Speaker
Dr
Hidenori Fukaya
(Osaka University)
Description
Calculation of the eta-prime mass is a notoriously difficult problem, as it requires evaluation of the disconnected diagram which is costly and noisy. In this work, we use a gluonic operator to extract the eta-prime state after smearing the link variables through the Wilson flow. With this choice, one can avoid a large cancellation of pion contribution between the connected and disconnected diagrams. We obtain the eta-prime meson mass on lattices with three different lattice spacings and two physical volumes, which allow us to estimate its continuum and large volume limits.
Primary author
Dr
Hidenori Fukaya
(Osaka University)
Co-authors
Dr
Guido Cossu
(KEK High Energy Accelerator Research Organization)
Prof.
Shoji Hashimoto
(KEK)
Dr
Takashi Kaneko
(KEK)
