Lattice QCD Equation of State at Finite Chemical Potential from an Alternative Expansion Scheme

S. Borsányi, Z. Fodor, J. N. Guenther, R. Kara, S. D. Katz, P. Parotto, A. Pásztor, C. Ratti, K. K. Szabó

Research output: Contribution to journalArticlepeer-review

68 Scopus citations

Abstract

In this Letter, we introduce a novel scheme for extrapolating the equation of state of QCD to finite chemical potential that features considerably improved convergence properties and allows us to extend its reach to unprecedentedly high baryonic chemical potentials. We present continuum extrapolated lattice results for the new expansion coefficients and show the thermodynamic observables up to μB/T≤3.5. This novel expansion does not suffer from the shortcomings that characterize the traditional Taylor expansion method, such as difficulties inherent in performing such an expansion with a limited number of coefficients and the poor signal-to-noise ratio that affects Taylor coefficients determined from lattice calculations.

Original languageEnglish (US)
Article number232001
JournalPhysical review letters
Volume126
Issue number23
DOIs
StatePublished - Jun 11 2021

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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