9 papers
Static linear response of hot and dense QCD matter to electromagnetic fields: Leading hard and soft QCD corrections
Osvaldo Ferreira, Eduardo S. Fraga, Tyler Gorda +3
We compute the static electromagnetic susceptibilities of a hot and dense quark-gluon plasma using perturbative Quantum Chromodynamics (QCD). Our evaluation includes the leading $\…
Semi-analytic bounds on axion-like-particle supernovae emission
Ana Luisa Foguel, Eduardo S. Fraga
Core-collapse supernovae provide natural laboratories for the production of new light particles. In particular, axion-like particles (ALPs) can be constrained via SN1987A cooling a…
Signatures from pion condensation and lepton flavor asymmetries in the cosmological gravitational wave background
Osvaldo Ferreira, Eduardo S. Fraga, Jürgen Schaffner-Bielich +1
Large lepton flavor asymmetries at the QCD epoch could generate a pion condensation phase in the early Universe. For large enough tau lepton flavor asymmetries, the speed of sound…
Cooling of quark stars from perturbative QCD
Ãrsula Fonseca, Eduardo S. Fraga
We investigate the thermal evolution of quark stars with and without a hadronic crust using an equation of state derived from perturbative QCD that incorporates the running of the…
Susceptibilities and Taylor coefficients of magnetic QCD from perturbation theory
Eduardo S. Fraga, LetÃcia F. Palhares, Tulio E. Restrepo
We compute the coefficients and of the Taylor expansion for the pressure in powers of in the presence of a large magnetic field within perturbative Q…
Chiral symmetry breaking and pion condensation in the early universe
Osvaldo Ferreira, Eduardo S. Fraga, MaurÃcio Hippert +1
We determine the possible trajectories the universe may have followed in the QCD phase diagram during the QCD epoch. We focus on the roles of chiral symmetry breaking and pion cond…