Identifying spin and parity of charmonia in flight with lattice QCD

Understand

The spectrum of charmonium resonances contains a number of unanticipated states along with several conventional quark-model excitations.

• The hadrons of different quantum numbers $J^P$ appear in a fairly narrow energy band, where $J^P$ refers to the spin-parity of a hadron at rest.
• This poses a challenge for Lattice QCD studies of (coupled-channel) meson-meson scattering aimed at the determination of scattering amplitudes and resonance pole positions.
• A wealth of information for this purpose can be obtained from the lattice spectra in frames with nonzero total momentum.