Münster 2017 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 84: Gittereichtheorie

T 84.8: Vortrag

Mittwoch, 29. März 2017, 18:30–18:45, VSH 11

η and η^′ masses and decay constants from lattice QCD — •Jakob Simeth, Gunnar Bali, and Sara Collins — Universität Regensburg, D-93040 Regensburg

We present preliminary results for the masses and decay constants of the η and η^′ mesons from ab initio lattice QCD simulations.

The analysis is performed using the CLS N_f = 2+1 ensembles, which cover a wide range of quark masses, lattice spacings and volumes and approach the physical point along two trajectories, one keeping the trace of the quark masses fixed and the other at constant strange quark mass.

One of the major challenges in these calculations are the large statistical fluctuations due to disconnected quark loops. We tackle these by employing a combination of noise reduction techniques which are tuned to achieve the optimal noise reduction per cost.