EoS of quark matter and structure of compact stars
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Transcript of EoS of quark matter and structure of compact stars
EoS of quark matter and structure of compact stars
G. X. PengUniversity of Chinese Academy of Sciences
Institute of High Energy Physics (UCAS/IHEP)
Quarks and compact stars , 2014.10.20-22
[email protected], [email protected]
1 、 Introduction2 、 EoS of quark matter
3 、 M-R of compact stars4 、 Summary
EoS of quark matter and structure of compact stars
G.X. Peng @ UCAS/IHEP
Ref.: [1] Xia & Peng et al. Phys. Rev. D 89 (2014) 105027.[2] J.F.Xu, Peng et al. Sci. Chin. Phys. Mech. Astron. 2014.[3] G.X. Peng et al. Phys. Rev. C 77 (2008) 065807.
Quarks and compact stars , 2014.10.20-22
[email protected], [email protected]
Quarks and compact stars
Quarks and compact stars , 2014.10.20-22
[email protected], [email protected]
Modern physics and QCD
Quarks and compact stars , 2014.10.20-22
Asymptotic FreedomQuark ConfinementChiral symmetry
[email protected], [email protected]
Effective masses in physics
RMF:
NJL:
NMB:
Walecka 1995
NPA513:667
QMD:IJMPE06:515
……
Quarks and compact stars , 2014.10.20-22
[email protected], [email protected]
The equivalent mass m(n) - density dependent
Z. Phys. C 9:271
PLB229:112
EPL56 (2001) 361; PRC67:015202
PRC61:015201 62: 025801
PRC72: 015204
Quarks and compact stuars , 2014.10.20-22
ApJ 780: 135
[email protected], [email protected]
Scaling with both confinement & perturbative interaction
Ref: Xia, Peng, et al, PRD89 (Oct. 2014) 100527
Quarks and compact stuars , 2014.10.20-22
“The structure of compact stars with a new quark mass scaling”
---Xia C J, 22 Oct. 2014 @quarks and compact stars
[email protected], [email protected]
Confinement by the density dependence
Quarks and compact stars , 2014.10.20-22
[email protected], [email protected]
Thermodynamics with equivalent masses
ZPC9(1981)271; PLB229(1989)112
PRD51(1995)1989; 52:1276
PRC62(2000)025801; 72(2005)01520477(2008)065807; PRD89(2014)105027
PRC62(2000)15204
PRC77(2008) 055204
3
5
1
4
2
Quarks and compact stars , 2014.10.20-22
[email protected], [email protected]
Necessary condition for thermodynamic consistency
Quarks and compact stars , 2014.10.20-22
[email protected], [email protected]
Necessary condition for thermodynamic consistency
Path-independency
Pressure ballence
Specially , the pressure must be zero at the (free-)energy minimum
Quarks and compact stars , 2014.10.20-22
宇宙的不同层次Perturbatiion model with running coupling, mass, and confnement
Thermodynamic potential at leading orderin the modified minimum-subtraction scheme
Summary
We study the M-R relation of compactstars considering both perturbation confinement interactions. For parameters With which SQM is absolutely stable, the maximum mass of quark stars can be about two time the solar mass.
A poem to the conference
There are compact body in the remote sky.They are fascinlating and so high …Oh, one doesn’t know what they really are,but we can measure the M and R to explore a neutron or quark star.That’s why we are happily here, discussing models and observational data
G.X.Peng, 21 Oct. 2014