arguments and the matching to pertur…
Spontaneous P-parity violation in dense baryon matter
S. S. Afonin, A. A. Andrianov, V. A. Andrianov +1
We investigate possibilities for dynamical P-parity violation in dense baryon matter in the framework of effective quark models. Dynamical P-parity violation can appear in models w…
On the possibility of P-violation at finite baryon-number densities
A. A. Andrianov, D. Espriu
We show how the introduction of a finite baryon density may trigger spontaneous parity violation in the hadronic phase of QCD. Since this involves strong interaction physics in an…