Born-Oppenheimer EFT: a unified description of ordinary and exotic quarkonia

Abstract

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 apply BOEFT to tetraquarks, pentaquarks, quarkonium hybrids and to assess threshold effects in the quarkonium spectrum.

Comments: 16 pages, 7 figures, plenary talk at HADRON 2025, Osaka, March 2025 and CHARM 2025, Shanghai, May 2025