Bound diquarks and their Bose-Einstein condensation in strongly coupled quark matter

Abstract

We explore the formation of diquark molecules and their Bose-Einstein condensation (BEC) in the phase diagram of three-flavor quark matter at nonzero temperature, T, and quark chemical potential, mu. Using a quark model with a four-fermion interaction, we identify possible diquark excitations as poles of the microscopically computed diquark propagator. The quark masses are obtained by solving a dynamical equation for the chiral condensate and are found to determine the stability of the diquark excitations. The stability of diquark excitations is investigated in the T-mu plane for different values of the diquark coupling strength. We find that bound diquark molecules appear at small quark chemical potentials at intermediate coupling and that BEC of non-strange diquark molecules occurs if the attractive interaction between quarks is sufficiently strong.

7 pages, 6 figures

References in corpus (29)

• The QCD transition temperature: results with physical masses in the continuum limit
• Color superconducting quark matter
• Chemical Equilibration in Pb+Pb Collisions at the SPS
• The Quark-Gluon Plasma in Equilibrium
• The transition temperature in QCD
• The phase diagram of neutral quark matter: Self-consistent treatment of quark masses
• Gapless two-flavor color superconductor
• The phase diagram of three-flavor quark matter under compact star constraints
• Gapless Color-Flavor-Locked Quark Matter
• Two lectures on color superconductivity
• Chiral and Color-superconducting Phase Transitions with Vector Interaction in a Simple Model (Addenda)
• Chiral and Color-superconducting Phase Transitions with Vector Interaction in a Simple Model
• BEC-BCS Crossover in the Nambu--Jona-Lasinio Model of QCD
• Color-Flavor Unlocking and Phase Diagram with Self-Consistently Determined Strange Quark Masses
• BCS-BEC crossover in a relativistic superfluid and its significance to quark matter
• Phase diagram of dense neutral three-flavor quark matter
• Precursor of Color Superconductivity in Hot Quark Matter
• BCS/BEC crossover in Quark Matter and Evolution of its Static and Dynamic properties
• Structural Change of Cooper Pairs and Momentum-dependent Gap in Color Superconductivity
• Relativistic BCS-BEC crossover in a boson-fermion model
• Nonlinear sigma model approach for phase disorder transitions and the pseudogap phase in chiral Gross-Neveu, Nambu-Jona-Lasinio models and strong-coupling superconductors
• Pseudogap of Color Superconductivity in Heated Quark Matter
• Relativistic BCS-BEC Crossover at Finite Temperature and Its Application to Color Superconductivity
• Pre-critical Phenomena of Two-flavor Color Superconductivity in Heated Quark Matter -- diquark-pair fluctuations and non-Fermi liquid behavior --
• Thermal Phase Transitions and Gapless Quark Spectra in Quark Matter at High Density
• Spatial structure of quark Cooper pairs in a color superconductor
• Diquark Bose-Einstein condensation
• Diquarks in the color--flavor locked phase of dense quark matter
• Bose-Einstein condensation of diquark molecules in three-flavor quark matter

Cited by in corpus (28)

• Color superconductivity in dense quark matter
• The NJL model of dense three-flavor matter with axial anomaly: the low temperature critical point and BEC-BCS diquark crossover
• Three-flavor Nambu--Jona-Lasinio model at finite isospin chemical potential
• Universality of Phases in QCD and QCD-like Theories
• Singular values of the Dirac operator in dense QCD-like theories
• Phase diagram of two-color quark matter at nonzero baryon and isospin density
• Nambu-Jona-Lasinio model description of weakly interacting Bose condensate and BEC-BCS crossover in dense QCD-like theories
• BEC-BCS crossover in a cold and magnetized two color NJL model
• Role of two-flavor color superconductor pairing in a three-flavor Nambu--Jona-Lasinio model with axial anomaly
• Color neutrality effects in the phase diagram of the PNJL model
• BCS-BEC crossover in three-dimensional Fermi gases with spherical spin-orbit coupling
• Baryon formation and dissociation in dense hadronic and quark matter
• Strongly interacting Fermi systems in 1/N expansion: From cold atoms to color superconductivity
• BCS-BEC crossover in relativistic Fermi systems
• BCS BEC crossover and phase structure of relativistic system: a variational approach
• BCS-BEC crossover in a relativistic boson-fermion model beyond mean field approximation
• Magnetic Tuning of the Relativistic BCS-BEC Crossover
• Relativistic BCS-BEC crossover of a two-species Fermi gas with number density asymmetry at zero temperature
• Optimized perturbation theory applied to the study of the thermodynamics and BEC-BCS crossover in the three-color Nambu--Jona-Lasinio model
• Equation of State in a Strongly Interacting Relativistic System
• BCS-BEC Crossover and Stability in a Nambu-Jona-Lasinio Model with Diquark-Diquark Repulsion
• Diquarks in the nilpotency expansion of QCD and their role at finite chemical potential
• Bose-Einstein condensation in strong-coupling quark color superconductor near flavor SU(3) limit
• Some aspects of color superconductivity: an introduction
• Combined chiral and diquark fluctuations along QCD critical line and enhanced baryon production with parity doubling
• Pairing fluctuation effects in a strongly coupled color superfluid/superconductor
• Some recent progress on quark pairings in dense quark and nuclear matter
• Possible crossover from BCS superconductivity to Bose-Einstein condensate in quark matter