Speaker
Nora Brambilla
(TUM)
Description
We show how the Born--Oppenheimer effective field theory (BOEFT) provides
a unified description of ordinary and exotic quarkonia grounded on the
non-relativistic expansions of QCD and supplemented with lattice QCD inputs. We show applications of the BOEFT to tetraquarks, pentaquarks, quarkonium hybrids and to assess threshold effects in the quarkonium spectrum. We present the insights that BOEFT delivers us on the nature of these XYZ exotics states.