Preprint
Aug 2026
Quarkoniumlike states above open-flavor thresholds in Born-Oppenheimer EFT
Many quarkoniumlike states have been observed above open-flavor thresholds, but their organization and internal structure remain unsettled. We study the isoscalar hidden-charm and hidden-bottom sectors in Born--Oppenheimer effective field theory (BOEFT), between the spin--isospin averaged $S+S$ and $S+P$ thresholds. At...
Nora Brambilla, Roberto Bruschini, Abhishek Mohapatra et al.
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