May 17 – 22, 2021
US/Eastern timezone

Lattice QCD equation of state at finite chemical potential from an alternative expansion scheme

May 20, 2021, 9:30 AM
Room A (Zoom)

Room A


zoom co-host: Niveditha Ramasubramanian
Theory talk Bulk matter phenomena associated with strange and heavy quarks Bulk (Lattice)


Paolo Parotto (University of Wuppertal)


Taylor expansion of the equation of state of QCD
suffers from shortcomings at chemical potentials $\mu_B \geq (2-2.5)T$.
First, one faces difficulties inherent in performing such an expansion
with a limited number of coefficients; second,
higher order coefficients determined from
lattice calculations suffer from a poor signal-to-noise ratio.
We present a novel scheme for extrapolating
the equation of state of QCD to finite, real chemical
potential that can extend its reach further than previous methods.
We show continuum extrapolated lattice results for the new
expansion coefficients and for the thermodynamic observables up
to $\mu_B/T\le3.5$.

Primary authors

Szabolcs Borsanyi (University of Wuppertal) Zoltan Fodor Jana N. Guenther (University of Wuppertal) Ruben Kara (University of Wuppertal) Sandor Katz (Eotvos University) Paolo Parotto (University of Wuppertal) Attila Pasztor (Eötvös University) Claudia Ratti (University of Houston) Kalman Szabo (Forschungszentrum Jülich GmbH)

Presentation materials