26-31 July 2021
Mexico City
Mexico/General timezone
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Mexico City -
Meson Spectroscopy

Decays of an exotic $1^{−+}$ hybrid meson resonance in QCD


  • Dr. Christopher THOMAS

Primary authors


I will discuss a recent calculation where for the first time we determined an exotic $J^{PC} = 1^{-+}$ hybrid meson resonance in lattice QCD. Working with SU(3) flavour symmetry, we found a narrow resonance with a large coupling to at least one axial-vector--psuedoscalar channel. A simple extrapolation to physical light-quark mass suggests a broad $\pi_1$ resonance decaying dominantly through the $b_1 \pi$ mode.

Based on arXiv:2009.10034, for the Hadron Spectrum Collaboration