The QCD phase diagram from analytic continuation

R. Bellwied, S. Borsanyi, Z. Fodor, J. Günther, S. Katz, C. Ratti, K. K. Szabo

Research output: Contribution to journalArticle

83 Citations (Scopus)

Abstract

We present the crossover line between the quark gluon plasma and the hadron gas phases for small real chemical potentials. First we determine the effect of imaginary values of the chemical potential on the transition temperature using lattice QCD simulations. Then we use various formulas to perform an analytic continuation to real values of the baryo-chemical potential. Our data set maintains strangeness neutrality to match the conditions of heavy ion physics. The systematic errors are under control up to μB ≈ 300 MeV. For the curvature of the transition line we find that there is an approximate agreement between values from three different observables: the chiral susceptibility, chiral condensate and strange quark susceptibility. The continuum extrapolation is based on Nt=10, 12 and 16 lattices. By combining the analysis for these three observables we find, for the curvature, the value κ = 0.0149±0.0021.

Original languageEnglish
Pages (from-to)559-564
Number of pages6
JournalPhysics Letters B
Volume751
DOIs
Publication statusPublished - Dec 17 2015

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quantum chromodynamics
phase diagrams
curvature
quarks
magnetic permeability
strangeness
systematic errors
condensates
extrapolation
crossovers
heavy ions
transition temperature
vapor phases
continuums
physics
simulation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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Bellwied, R., Borsanyi, S., Fodor, Z., Günther, J., Katz, S., Ratti, C., & Szabo, K. K. (2015). The QCD phase diagram from analytic continuation. Physics Letters B, 751, 559-564. https://doi.org/10.1016/j.physletb.2015.11.011

The QCD phase diagram from analytic continuation. / Bellwied, R.; Borsanyi, S.; Fodor, Z.; Günther, J.; Katz, S.; Ratti, C.; Szabo, K. K.

In: Physics Letters B, Vol. 751, 17.12.2015, p. 559-564.

Research output: Contribution to journalArticle

Bellwied, R, Borsanyi, S, Fodor, Z, Günther, J, Katz, S, Ratti, C & Szabo, KK 2015, 'The QCD phase diagram from analytic continuation', Physics Letters B, vol. 751, pp. 559-564. https://doi.org/10.1016/j.physletb.2015.11.011
Bellwied, R. ; Borsanyi, S. ; Fodor, Z. ; Günther, J. ; Katz, S. ; Ratti, C. ; Szabo, K. K. / The QCD phase diagram from analytic continuation. In: Physics Letters B. 2015 ; Vol. 751. pp. 559-564.
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