Formation of quark phases in protoneutron stars: the transition from the 2SC to the normal quark phase

Abstract

We study the process of formation of quark phases in protoneutron stars. After calculating the phase transition between nucleonic matter and the 2SC phase at fixed entropy and lepton fraction, we show that an unpairing transition between the 2SC phase and the normal quark phase occurs for low lepton fractions. We then calculate the process of diffusion of neutrinos in protoneutron stars and show that for intermediate values of the mass of the star, the deleptonization triggers the phase transition between the two quark phases after a temporal delay of a few seconds. In less massive stars instead only the normal quark phase is formed at the end of the deleptonization stage. We also discuss the possible astrophysical implications of our scenario.

9 pages, 9 figures

References in corpus (8)

• Shapiro delay measurement of a two solar mass neutron star
• Color superconductivity in dense quark matter
• Signals of the QCD phase transition in core-collapse supernovae
• Testing Deconfinement at High Isospin Density
• Stability of CFL cores in Hybrid Stars
• The quark core of protoneutron stars in the phase diagram of quark matter
• A new possible quark-hadron mixed phase in protoneutron stars
• Formation of quark phases in compact stars and SN explosion