We discuss a strategy to study non-perturbatively QCD up to very high temperatures by Monte Carlo simulations on the lattice. It allows not only the thermodynamic properties of the theory but also other interesting thermal features to be investigated. As a first concrete application, we compute the flavour non-singlet mesonic screening masses and we present the results of Monte Carlo simulations at 12 temperatures covering the range from T ∼ 1 GeV up to ∼ 160 GeV in the theory with three massless quarks. On the one side, chiral symmetry restoration manifests itself in our results through the degeneracy of the vector and the axial vector channels and of the scalar and the pseudoscalar ones, and, on the other side, we observe a clear splitting between the vector and the pseudoscalar screening masses up to the highest investigated temperature. A comparison with the high-temperature effective theory shows that the known one-loop order in the perturbative expansion does not provide a satisfactory description of the non-perturbative data up to the highest temperature considered.

Dalla Brida, M., Giusti, L., Harris, T., Laudicina, D., Pepe, M. (2023). QCD mesonic screening masses up to high temperatures. In 41st International Conference on High Energy Physics, ICHEP 2022. Sissa Medialab Srl [10.22323/1.414.0829].

QCD mesonic screening masses up to high temperatures

Dalla Brida, M;Giusti, L;Harris, T;Laudicina, D;Pepe, M
2023

Abstract

We discuss a strategy to study non-perturbatively QCD up to very high temperatures by Monte Carlo simulations on the lattice. It allows not only the thermodynamic properties of the theory but also other interesting thermal features to be investigated. As a first concrete application, we compute the flavour non-singlet mesonic screening masses and we present the results of Monte Carlo simulations at 12 temperatures covering the range from T ∼ 1 GeV up to ∼ 160 GeV in the theory with three massless quarks. On the one side, chiral symmetry restoration manifests itself in our results through the degeneracy of the vector and the axial vector channels and of the scalar and the pseudoscalar ones, and, on the other side, we observe a clear splitting between the vector and the pseudoscalar screening masses up to the highest investigated temperature. A comparison with the high-temperature effective theory shows that the known one-loop order in the perturbative expansion does not provide a satisfactory description of the non-perturbative data up to the highest temperature considered.
abstract + slide
Lattice QCD
English
41st International Conference on High Energy Physics, ICHEP 2022 - 6 July 2022 through 13 July 2022
2022
41st International Conference on High Energy Physics, ICHEP 2022
2023
414
829
open
Dalla Brida, M., Giusti, L., Harris, T., Laudicina, D., Pepe, M. (2023). QCD mesonic screening masses up to high temperatures. In 41st International Conference on High Energy Physics, ICHEP 2022. Sissa Medialab Srl [10.22323/1.414.0829].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/444580
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