2021/12/01 by Pia Leonie Jones Petrak, Petrak, Pia Leonie Jones, Gunnar Bali +11
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2112.00586
openalex publication_date 2021/12/01 · openalex created_date 2022/11/09 · openalex updated_date 2026/07/28
A lot of progress has been made in the determination of nucleon sigma terms.\nIn this work we consider the sigma terms of the other octet baryons as well.\nThese are determined on CLS gauge field ensembles employing the L "uscher-Weisz\ngluon action and the Sheikholeslami-Wohlert fermion action with N_\f =\n2 + 1. The ensembles have pion masses ranging from 410 ,\MeV down\nto the physical value and lattice spacings covering a range between\n0.09 ,\fm and 0.04 ,\fm. We present some preliminary\nresults for a\≈ 0.06 fm along a trajectory where the sum of the sea\nquark masses is kept constant, focusing on the quark mass dependence. We\ndiscuss multi-state fits to tackle the well-known problem of excited state\ncontamination and detail how we analyse connected and disconnected\ncontributions.\n