Phase transition towards strange matter

Abstract

The phase diagram of a system constituted of neutrons and $\Lambda$-hyperons in thermal equilibrium is evaluated in the mean-field approximation. It is shown that this simple system exhibits a complex phase diagram with first and second order phase transitions. Due to the generic presence of attractive and repulsive couplings, the existence of phase transitions involving strangeness appears independent of the specific interaction model. In addition we will show under which conditions a phase transition towards strange matter at high density exists, which is expected to persist even within a complete treatment including all the different strange and non- strange baryon states. The impact of this transition on the composition of matter in the inner core of neutron stars is discussed.

10 pages, 8 figures

References in corpus (11)

• Shapiro delay measurement of a two solar mass neutron star
• Neutron Star Observations: Prognosis for Equation of State Constraints
• Estimation of the effect of hyperonic three-body forces on the maximum mass of neutron stars
• Isospin-dependent clusterization of Neutron-Star Matter
• Statistical description of complex nuclear phases in supernovae and proto-neutron stars
• Hot and dense hadronic matter in an effective mean field approach
• Cluster formation in compact stars: relativistic versus Skyrme models
• Light nuclei in supernova envelopes: a quasiparticle gas model
• Strangeness nuclear physics - 2010
• Is a soft nuclear equation of state extracted from heavy-ion data incompatible with pulsar data?
• Liquid-gas Phase Transition in Strange Hadronic Matter with Weak Y-Y Interaction

Cited by in corpus (17)

• Equations of state for supernovae and compact stars
• Equation of state of hypernuclear matter: impact of hyperon--scalar-meson couplings
• Constraining the onset density of the hadron-quark phase transition with gravitational-wave observations
• Nuclear Equation of state for Compact Stars and Supernovae
• Hyperons in neutron stars and supernova cores
• Physics input for modelling superfluid neutron stars with hyperon cores
• Equations of state for hot neutron stars -- II. The role of exotic particle degrees of freedom
• $\Delta$-admixed neutron stars: spinodal instabilities and dUrca processes
• Influence of pions and hyperons on stellar black hole formation
• Strangeness-driven phase transition in (proto)- neutron star matter
• Critical parameters of consistent relativistic mean-field models
• Examination of strangeness instabilities and effects of strange meson couplings in dense strange hadronic matter and compact stars
• Liquid-gas phase transition in strange hadronic matter with relativistic models
• A closer look at the Yukawa's interaction from a symmetry group perspective
• Phase diagram of neutron-rich nuclear matter and its impact on astrophysics
• Some aspects of the phase diagram of nuclear matter relevant to compact stars
• The role of strangeness and isospin in low density expansions of hadronic matter