We study the effect of the chiral phase transition on pion production in hot hadronic matter. The phase of restored chiral symmetry is characterized by the appearance of the scalar σ-meson as a chiral partner of the pion as well as by the degeneracy of the vector and axial-vector mesons. We find rapid thermal and chemical equilibration of these degrees of freedom in the symmetric phase. Provide...

We consider the photonic vortical effect, i.e., difference of flows left- and right-handed photons along vector angular velocity in rotating medium. Two alternative frameworks to evaluate effect are considered, both which have already been tried literature: first, standard thermal field theory and, alternatively, Hawking-radiation-type derivation. In our earlier attempt compare two approaches, ...

The role of effective degrees of freedom on the vector and axial-vector susceptibilities and the pion velocity at chiral restoration is analyzed. We consider two possible scenarios, one in which pions are considered to be the only low-lying degrees of freedom – that we shall refer to as “standard” – and the other in which pions, vector mesons and constituent quarks (or quasiquarks in short) are...

an efficient one-pot three-component procedure for the synthesis of new chiral spiro-oxindolopyrrolizidines with highly regio-, diastereo-, and enantioselective from 1,3-dipolar cycloaddition of azomethine ylides and optically pure active cinamoyl oxazolidinone are described. the process occurs at room temperature in aqueous ethanol as green solvent and in the absence of any bidentate chelating...

In this paper, we discuss the transition to the semiclassical regime in excited hadrons, and consequently, the restoration of chiral symmetry for these states. We use a generalised Nambu–Jona-Lasinio model with the interaction between quarks in the form of the instantaneous Lorentz–vector confining potential. This model is known to provide spontaneous breaking of chiral symmetry in the vacuum v...

We study the weak vector and axial-vector form factors of firstand second-class currents for the semileptonic octet baryon decays in the spirit of the chiral quark model. Our results for the weak magnetism form factors are consistent with the conserved vector current (CVC) results. The induced pseudotensor form factors, which are highly model dependent, are small. The overall performance of the...

Electromagnetic interactions are incorporated into Heavy Hadron Chiral Perturbation Theory. Short and long distance magnetic moment contributions to the chiral Lagrangian are identified, and M1 radiative decays of heavy vector mesons and sextet baryons are studied. Using recent CLEO D branching fraction ratio data, we fit the meson coupling to the axial vector Goldstone current and find g 1 = 0...

We calculate the vector meson masses in Nf = 2+ 1 Wilson chiral perturbation theory at next-to-leading order. Generalizing the framework of heavy vector meson chiral perturbation theory, the quark mass and the lattice cutoff dependence of the vector meson masses is derived. Our chiral order counting assumes that the lattice cut-off artifacts are of the order of the typical pion momenta, p ∼ aΛ2...

Assuming that the chiral symmetry of the light degrees of freedom is realized as the vector symmetry proposed by Georgi, we write down a chiral Lagrangian for heavy mesons which incorporates both heavy quark and vector symmetry. Some of the phenomenological implications of this idea are considered. (submitted to Physics Letters B) ∗supported by Deutsche Forschungsgemeinschaft