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Quark confinement and the phase transition in nuclear matter 夸克禁闭与核物质中的相变问题

Quark confinement and the phase transition in nuclear matter 夸克禁闭与核物质中的相变问题. G.X.Peng 彭光雄. GUCAS & IHEP, Chinese Academy of Sciences Div. II of Phys., Math. & Phys. Section, NSFC. Conefinement by Density-dependent quark masses (CDDM) Comparison with the bag mechanism

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Quark confinement and the phase transition in nuclear matter 夸克禁闭与核物质中的相变问题

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  1. Quark confinement and the phase transition in nuclear matter夸克禁闭与核物质中的相变问题 G.X.Peng彭光雄 GUCAS &IHEP, Chinese Academy of Sciences Div. II of Phys., Math. & Phys. Section, NSFC Conefinement by Density-dependent quark masses (CDDM) Comparison with the bag mechanism 3. Phase diagram & chiral restoration Ref: PRC 77 (2008) 065807; NPA 747 (2005) 75

  2. 核物质中的相变类型 1.退禁闭相变 2.手征恢复相变 3.液-汽相变 . ……

  3. 核物质中的相变类型?

  4. 退禁闭相变 nm qm

  5. 手征相变

  6. Quark confinement mechanism MIT bag CDDM

  7. Drawback of bag model (I) Sound velosity not zero for massless quarks at very low density

  8. Drawback of bag model (II): EoS always concave

  9. Confinement by density-dependent quark masses CDDM

  10. History 1. Fowler, Raha, Weiner suggested Z. Phys. C 9 (1981) 271 2. Chakrabarty, Raha, Sinha extended it to include strange quarks Phys. Lett. B 229 (1989) 112 Phys. Rev. D 43 (1991) 627; 48 (1993) 1409 3. Zhang and Su et. al. extended it to include temperature Europhys. Lett. 56 (2001) 361; Phys. Rev. C 67 (2003) 015202.

  11. Main weakpoints of the previous treatment • The quark mass scaling is not derived • The vacuum limits are incorrect • There are thermodynamic problems PRD 51 (1995) 1989, PRD 52 (1995) 1276

  12. Confinement by density-dependent quark masses

  13. Quark mass scaling

  14. Quark mass scaling Z=1/3, T=150—170 MeV

  15. Thermodynamic consistency Peng et al, PRC 77 (2008) 065807

  16. Schematic comparison (I)

  17. Schematic comparison (II)

  18. Mixed phase in the intermediate density

  19. Critical densities for given proton fractions

  20. Chiral condensates in medium

  21. Chiral condensates in medium

  22. Chiral condensates in medium

  23. Chiral condensates in medium

  24. Chiral condensates in medium L.Chang et al, PRD 72(‘05)094023

  25. Summary We have discussed the phase transition in nuclear physics, concentrating on the deconfinement phase transition and chiral restoration phase transition. It is suggested that the confinement interaction plays a major role in the chiral restoration.

  26. Thanks

  27. 再见

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