2012/11/07 by Krzysztof Cichy, Vincent Drach, Elena García-Ramos +4 · 20 citations
Physics and Astronomy · #Chiral perturbation theory #Diffraction #High-Energy Particle Collisions Research #Lattice QCD #Lattice constant #Lattice field theory #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Quantum mechanics #Quark #Unitarity #Valence (chemistry) #hep-lat
paper · pdf · doi:10.1016/j.nuclphysb.2012.12.011
published in Nuclear Physics B 869(2), 131-163 (Elsevier BV) · 46 pages, 18 figures
arxiv created 2012/11/07 · openalex publication_date 2012/12/22 · arxiv updated 2013/01/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We discuss a Lattice QCD mixed action investigation employing Wilson maximally twisted mass sea and overlap valence fermions. Using four values of the lattice spacing, we demonstrate that the overlap Dirac operator assumes a point-like locality in the continuum limit. We also show that by adopting suitable matching conditions for the sea and valence theories a consistent continuum limit for the pion decay constant and light baryon masses can be obtained. Finally, we confront results for sea-valence mixed meson masses and the valence scalar correlator with corresponding expressions of chiral perturbation theory. This allows us to extract low energy constants of mixed action chiral perturbation which characterize the strength of unitarity violations in our mixed action setup.