Non-perturbative determination of meson masses and low-energy constants in large-N QCD
We provide first-principles non-perturbative determinations of the low-lying meson mass spectrum of large-N QCD in the ’t Hooft limit Nf/N → 0, as well as of three low-energy constants appearing in the QCD chiral expansion: the quark condensate Σ, the pion decay constant Fπ, and the next-to-leading-...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:dnet:digitalcsic_::5854d262bbcacb608ec3b7d6052442b9 |
| Acceso en línea: | http://hdl.handle.net/10261/429125 https://www.scopus.com/pages/publications/105024895758?origin=resultslist |
| Access Level: | acceso abierto |
| Palabra clave: | 1/N Expansion Chiral Symmetry Lattice QCD Vacuum Structure and Confinement |
| Sumario: | We provide first-principles non-perturbative determinations of the low-lying meson mass spectrum of large-N QCD in the ’t Hooft limit Nf/N → 0, as well as of three low-energy constants appearing in the QCD chiral expansion: the quark condensate Σ, the pion decay constant Fπ, and the next-to-leading-order coupling. Using the excited state masses in the π and ρ channels, we are able to investigate the behavior of their radial Regge trajectories. Concerning QCD low-energy constants, we are able to assess the magnitude of sub-leading corrections in 1/N by combining our N = ∞ results with previous finite-N determinations. Our calculation exploits large-N twisted volume reduction to efficiently perform numerical Monte Carlo simulations of the large-N lattice discretized theory. We employ several values of N up to N = 841, 5 values of the lattice spacing, and several values of the quark mass, to achieve controlled continuum and chiral extrapolations. © The Author(s) 2025. |
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