DOE OSTI · 2998165
QCD Predictions for Physical Multimeson Scattering Amplitudes
Abstract
We use lattice QCD calculations of the finite-volume spectra of systems of two and three mesons to determine, for the first time, three-particle scattering amplitudes with physical quark masses. Our results are for combinations of 𝜋 + and 𝐾 + , at a lattice spacing 𝑎 = 0.063 fm, and in the isospin-symmetric limit. We also obtain accurate results for maximal-isospin two-meson amplitudes, with those for 𝜋 + 𝐾 + and 2𝐾 + being the first determinations at the physical point. Dense lattice spectra are obtained using the stochastic Laplacian-Heaviside method, and the analysis leading to scattering amplitudes is done using the relativistic finite-volume formalism. Results are compared to chiral perturbation theory and to phenomenological fits to experimental data, finding good agreement.
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Dawid, Sebastian M. [Univ. of Washington, Seattle, WA (United States)] (ORCID:0000000184985254), Draper, Zachary T. [Univ. of Washington, Seattle, WA (United States)] (ORCID:0000000337137871), Hanlon, Andrew D. [Kent State Univ., Kent, OH (United States)] (ORCID:0000000187868053), Hörz, Ben [Intel Deutschland GmbH (Germany)] (ORCID:0000000340627898), Morningstar, Colin [Carnegie Mellon Univ., Pittsburgh, PA (United States)] (ORCID:0000000206079923), Romero-López, Fernando [Univ. of Bern (Switzerland); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)] (ORCID:0000000302391394), Sharpe, Stephen R. [Univ. of Washington, Seattle, WA (United States)] (ORCID:0000000305162597), Skinner, Sarah [Carnegie Mellon Univ., Pittsburgh, PA (United States)] (ORCID:0000000343269643). 2025-07-07. QCD Predictions for Physical Multimeson Scattering Amplitudes. https://doi.org/10.1103/6nql-yrhw
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