2003/09/24 by R. Frezzotti, Giancarlo Rossi, G. C. Rossi · 5 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat
paper · pdf · doi:10.1016/s0920-5632(03)02741-5
3 pages, based on a talk presented by G.C. Rossi at Lattice 2003, to appear in Nuclear Physics B, Proceedings Supplements
arxiv created 2003/09/24 · openalex publication_date 2004/03/01 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
It is possible to improve the chiral behaviour and the approach to the continuum limit of correlation functions in lattice QCD with standard and twisted Wilson fermions by taking arithmetic averages of correlators computed in theories regularized with Wilson terms of opposite sign. To avoid the problem of the spurious zero-modes of the Wilson--Dirac operator, twisted-mass lattice QCD should be used for the actual computation of the correlators taking part in the averages. A particularly useful choice for the twisting angle is ±π/2 where many physical quantities (e.g. masses and zero-momentum matrix elements) are automatically improved with no need of averaging.