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Hagedorn states and Thermalization PowerPoint Presentation

Hagedorn states and Thermalization

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Hagedorn states and Thermalization

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DM2010, High Density Nuclear Matter, Stellenbosch, South Africa

Hagedorn states andThermalization(courtesy

L. Ferroni)

Hadronization Africa

at the phase boundary…?

Hadronization Africa –

molecular dynamical simulation

C. Traxler et al., PRC59 1620 (1999)

… Hagedorn spectrum

Hadron Resonance Gas with AfricaHagedorn States and comparison to lattice QCD close to

J. Noronha-Hostler, J. Noronha, CG arXiv:0909.2908

- Hagedorn spectrum:

- RBC collaboration:

The order and shape of QGP phase transition Africa

I.Zakout, CG and J. Schaffner-Bielich, NPA 781 (2007) 150,

PRC78:034916 and arXiv: 1002.3119

density of states:

Crossover transition in bag-like models Africa

L. Ferroni and V. Koch, PRC79 (2009) 034905

density of states:

Strangeness production at SpS energies Africa

Production of Antihyperons:

QGP signature…?

J. Geiss

P. Koch, B. Müller, J. Rafelski

Production of AfricaAnti-Baryons

Multimesonic channels

R.Rapp and E. Shuryak,

Phys.Rev.Lett.86(2001) 2980

C.Greiner and S.Leupold, J.Phys. G27(2001) L95

SPS

But

But:

Chemical Freeze-out and of QCD Africa

(P. Braun-Munzinger, J. Stachel, C. Wetterich,Phys.Lett.B596:61-69 (2004))

Chemical equilibration

of baryon / anti-baryons:

Hadronic resonance gas

vs. lattice:

Multimesonic channels:

Possible solution by AfricaHagedorn states

C. Greiner, P. Koch, F. Liu,

I. Shovkovy, H. Stöcker

J.Phys.G31 (2005)

Estimate for Africabaryon/antibaryon production

(Micro)canonical decay of AfricaHagedorn States

(Fuming Liu)

J. Noronha-Hostler Africa, CG, I. Shovkovy,

PRL 100:252301, 2008; and arXiv:0909.2908

Rate Equations

Decay Widths Africa

Linear fit (PDG)

for

Baryon anti-baryon decay ((micro)canonical)

the average proton number is

Analogously for Kaons, Lambdas and Omegas (!)

Expanding fireball Africa

Varying parameters has only small effect!

protons Africa

Varying parameters has only small effect!

kaons Africa

Lambdas Africa

Omegas Africa

M.Beitel

The Africastrange sector of baryons/antibaryons

Importance of AfricabaryonicHS ?

Summary Africa

Potential Hagedorn States close to critical temperature:

- can explain fast chemical equilibration by HS regeneration
- roughly:
- roughly:
- smaller shear viscosity of QCD matter at
- Future: embedding into UrQMD

J. Noronha-Hostler, M. Beitel, CG,

I.Shovkovy arXiv:0909.2908, PRC in press

Particle Ratios as a Probe of the QCD Critical Temperature Africa

J. Noronha-Hostler, H. Ahmad,

J. Noronha, CG, arXiv:0906.3960

Hagedorn States provide a unique method to compare lattice results for Tc using thermal fits

Hagedorn states provide a lower chi^2 than thermal fits without Hagedorn states

Transport Coefficients of Hadronic Matter near Africa

J. Noronha-Hostler, J. Noronha, CG,

PRL103:172302 (2009)

While both η (due to the small MFP of HS) and s increase with increasing T, the entropy increases quicker close to Tc, which decreases η/s.

HRG

of a hadron gas including HS matches well with the lattice at

HS

Three-particle Africa interactions through parton rearrangement

UrQMD+ Recombination, Baryonfusion, Quark annihilation

[H.Petersen et al. , arXiv:0805.0567v1 (2008)]

[G.Gräf, diploma thesis, Frankfurt (2009)]

Same mechanism previously implemented in QGSM

[Bleibel , Burau et al. , arXiv: nucl-th/0610021 (2007)]

[Bleibel , Burau et al. , arXiv: 0711.3366 (2008)]

Recombination

Lambda multiplicity

Elliptic flow excitation function

Baryonfusion

Quark annihilation

- preliminary -

production at RHIC Africa

Thermal rates within

chiral SU(3) description

Chemical population of

baryons / anti-baryons:

I. Shovkovy, J. Kapusta (2003)

P. Huovinen, J. Kapusta (2004)

Insufficient by a factor of 3 to 4