Thomas KlähnD. BlaschkeR. ŁastowieckiF. Sandin
20.5.2011Thomas Klähn – Three Days on Quarkyonic Island
COMPACT STARS, HEAVY ION COLLISIONS AND LESSONS FOR QCD
Thomas Klähn – Three Days on Quarkyonic Island
CONCLUSION20.5.2011
of the “CompStar School and Workshop” (Catania - May 3-12, 2011)
The most exciting news of the last year:
• Mass of Pulsar J1614-2230 : Demorest et al., Nature 467, 1081-1083 (2010)• Rapid cooling of Cas A Heinke, Ho, Astrophys. J. Lett., 719, L167 (2010)
sunM)04.097.1(M
Page, Prakash, Lattimer, Steiner, Phys.Rev.Lett.106:081101 (2011)Blaschke, Grigorian, Prog.Part.Nucl.Phys. 59 (2007)
Thomas Klähn – Three Days on Quarkyonic Island
CONCLUSION20.5.2011
of the “CompStar School and Workshop” (Catania - May 3-12, 2011)
The most exciting news of the last year are:
• Mass of Pulsar J1614-2230 : P.Demorest et al., Nature 467, 1081-1083 (2010)
What are the consequences for the existence of quark matter in Compact Stars?
sunM)04.097.1(M
Thomas Klähn – Three Days on Quarkyonic Island
PSR J1614-223020.5.2011
Binary system in Scorpius ہparsecs from Earth 1200 ہNeutron star with white dwarf companion ہNS - millisecond pulsar (P=3.15 ms) ہ
.Time signal is getting delayed when passing near massive object ہ.General relativistic effect ہ.Size of the effect depends on the mass and inclination angle ہPulse delay best to measure when pulsar is exactly behind companion ہ
Thomas Klähn – Three Days on Quarkyonic Island
PSR J1614-223020.5.2011
Binary system in Scorpius ہparsecs from Earth 1200 ہNeutron star with white dwarf companion ہNS - millisecond pulsar (P=3.15 ms) ہRecycled pulsar – accretion ہ
.Time signal is getting delayed when passing near massive object ہ.General relativistic effect ہ.Size of the effect depends on mass and inclination angle ہPulse delay best to measure when pulsar is exactly behind companion ہ
Thomas Klähn – Three Days on Quarkyonic Island
PSR J1614-223020.5.2011
Observational Results:
inclination angle 89.17 ہ
.companion mass of 0.5 solar masses ہcompanion is a helium-carbon-oxygen white dwarf ہ
Thomas Klähn – Three Days on Quarkyonic Island
PSR J1614-223020.5.2011
Observational Results:
inclination angle 89.17 ہ
.companion mass of 0.5 solar masses ہcompanion is a helium-carbon-oxygen white dwarf ہ
:neutron star mass ہ
WORLD (universal? intergalactic?) RECORD! P.Demorest et al., Nature 467, 1081-1083 (2010)
:Highest well known mass of NS before ہ
sunM)04.097.1(M
sunM66.1
Thomas Klähn – Three Days on Quarkyonic Island
20.5.2011
Nuclear matter far beyond saturation density is not well understood:
Klähn et al., Phys.Rev. C74 (2006) 035802
WHY PSR J1614 IS SO EXCITING
Thomas Klähn – Three Days on Quarkyonic Island
WHY PSR J1614 IS SO EXCITING20.5.2011
Large neutron star masses (about and more) provide a serious constraint.Sun2MKlähn et al., Phys.Rev. C74 (2006) 035802
Thomas Klähn – Three Days on Quarkyonic Island
WHY PSR J1614 IS SO EXCITING20.5.2011
Klähn et al., Phys.Rev. C74 (2006) 035802
Thomas Klähn – Three Days on Quarkyonic Island
WHY PSR J1614 IS SO EXCITING20.5.2011
Thomas Klähn – Three Days on Quarkyonic Island
WHY PSR J1614 IS SO EXCITING20.5.2011
Thomas Klähn – Three Days on Quarkyonic Island
WHY PSR J1614 IS SO EXCITING20.5.2011
INTERESTING!!!
If UB confirmed unambiguously...
HIC can constrain maximum NS mass!
... which we estimated quite a time ago:
sunmax M1.20.2M Klähn et al., Phys.Rev. C74 (2006) 035802
Thomas Klähn – Three Days on Quarkyonic Island
PSR J1614 AND QUARK MATTER20.5.2011
Can QM be present in PSR J1614?Presently, one cannot knowwhether quark matter exists in PSR J1614.
However, if there is NOquark matter in this object,it is in no other NS we know.
Why is this so?The more massive a NS isthe higher is the central density.
Would clarifying the question of QM in NSaffect experiments which explore the QCD phase transition?It certainly would! And more thanthis… we would LEARN a lot!
Thomas Klähn – Three Days on Quarkyonic Island
WHY PSR J1614 IS SO EXCITING20.5.2011
Thomas Klähn – Three Days on Quarkyonic Island
WHY PSR J1614 IS SO EXCITING20.5.2011
NOT HEAVY ENOUGH
Thomas Klähn – Three Days on Quarkyonic Island
WHY PSR J1614 IS SO EXCITING20.5.2011
NOT HEAVY ENOUGH
TROUBLEWITH FLOW
Thomas Klähn – Three Days on Quarkyonic Island
WHY PSR J1614 IS SO EXCITING20.5.2011
NOT HEAVY ENOUGH
TROUBLEWITH FLOW
Purely nuclear EoS
Thomas Klähn – Three Days on Quarkyonic Island
WHY PSR J1614 IS SO EXCITING20.5.2011
One of the big unknowns when describingquark matter in NSs is the nuclear equation of state.Favorable: Nucleons (…, diquarks, mesons) as quark correlations
Thomas Klähn – Three Days on Quarkyonic Island
WHY PSR J1614 IS SO EXCITING20.5.2011
HADRONS AS QUARK BOUNDSTATES
Problem is attacked in vacuum Faddeev Equations
Baryons as composites of confined quarks and diquarks q-propagator, d-propagator, Bethe-Salpeter-Ampl., Faddeev Ampl.
