Radiative improvement of the lattice NRQCD action using the background field method and application to the hyperfine splitting of quarkonium states
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/ Abstract
T. C. Hammant,1 A. G. Hart,2, 3 G. M. von Hippel,4 R. R. Horgan,1 and C. J. Monahan1 1Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Centre for Mathematical Sciences, Cambridge CB3 0WA, United Kingdom 2Cray Exascale Research Initiative Europe, JCMB, King’s Buildings, Edinburgh EH9 3JZ, United Kingdom 3SUPA, School of Physics and Astronomy, University of Edinburgh, King’s Buildings, Edinburgh EH9 3JZ, United Kingdom 4Institut für Kernphysik, University of Mainz, Becher-Weg 45, 55099 Mainz, Germany