TY - JOUR

T1 - Spontaneous parity violation under extreme conditions: an effective lagrangian analysis

AU - Andrianov, A.A.

AU - Andrianov, V.A.

AU - Espriu, D.

PY - 2014

Y1 - 2014

N2 - 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 (presumably QCD or techni-QCD). The analysis at intermediate energy scales is done by using an extended σ-model lagrangian that includes two scalar and two pseudoscalar multiplets and fulfills low-energy constraints for vector-like gauge theories. We elaborate on a novel mechanism of parity breaking based on the interplay between lightest and heavier meson condensates, which therefore cannot be realized in the simplest σ model. The results are relevant for idealized homogeneous and infinite nuclear (quark or techniquark) matter where the influence of the density can be examined with the help of a constant chemical potential. The model is able to describe satisfactorily the firstorder phase transition to stable nuclear matter, and it predicts a second-order phase transition to a state where parity is spontaneously broken. We argue that the

AB - 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 (presumably QCD or techni-QCD). The analysis at intermediate energy scales is done by using an extended σ-model lagrangian that includes two scalar and two pseudoscalar multiplets and fulfills low-energy constraints for vector-like gauge theories. We elaborate on a novel mechanism of parity breaking based on the interplay between lightest and heavier meson condensates, which therefore cannot be realized in the simplest σ model. The results are relevant for idealized homogeneous and infinite nuclear (quark or techniquark) matter where the influence of the density can be examined with the help of a constant chemical potential. The model is able to describe satisfactorily the firstorder phase transition to stable nuclear matter, and it predicts a second-order phase transition to a state where parity is spontaneously broken. We argue that the

KW - Spontaneous parity violation

KW - extreme conditions

KW - effective lagrangian

KW - strong interactions

KW - heavy ion collisions

U2 - 10.1140/epjc/s10052-014-2932-1

DO - 10.1140/epjc/s10052-014-2932-1

M3 - Article

VL - 74

SP - 1

EP - 23

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 6

ER -