QCD predictions for physical multimeson scattering amplitudes
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2025
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866908435785711616 |
|---|---|
| author | Dawid, Sebastian M. Draper, Zachary T. Hanlon, Andrew D. Hörz, Ben Morningstar, Colin Romero-López, Fernando Sharpe, Stephen R. Skinner, Sarah |
| author_facet | Dawid, Sebastian M. Draper, Zachary T. Hanlon, Andrew D. Hörz, Ben Morningstar, Colin Romero-López, Fernando Sharpe, Stephen R. Skinner, Sarah |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_14348 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | QCD predictions for physical multimeson scattering amplitudes Dawid, Sebastian M. Draper, Zachary T. Hanlon, Andrew D. Hörz, Ben Morningstar, Colin Romero-López, Fernando Sharpe, Stephen R. Skinner, Sarah High Energy Physics - Lattice High Energy Physics - Phenomenology Nuclear Theory 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. |
| title | QCD predictions for physical multimeson scattering amplitudes |
| topic | High Energy Physics - Lattice High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2502.14348 |