QMC model with density- and temperature- dependent quark masses Wei-Liang Qian Fudan University.

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Presentation transcript:

QMC model with density- and temperature- dependent quark masses Wei-Liang Qian Fudan University

Outline Motivation Motivation QHD models QHD models Bag model and QMC Bag model and QMC QMDTD QMDTD QMDTD with mesons QMDTD with mesons Numerical Result Numerical Result Conclusion Conclusion

Motivation To study nuclear matter in a model combining quark and meson degree of freedom To study nuclear matter in a model combining quark and meson degree of freedom Dynamic confinement/deconfinement mechanism Dynamic confinement/deconfinement mechanism

QHD QHD-I – a reasonable starting point for a study of nuclear matter QHD-I – a reasonable starting point for a study of nuclear matter

Nucl-th/

QHD ZM (Derivative scalar coupling) ZM (Derivative scalar coupling) Improved ZM (Tensor coupling, isovector meson) Improved ZM (Tensor coupling, isovector meson) QHD – II (Local gauge, Higgs mechanism) QHD – II (Local gauge, Higgs mechanism) FST (Nonlinear Chiral, Broken Scale Invariance, Vector Dominance) FST (Nonlinear Chiral, Broken Scale Invariance, Vector Dominance)

Models for Nuclear System QHD models QHD – I,… QHD – II,FST… Baryon and Meson Degree of Freedom Bag and Soliton models

Bags and QMC Bag and Soliton models Bag and Soliton models Two Extremes (MIT bag and Skyrme model) Two Extremes (MIT bag and Skyrme model)

Bags and QMC Explicitly include meson degree of freedom --- Quark Meson Coupling (QMC) Model Explicitly include meson degree of freedom --- Quark Meson Coupling (QMC) Model Consists of Non-overlapping Nucleon Bags Bounding by self-consistent Exchange of Meson in MFA Consists of Non-overlapping Nucleon Bags Bounding by self-consistent Exchange of Meson in MFA

Models for Nuclear System QHD models QHD – I,… QHD – II,FST… Baryon and Meson Degree of Freedom Bag and Soliton models MIT Bag (of quarks) QMC Quark and Meson Degree of Freedom Topological Soliton (no quark)

Bags and QMC MIT bag model MIT bag model Nonlinear boundary condition Linear boundary condition

Bags and QMC QMC QMC

Bags and QMC QMC QMC

Bags and QMC QMC QMC

Bags and QMC QMC QMC

Bags and QMC Nucl-th/ QMC QMC

Bags and QMC QMC QMC

Bags and QMC Non-topological soliton model (F-L model) Non-topological soliton model (F-L model) Dynamical confinement/deconfinement mechanism Dynamical confinement/deconfinement mechanism

PRD 41 (1990) 2288, PRD 46 (1992) 3211

Models for Nuclear System QHD models QHD – I,… QHD – II,FST… Bag and Soliton models Non – Topological Soliton QMDTD MIT Bag (of quarks) QMC Topological Soliton

QMDTD

QMDTD Euro. Phys. Lett 56 (2001) 361

QMDTD

QMDTD PRC 65 (2002) , PRC 67 (2003)

QMDTD

QMDTD

QMDTD with mesons Explicitly include meson degree of freedom in QMDTD Explicitly include meson degree of freedom in QMDTD

Models for Nuclear System QHD models QHD – I,… QHD – II,FST… Bag and Soliton models Non – Topological Soliton QMDTD QMDTD + Mesons MIT Bag (of quarks) QMC Topological Soliton

QMDTD with mesons

Numerical Result

K R0R0R0R0 QMC N/A-0.02 QMDTD with mesons

Conclusion A quark model for nuclear matter based on NTS model A quark model for nuclear matter based on NTS model Reproduce the bulk properties of nuclei Reproduce the bulk properties of nuclei Dynamic deconfinement at Tc Dynamic deconfinement at Tc

Thank you!