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Progresses on high-temperature QCD: Equation of State and energy-momentum tensor
/ Bresciani, Matteo (Milan Bicocca U. ; INFN, Milan) ; Dalla Brida, Mattia (CERN) ; Giusti, Leonardo (Milan Bicocca U.) ; Pepe, Michele (INFN, Milan)
We present first non-perturbative results for the renormalization constants of the QCD energy-momentum tensor, based on the framework of thermal QCD with shifted and twisted (for quarks only) boundary conditions in the compact direction. We also show preliminary results for the entropy density obtained with the very same numerical strategy. [...]
arXiv:2312.11009.-
2023-12-27 - 8 p.
- Published in : PoS LATTICE2023 (2024) 192
Fulltext: 2312.11009 - PDF; document - PDF;
In : 40th International Symposium on Lattice Field Theory (Lattice 2023), Fermilab, Batavia, IL, United States, 30 Jul - 5 Aug 2023, pp.192
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Non-perturbative renormalization of the flavour singlet local vector current with O($a$)-improved Wilson fermions
/ Bresciani, Matteo (Milan Bicocca U. ; INFN, Milan Bicocca) ; Dalla Brida, Mattia (CERN) ; Giusti, Leonardo (Milan Bicocca U. ; INFN, Milan Bicocca) ; Pepe, Michele (INFN, Milan Bicocca) ; Rapuano, Federico (Milan Bicocca U. ; INFN, Milan Bicocca)
We determine non-perturbatively the renormalization constant of the flavour singlet
local vector current with O($a$)-improved Wilson fermions. The renormalization constant is fixed by comparing the expectation values (one-point function) of the local vector current and of the conserved one in thermal QCD in a moving reference frame with a non-zero
imaginary chemical potential and in the chiral limit. [...]
2022 - 8 p.
- Published in : PoS LATTICE2021 (2022) 421
Fulltext: PDF;
In : 38th International Symposium on Lattice Field Theory, Online, 26 - 30 Jul 2021, pp.421
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3.
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QCD mesonic screening masses up to high temperatures
/ Dalla Brida, Mattia (CERN) ; Giusti, Leonardo (Milan Bicocca U. ; INFN, Milan Bicocca) ; Harris, Tim (Edinburgh U.) ; Laudicina, Davide (Milan Bicocca U. ; INFN, Milan Bicocca) ; Pepe, Michele (INFN, Milan Bicocca)
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. [...]
arXiv:2211.11549; CERN-TH-2022-198.-
2022-12-12 - 6 p.
- Published in : PoS: ICHEP2022 (2022) , pp. 829
Fulltext: 2211.11549 - PDF; document - PDF;
In : 41st International Conference on High Energy Physics (ICHEP 2022), Bologna, Italy, 6 - 13 Jul 2022, pp.829
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4.
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Thermal QCD for non-perturbative renormalization of composite operators
/ Bresciani, Matteo (INFN, Milan Bicocca ; Milan Bicocca U.) ; Dalla Brida, Mattia (CERN) ; Giusti, Leonardo (INFN, Milan Bicocca ; Milan Bicocca U.) ; Pepe, Michele (INFN, Milan Bicocca)
We present our progresses in the use of the non-perturbative renormalization framework based on considering QCD at finite temperature with shifted and twisted (for quarks only) boundary conditions in the compact direction. We report our final results in the application of this method for the non-perturbative renormalization of the flavor-singlet local vector current. [...]
arXiv:2211.13641; CERN-TH-2022-184.-
2023-01-29 - 9 p.
- Published in : PoS: LATTICE2022 (2023) , pp. 364
Fulltext: document - PDF; 2211.13641 - PDF;
In : 39th International Symposium on Lattice Field Theory (Lattice 2022), Bonn, Germany, 8 - 13 Aug 2022, pp.364
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5.
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QCD mesonic screening masses and restoration of chiral symmetry at high T
/ Laudicina, Davide (Milan Bicocca U. ; INFN, Milan Bicocca) ; Dalla Brida, Mattia (CERN) ; Giusti, Leonardo (Milan Bicocca U. ; INFN, Milan Bicocca) ; Harris, Tim (Edinburgh U.) ; Pepe, Michele (INFN, Milan Bicocca)
We present a strategy to study QCD non-perturbatively on the lattice at very high temperatures. This strategy exploits a non-perturbative, finite-volume, definition of the strong coupling constant to renormalize the theory. [...]
arXiv:2212.02167; CERN-TH-2022-201.-
2022-12-07 - 9 p.
- Published in : PoS: LATTICE2022 (2023) , pp. 182
- Published in : PoS
Fulltext: document - PDF; 2212.02167 - PDF;
In : 39th International Symposium on Lattice Field Theory (Lattice 2022), Bonn, Germany, 8 - 13 Aug 2022, pp.182
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Computation of QCD meson screening masses at high temperature
/ Laudicina, Davide (Milan Bicocca U. ; INFN, Milan Bicocca) ; Dalla Brida, Mattia (CERN) ; Giusti, Leonardo (Milan Bicocca U. ; INFN, Milan Bicocca) ; Harris, Tim (Edinburgh U.) ; Pepe, Michele (INFN, Milan Bicocca)
We compute flavor non-singlet meson screening masses in the chiral limit of QCD with $N_f=3$ quarks. The calculation is carried out at 12 temperatures from $T\approx 1$ GeV up to the electroweak scale. [...]
arXiv:2112.06662; CERN-TH-2021-206.-
2022-05-16 - 8 p.
- Published in : PoS LATTICE2021 (2022) 190
Fulltext: 2112.06662 - PDF; document - PDF;
In : 38th International Symposium on Lattice Field Theory, Online, 26 - 30 Jul 2021, pp.190
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9.
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Multi-level computation of the hadronic vacuum polarization contribution to $(g_\mu-2)$
/ Giusti, Leonardo (Milan Bicocca U. ; INFN, Milan Bicocca) ; Brida, Mattia Dalla (CERN) ; Harris, Tim (Edinburgh U.) ; Pepe, Michele (INFN, Milan Bicocca)
The first results from the Fermilab E989 experiment have confirmed the long-standing tension between the experimental determination of the muon anomalous magnetic moment $a_\mu=(g_\mu-2)/2$ and its SM determination using the dispersive approach. In order to match the expected final precision from E989, the current uncertainty on ab initio determinations using lattice QCD must be decreased by a factor 5-15, a goal which is hampered by the signal-to-noise ratio problem of the electromagnetic current correlator. [...]
arXiv:2112.02647; CERN-TH-2021-203.-
2022-05-16 - 8 p.
- Published in : PoS LATTICE2021 (2022) 356
Fulltext: document - PDF; 2112.02647 - PDF;
In : 38th International Symposium on Lattice Field Theory, Online, 26 - 30 Jul 2021, pp.356
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