We present preliminary results towards a fully non-perturbative determination of the equation of state of QCD at very high-temperatures, T≈3−80GeV. The key ingredient is the lattice formulation of QCD in a moving reference frame, which allows us for a neat determination of the entropy density from simple expectation values of the momentum-components of the energy-momentum tensor. For the computation we employ Nf=3 flavours of non-perturbatively O(a)-improved Wilson-fermions. We present an analysis of the O(a)-improvement of the expectation values entering the determination, and show how these can be accurately computed in simulations.
Dalla Brida, M., Giusti, L., Pepe, M. (2019). Towards a precise determination of the equation of state of QCD at high-temperature. In 13th Quark Confinement and the Hadron Spectrum, Confinement 2018 (pp.140-148). Sissa Medialab Srl [10.22323/1.336.0140].
Towards a precise determination of the equation of state of QCD at high-temperature
Dalla Brida, Mattia;Giusti, Leonardo;Pepe, Michele
2019
Abstract
We present preliminary results towards a fully non-perturbative determination of the equation of state of QCD at very high-temperatures, T≈3−80GeV. The key ingredient is the lattice formulation of QCD in a moving reference frame, which allows us for a neat determination of the entropy density from simple expectation values of the momentum-components of the energy-momentum tensor. For the computation we employ Nf=3 flavours of non-perturbatively O(a)-improved Wilson-fermions. We present an analysis of the O(a)-improvement of the expectation values entering the determination, and show how these can be accurately computed in simulations.
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