DOE OSTI · 3484474
Coupled-channel approach to isotensor π π π scattering from lattice QCD
Abstract
The quest to understand three-body dynamics from first-principle QCD includes the study of nonresonant and resonant systems. The isospin I = 2 system is of particular interest having no three-body resonance but featuring a resonance in a subchannel, while also being a coupled-channel problem. In this study, we calculate the finite-volume spectrum from lattice QCD at two different pion masses, map the amplitude to the infinite volume through a generalized Finite-Volume Unitarity three-body quantization condition, investigate the limit of a narrow ρ , and compare with an effective Lagrangian prediction at leading order. Chiral extrapolations between different pion masses are performed.
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Feng, Yuchuan [The George Washington University] (ORCID:0009000110956829), Culver, Chris [Groq Inc] (ORCID:000900087614156X), Döring, Michael [The George Washington University; Thomas Jefferson National Accelerator Facility] (ORCID:0000000226765517), Mai, Maxim [University of Bern; The George Washington University], Alexandru, Andrei [The George Washington University; University of Maryland] (ORCID:0000000345471554), Lee, Frank X. [The George Washington University] (ORCID:0000000181693440). 2026-08-11. Coupled-channel approach to isotensor π π π scattering from lattice QCD. https://doi.org/10.1103/dbm5-w8wx
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