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Title Non-perturbative renormalization of the flavour singlet local vector current with O(a)-improved Wilson fermions
Author(s) 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)
Publication 2022
Number of pages 8
In: PoS LATTICE2021 (2022) 421
In: 38th International Symposium on Lattice Field Theory, Online, 26 - 30 Jul 2021, pp.421
DOI 10.22323/1.396.0421
Subject category Particle Physics - Phenomenology ; Particle Physics - Lattice
Abstract 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. We implement the method in QCD with 3 flavours discretized by the standard Wilson action for gluons and the non-perturbatively O(a)-improved Wilson fermions. By carrying out extensive numerical simulations, the renormalization constant is determined with a permille precision for values of the bare coupling constant in the range 0.52g201.13.
Copyright/License © 2022-2025 The author(s) (License: CC-BY-NC-ND-4.0)

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 Record created 2023-06-09, last modified 2023-06-09


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