Γ Ψ
Cloet et al. (2008)Current quark mass dependence of nucleon magnetic moments and radii
Eichmann et al. (2008)The nucleon as a QCD bound state in a Faddeev approach.
Bethe Salpeter EquationsP. Maris (2002)Effective masses of diquarks.
Bhagwat et al. (2007)Flavour symmetry breaking and meson masses
Thomas Klähn – Three Days on Quarkyonic Island
WHY PSR J1614 IS SO EXCITING20.5.2011
HADRONS AS QUARK BOUNDSTATES
Problem is attacked in vacuum Faddeev Equations
Baryons as composites of confined quarks and diquarks q-propagator, d-propagator, Bethe-Salpeter-Ampl., Faddeev Ampl.
Γ Ψ
Cloet et al. (2008)Current quark mass dependence of nucleon magnetic moments and radii
Eichmann et al. (2008)The nucleon as a QCD bound state in a Faddeev approach.
Bethe Salpeter EquationsP. Maris (2002)Effective masses of diquarks.
Bhagwat et al. (2007)Flavour symmetry breaking and meson masses
But barely explored in medium
Thomas Klähn – Three Days on Quarkyonic Island
WHY PSR J1614 IS SO EXCITING20.5.2011
One of the big unknowns when describing quark matter in NSsis the nuclear equation of state.Favorable: Nucleons (… and diquarks … and mesons!!!) as quark correlations
In medium… this is a challenge we have to face now and in the future.
Work around: model nuclear and free quark matter EoS independently construct a phase transition
A phase transition softens the equation of state!
Thomas Klähn – Three Days on Quarkyonic Island
ADJUSTING THE QUARK MATTER EOS20.5.2011
Thomas Klähn – Three Days on Quarkyonic Island
One of the big unknowns when describing quark matter in NSsis the nuclear equation of state.Favorable: Nucleons (… and diquarks … and mesons!!!) as quark correlations
In medium… this is a challenge we have to face now and in the future.
Work around: model nuclear and quark matter independently construct a phase transition
A phase transition softens the equation of state! VERY GOOD!!! Solves some problems.
ADJUSTING THE QUARK MATTER EOS20.5.2011
Thomas Klähn – Three Days on Quarkyonic Island
One of the big unknowns when describing quark matter in NSsis the nuclear equation of state.Favorable: Nucleons (… and diquarks … and mesons!!!) as quark correlations
In medium… this is a challenge we have to face now and in the future.
Work around: model nuclear and quark matter independently construct a phase transition
A phase transition softens the equation of state! VERY GOOD!!! Solves some problems.
ADJUSTING THE QUARK MATTER EOS20.5.2011
Doesn’t look very systematic
Thomas Klähn – Three Days on Quarkyonic Island
ADJUSTING THE QUARK MATTER EOS20.5.2011
Thomas Klähn – Three Days on Quarkyonic Island
ADJUSTING THE QUARK MATTER EOS20.5.2011
no stable hybridsPT at too large n
Thomas Klähn – Three Days on Quarkyonic Island
ADJUSTING THE QUARK MATTER EOS20.5.2011
no stable hybridsPT at too large n
Quark Stars?PT at too small n
Thomas Klähn – Three Days on Quarkyonic Island
ADJUSTING THE QUARK MATTER EOS20.5.2011
no stable hybridsPT at too large n
Quark Stars?PT at too small n
PSR J1614
sunmax M)04.097.1(M
Thomas Klähn – Three Days on Quarkyonic Island
ADJUSTING THE QUARK MATTER EOS20.5.2011
no stable hybridsPT at too large n
Quark Stars?PT at too small n
PSR J1614
sunmax M)04.097.1(M M
max increases
Thomas Klähn – Three Days on Quarkyonic Island
ADJUSTING THE QUARK MATTER EOS20.5.2011
no stable hybridsPT at too large n
Quark Stars?PT at too small n
PSR J1614
sunmax M)04.097.1(M M
max increases
Thomas Klähn – Three Days on Quarkyonic Island
ADJUSTING THE QUARK MATTER EOS20.5.2011
no stable hybridsPT at too large n
Quark Stars?PT at too small n
PSR J1614
sunmax M)04.097.1(M M
max increases
Massive Quark Cores are HERE
Thomas Klähn – Three Days on Quarkyonic Island
ADJUSTING THE QUARK MATTER EOS20.5.2011
no stable hybridsPT at too large n
Quark Stars?PT at too small n
PSR J1614
Comparison with sym. matter:
QM in PSR J1614?Yes -> No -> It is remarkable thatthis critical value israther constant!Still: For this model…
sunmax M)04.097.1(M Mm
ax increases
symonsetn
satsymonset 4nn
satsymonset 4nn
Massive Quark Cores are HERE
Thomas Klähn – Three Days on Quarkyonic Island
CONCLUSIONS20.5.2011
• Compact Stars provide increasingly severe constraints on the cold EoS• In combination with HIC data it might soon be possible to pin the EoS• Attack EoS already now from both sides and point out model inconsistencies Example here: PSR J1614 vs Flow = EoS neither too soft nor too stiff
• Quark matter in compact stars is NOT ruled out by large masses
• Transport properties and all aspects of temporal evolution will be important
• Consistent approaches are required (A.Sedrakian!)
• We expect an increase of NS data by an order of magnitude
Good times ahead!