Sea-Quark Isospin-Breaking Effects (9/12)

by Mr Alessandro Cotellucci (Humboldt University of Berlin)

Monday 22 Jan 2024, 13:15 → 14:15 Europe/Berlin

1.207 (IRIS)

The quest for sub-percentage precision in hadronic observables requires the inclusion of isospin breaking effects (IBE) in Lattice QCD simulations. The sources of IBE are two: the up and down mass splitting and QED. These two effects have the same order or magnitude, and a consistent evaluation needs to consider both of them. From the practical point of view, there are two ways to include IBE in the simulations: the dynamical generation of QCD+QED configurations and the perturbative expansion of the IBE around isosymmetric QCD (the so-called RM123 method). The latter is widely established in literature but is usually performed in the electro quenched approximation, neglecting contributions from sea quarks. In this talk, I present an attempt to include sea-quark effects focussing on disconnected diagrams.

Isospin_breaking_effects.pdf