Thermal dilepton rate and electrical conductivity: An analysis of vector current correlation functions in quenched lattice QCD

Ding H, Francis A, Kaczmarek O, Karsch F, Laermann E, Soeldner W (2011)
Phys.Rev. D 83(3): 34504.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
We calculate the vector current correlation function for light valence quarks in the deconfined phase of QCD. The calculations have been performed in quenched lattice QCD at T=1.45 Tc for four values of the lattice cut-off on lattices up to size 128^3x48. This allows to perform a continuum extrapolation of the correlation function in the Euclidean time interval tau*T -in [0.2, 0.5], which extends to the largest temporal separations possible at finite temperature, to better than 1% accuracy. In this interval, at the value of the temperature investigated, we find that the vector correlation function never deviates from the free correlator for massless quarks by more than 9%. We also determine the first two non-vanishing thermal moments of the vector meson spectral function. The second thermal moment deviates by less than 7% from the free value. With these constraints, we then proceed to extract information on the spectral representation of the vector correlator and discuss resulting consequences for the electrical conductivity and the thermal dilepton rate in the plasma phase.
Stichworte
conductivity; correlation function: vector; approximation: quenching; continuum limit; critical phenomena: deconfinement; current: correlation function; current: vector; dilepton; Lattice; finite temperature; lepton: pair production; moment; time: Euclidean; quantum chromodynamics; plasma; quark: massless; quark: valence; vector meson: spectral representation; Phenomenology-HEP
Erscheinungsjahr
2011
Zeitschriftentitel
Phys.Rev. D
Band
83
Ausgabe
3
Art.-Nr.
34504
ISSN
1550-7998
eISSN
1550-2368
Page URI
https://pub.uni-bielefeld.de/record/1968408

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Ding H, Francis A, Kaczmarek O, Karsch F, Laermann E, Soeldner W. Thermal dilepton rate and electrical conductivity: An analysis of vector current correlation functions in quenched lattice QCD. Phys.Rev. D. 2011;83(3): 34504.
Ding, H., Francis, A., Kaczmarek, O., Karsch, F., Laermann, E., & Soeldner, W. (2011). Thermal dilepton rate and electrical conductivity: An analysis of vector current correlation functions in quenched lattice QCD. Phys.Rev. D, 83(3), 34504. https://doi.org/10.1103/PhysRevD.83.034504
Ding, Hengtong, Francis, Anthony, Kaczmarek, Olaf, Karsch, Frithjof, Laermann, Edwin, and Soeldner, W. 2011. “Thermal dilepton rate and electrical conductivity: An analysis of vector current correlation functions in quenched lattice QCD”. Phys.Rev. D 83 (3): 34504.
Ding, H., Francis, A., Kaczmarek, O., Karsch, F., Laermann, E., and Soeldner, W. (2011). Thermal dilepton rate and electrical conductivity: An analysis of vector current correlation functions in quenched lattice QCD. Phys.Rev. D 83:34504.
Ding, H., et al., 2011. Thermal dilepton rate and electrical conductivity: An analysis of vector current correlation functions in quenched lattice QCD. Phys.Rev. D, 83(3): 34504.
H. Ding, et al., “Thermal dilepton rate and electrical conductivity: An analysis of vector current correlation functions in quenched lattice QCD”, Phys.Rev. D, vol. 83, 2011, : 34504.
Ding, H., Francis, A., Kaczmarek, O., Karsch, F., Laermann, E., Soeldner, W.: Thermal dilepton rate and electrical conductivity: An analysis of vector current correlation functions in quenched lattice QCD. Phys.Rev. D. 83, : 34504 (2011).
Ding, Hengtong, Francis, Anthony, Kaczmarek, Olaf, Karsch, Frithjof, Laermann, Edwin, and Soeldner, W. “Thermal dilepton rate and electrical conductivity: An analysis of vector current correlation functions in quenched lattice QCD”. Phys.Rev. D 83.3 (2011): 34504.
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