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On the emergence of heavy quark spin symmetry breaking in heavy quarkonium decays
V. Baru, E. Epelbaum, A. A. Filin +2
Heavy-quark spin symmetry (HQSS) implies that in the direct decay of a heavy quarkonium with spin , only lower lying heavy quarkonia with the same spin can be produced. Howe…
Do near-threshold molecular states mix with neighbouring states?
Christoph Hanhart, Alexey Nefediev
The last two decades are marked by a renaissance in hadronic spectroscopy caused by the arrival of vast experimental information on exotic states in the spectrum of charmonium and…
Substructure of Multiquark Hadrons (Snowmass 2021 White Paper)
Nora Brambilla, Hua-Xing Chen, Angelo Esposito +27
In recent years there has been a rapidly growing body of experimental evidence for existence of exotic, multiquark hadrons, i.e. mesons which contain additional quarks, beyond the…
A dispersive analysis of and
Simon Holz, Christoph Hanhart, Martin Hoferichter +1
We present a dispersive representation of the transition form factor that allows one to account, in a consistent way, for the effects of - mixing in both the isoscalar a…