Chemical Equilibration and Transport Properties of Hadronic Matter near Tc

J. Noronha-Hostler; J. Noronha; H. Ahmad; I. Shovkovy; C. Greiner

doi:10.1016/j.nuclphysa.2009.10.122

Chemical Equilibration and Transport Properties of Hadronic Matter near T_c

J. Noronha-Hostler, J. Noronha, H. Ahmad, I. Shovkovy, C. Greiner

Research output: Contribution to journal › Article › peer-review

Abstract

We discuss how the inclusion of Hagedorn states near T_c leads to short chemical equilibration times of proton anti-proton pairs, K over(K, -) pairs, and Λ over(Λ, -) pairs, which indicates that hadrons do not need to be "born" into chemical equilibrium in ultrarelativistic heavy ion collisions. We show that the hadron ratios computed within our model match the experimental results at RHIC very well. Furthermore, estimates for η / s near T_c computed within our resonance gas model are comparable to the string theory viscosity bound η / s = 1 / 4 π. Our model provides a good description of the recent lattice results for the trace anomaly close to T_c = 196 MeV.

Original language	English (US)
Pages (from-to)	745c-748c
Journal	Nuclear Physics A
Volume	830
Issue number	1-4
DOIs	https://doi.org/10.1016/j.nuclphysa.2009.10.122
State	Published - Nov 1 2009
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/j.nuclphysa.2009.10.122

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Cite this

@article{9637c74f30594cf6a1b370f94b1a81fa,

title = "Chemical Equilibration and Transport Properties of Hadronic Matter near Tc",

abstract = "We discuss how the inclusion of Hagedorn states near Tc leads to short chemical equilibration times of proton anti-proton pairs, K over(K, -) pairs, and Λ over(Λ, -) pairs, which indicates that hadrons do not need to be {"}born{"} into chemical equilibrium in ultrarelativistic heavy ion collisions. We show that the hadron ratios computed within our model match the experimental results at RHIC very well. Furthermore, estimates for η / s near Tc computed within our resonance gas model are comparable to the string theory viscosity bound η / s = 1 / 4 π. Our model provides a good description of the recent lattice results for the trace anomaly close to Tc = 196 MeV.",

author = "J. Noronha-Hostler and J. Noronha and H. Ahmad and I. Shovkovy and C. Greiner",

note = "Funding Information: J.N. acknowledges support from US-DOE Nuclear Science Grant No. DE-FG02-93ER40764. This work was supported by the Helmholtz International Center for FAIR within the LOEWE program launched by the State of Hesse.",

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TY - JOUR

T1 - Chemical Equilibration and Transport Properties of Hadronic Matter near Tc

AU - Noronha-Hostler, J.

AU - Noronha, J.

AU - Ahmad, H.

AU - Shovkovy, I.

AU - Greiner, C.

N1 - Funding Information: J.N. acknowledges support from US-DOE Nuclear Science Grant No. DE-FG02-93ER40764. This work was supported by the Helmholtz International Center for FAIR within the LOEWE program launched by the State of Hesse.

PY - 2009/11/1

Y1 - 2009/11/1

N2 - We discuss how the inclusion of Hagedorn states near Tc leads to short chemical equilibration times of proton anti-proton pairs, K over(K, -) pairs, and Λ over(Λ, -) pairs, which indicates that hadrons do not need to be "born" into chemical equilibrium in ultrarelativistic heavy ion collisions. We show that the hadron ratios computed within our model match the experimental results at RHIC very well. Furthermore, estimates for η / s near Tc computed within our resonance gas model are comparable to the string theory viscosity bound η / s = 1 / 4 π. Our model provides a good description of the recent lattice results for the trace anomaly close to Tc = 196 MeV.

AB - We discuss how the inclusion of Hagedorn states near Tc leads to short chemical equilibration times of proton anti-proton pairs, K over(K, -) pairs, and Λ over(Λ, -) pairs, which indicates that hadrons do not need to be "born" into chemical equilibrium in ultrarelativistic heavy ion collisions. We show that the hadron ratios computed within our model match the experimental results at RHIC very well. Furthermore, estimates for η / s near Tc computed within our resonance gas model are comparable to the string theory viscosity bound η / s = 1 / 4 π. Our model provides a good description of the recent lattice results for the trace anomaly close to Tc = 196 MeV.

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