The half-skyrmion phase in a chiral-quark model

Abstract

The Chiral Dilaton Model, where baryons arise as non-topological solitons built from the interaction of quarks and chiral mesons, shows in the high density low temperature regime a two phase scenario in the nuclear matter phase diagram. Dense soliton matter described by the Wigner-Seitz approximation generates a periodic potential in terms of the sigma and pion fields that leads to the formation of a band structure. The analysis up to three times nuclear matter density shows that soliton matter undergoes two separate phase transitions: a delocalization of the baryon number density leading to $B=1/2$ structures, as in skyrmion matter, at moderate densities, and quark deconfinement at larger densities. This description fits well into the so-called quarkyonic phase where, before deconfinement, nuclear matter should undergo structural changes involving the restoration of fundamental symmetries of QCD.

6 pages 4 figures

References in corpus (8)

• The QCD equation of state with dynamical quarks
• The transition temperature in QCD
• Hadron Production in Ultra-relativistic Nuclear Collisions: Quarkyonic Matter and a Triple Point in the Phase Diagram of QCD
• Non-perturbative methods for a chiral effective field theory of finite density nuclear systems
• Study of the finite temperature transition in 3-flavor QCD using the R and RHMC algorithms
• The Role of the Dilaton in Dense Skyrmion Matter
• A chiral lagrangian with Broken Scale: testing the restoration of symmetries in astrophysics and in the laboratory
• A chiral quark-soliton model with broken scale invariance for nuclear matter

Cited by in corpus (4)

• Baryon chemical potential and in-medium properties of BPS skyrmions
• Fractionalized Quasiparticles in Dense Baryonic Matter
• Mapping topology to nuclear dilaton-HLS effective field theory for dense baryonic matter
• Mapping topology of skyrmions and fractional quantum Hall droplets to nuclear EFT for ultra-dense baryonic matter