Speaker
David Wilson
(University of Cambridge)
Description
An exotic hybrid meson resonance appearing in $J^{PC}=1^{-+}$ is determined for the first time from lattice QCD. Many finite volume energy levels are computed and used with the coupled-channel extension of the Lüscher formalism to determine the scattering amplitudes in the limit where SU(3) flavour symmetry is exact. The scattering amplitude contains a pole that has a large coupling to an axial-vector-pseudoscalar channel, suggestive of a broad $\pi_1$ resonance with a dominant $b_1\pi$ decay mode.
Based on A. J. Woss et al (for the Hadron Spectrum Collaboration),
PRD 103 (2021) 5, 054502, arXiv: 2009.10034.
Author
David Wilson
(University of Cambridge)
