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T: Fachverband Teilchenphysik

T 13: Theorie: QFT / Gittereichtheorie

T 13.3: Vortrag

Montag, 19. März 2018, 16:30–16:45, Z6 - SR 1.013

Elements of non-perturbative quark mass renormalization in three-flavour lattice QCD — Jochen Heitger¹, •Fabian Joswig¹, Simon Kuberski¹, and Anastassios Vladikas² — ¹Westfälische Wilhelms-Universität Münster, Institut für Theoretische Physik, Wilhelm-Klemm-Straße 9, 48149 Münster, Germany — ²INFN, Sezione di Tor Vergata, c/o Dipartimento di Fisica, Università di Roma Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy

We report on advances in the determination of the ratio Z_S/Z_P of the scalar to the pseudoscalar renormalization constants in three-flavour lattice QCD with Wilson-clover quarks and tree-level Symanzik improved gluons. The computations are based on the Ward identity approach, using Schrödinger functional boundary conditions. Our results for Z_S/Z_P cover a range of couplings along a line of constant physics with lattice spacings of about 0.09 fm and below, relevant for phenomenological applications such as the non-perturbative renormalization of quark masses. We also outline a strategy to determine the charm quark’s mass from N_f=2+1 lattice QCD.