QCD Predictions for Physical Multimeson Scattering Amplitudes
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.
Authors
- Stephen R. Sharpe (ORCID: https://orcid.org/0000-0003-0516-2597)
- Fernando Romero-López (ORCID: https://orcid.org/0000-0003-0239-1394)
- Sarah Skinner (ORCID: https://orcid.org/0000-0003-4326-9643)
- Andrew D. Hanlon (ORCID: https://orcid.org/0000-0001-8786-8053)
- Colin Morningstar (ORCID: https://orcid.org/0000-0002-0607-9923)
- Ben Hörz (ORCID: https://orcid.org/0000-0003-4062-7898)
- Zachary T. Draper (ORCID: https://orcid.org/0000-0003-3713-7871)
- Karl J. Friston
Institutions
- University of Bern (CH)
- Kent State University (US)
- University of Washington (US)
- Intel (Germany) (DE)
- Massachusetts Institute of Technology (US)
- Carnegie Mellon University (US)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2025-05-28
- DOI
- https://doi.org/10.1103/6nql-yrhw
- Citations
- 9
- Primary Topic
- Quantum Chromodynamics and Particle Interactions
- Type
- article
- Field-Weighted Citation Impact
- 16.83
Funders
- National Science Foundation
- U.S. Department of Energy