We compute non-perturbatively the renormalization constant of the flavour-singlet local vector current ZV in lattice QCD with 3 massless flavours. Gluons are discretized by the Wilson plaquette action while quarks by the O(a)-improved Wilson–Dirac operator. The constant ZV is fixed by comparing the expectation values (1-point functions) of the conserved and local vector currents at finite temperature in the presence of shifted boundary conditions and at non-zero imaginary chemical potential. Monte Carlo simulations with a moderate computational cost allow us to obtain ZV with an accuracy of about 8‰ for values of the inverse bare coupling constant β=6/g02 in the range 5.3≤β≤11.5.

Bresciani, M., Dalla Brida, M., Giusti, L., Pepe, M., Rapuano, F. (2022). Non-perturbative renormalization of the QCD flavour-singlet local vector current. PHYSICS LETTERS. SECTION B, 835(10 December 2022) [10.1016/j.physletb.2022.137579].

Non-perturbative renormalization of the QCD flavour-singlet local vector current

Bresciani, Matteo;Dalla Brida, Mattia;Giusti, Leonardo;Pepe, Michele
;
Rapuano, Federico
2022

Abstract

We compute non-perturbatively the renormalization constant of the flavour-singlet local vector current ZV in lattice QCD with 3 massless flavours. Gluons are discretized by the Wilson plaquette action while quarks by the O(a)-improved Wilson–Dirac operator. The constant ZV is fixed by comparing the expectation values (1-point functions) of the conserved and local vector currents at finite temperature in the presence of shifted boundary conditions and at non-zero imaginary chemical potential. Monte Carlo simulations with a moderate computational cost allow us to obtain ZV with an accuracy of about 8‰ for values of the inverse bare coupling constant β=6/g02 in the range 5.3≤β≤11.5.
Articolo in rivista - Articolo scientifico
Renormalization; Thermal QCD
English
18-nov-2022
2022
835
10 December 2022
137579
open
Bresciani, M., Dalla Brida, M., Giusti, L., Pepe, M., Rapuano, F. (2022). Non-perturbative renormalization of the QCD flavour-singlet local vector current. PHYSICS LETTERS. SECTION B, 835(10 December 2022) [10.1016/j.physletb.2022.137579].
File in questo prodotto:
File Dimensione Formato  
Besciani-2022-Phys Lett B-VoR.pdf

accesso aperto

Descrizione: Short communication
Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Dimensione 409.66 kB
Formato Adobe PDF
409.66 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/397376
Citazioni
  • Scopus 1
  • ???jsp.display-item.citation.isi??? 0
Social impact