TY - JOUR

T1 - Stellar matter with pseudoscalar condensates

AU - Andrianov, A. A.

AU - Andrianov, V. A.

AU - Espriu, D.

AU - Kolevatov, S. S.

PY - 2016

Y1 - 2016

N2 - 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 well as other thermodynamic characteristics. We adopt the hypothesis that in regions where the pseudoscalar density gradient is large the properties of photons and fermions are governed by the usual lagrangian extended with a Chern–Simons interaction for photons and a constant axial field for fermions. We find that these new pieces in the lagrangian produce non-trivial reflection coefficients both for photons and fermions when entering or leaving a region where the pseudoscalar has a non-zero gradient. A varying pseudoscalar density may also lead to instability of some fermion and boson modes and modify some properties of the Fermi sea.We speculate that some of these modifications could influence the cooling rate of stellar matter (for instance in compact stars) and have other observable consequences. While quantitative results may

AB - 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 well as other thermodynamic characteristics. We adopt the hypothesis that in regions where the pseudoscalar density gradient is large the properties of photons and fermions are governed by the usual lagrangian extended with a Chern–Simons interaction for photons and a constant axial field for fermions. We find that these new pieces in the lagrangian produce non-trivial reflection coefficients both for photons and fermions when entering or leaving a region where the pseudoscalar has a non-zero gradient. A varying pseudoscalar density may also lead to instability of some fermion and boson modes and modify some properties of the Fermi sea.We speculate that some of these modifications could influence the cooling rate of stellar matter (for instance in compact stars) and have other observable consequences. While quantitative results may

KW - Parity breaking in strong interactions

KW - QCD

KW - heavy ion collisions

KW - stellar matter

U2 - 10.1140/epjc/s10052-016-4012-1

DO - 10.1140/epjc/s10052-016-4012-1

M3 - Article

VL - 76

SP - 1

EP - 13

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 169

M1 - 169

ER -