Wang, Z.Leinweber, D.B.Liu, C.Liu, L.Sun, P.Thomas, A.W.Wu, J.-J.Xing, H.Yu, K.2025-10-202025-10-202025Journal of High Energy Physics (JHEP), 2025; 2025(8):64-0-64-301126-67081029-8479https://hdl.handle.net/2440/147874We present a lattice QCD investigation of the ρ resonance using nine N(f) = 2 + 1 Wilson-Clover ensembles with three lattice spacings and various pion masses ranging from 135 to 320 MeV. For each ensemble, a large number of finite volume energy levels are determined and the energy dependence of the phase shift obtained from Lüscher’s finite volume method. The mass and width of the ρ resonance are then extracted by assuming the Breit-Wigner form...enOpen Access, © The Authors. Article funded by SCOAP3. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.Effective Field Theories; Hadronic Spectroscopy; Structure and Interactions; Lattice QCDJournal article10.1007/JHEP08(2025)064857989Leinweber, D.B. [0000-0002-4745-6027]Thomas, A.W. [0000-0003-0026-499X]