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Charmonium resonances from scattering of open charm mesons

Published on:

25 September 2023

Primary Category:

High Energy Physics - Lattice

Paper Authors:

David J. Wilson,

Christopher E. Thomas,

Jozef J. Dudek,

Robert G. Edwards

Bullets

Key Details

Uses lattice QCD to compute meson-meson scattering amplitudes with charmonium quantum numbers

Finds a scalar and tensor resonance strongly coupled to D, D* pairs around 4 GeV

Interprets these as conventional radial excitations of the P-wave chi_c states

Does not find evidence for additional scalar states between chi_c0(1P) and 4 GeV

Shows resonance poles arise in coupled-channel amplitudes where different final states exhibit enhancements

AI generated summary

Charmonium resonances from scattering of open charm mesons

This paper uses lattice QCD calculations to determine the properties of charmonium resonances that couple strongly to pairs of open charm mesons. By computing the discrete energy spectrum in a finite volume, the authors constrain meson-meson scattering amplitudes that exhibit resonant behavior when continued to the complex energy plane. A single scalar and tensor resonance are found around 4 GeV, with large couplings to D and D* meson pairs. No additional scalar states are seen between the ground state and 4 GeV, contrasting some experimental and theoretical works.

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