Masses of ground and excited-state hadrons
| Autor: | Ian C. Cloët, Craig D. Roberts, Lei Chang, H. L. L. Roberts |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Particle physics
Bethe–Salpeter equation Meson Nuclear Theory Hadron FOS: Physical sciences Nuclear Theory (nucl-th) High Energy Physics - Phenomenology (hep-ph) interaction [pi nucleon] High Energy Physics - Lattice Hadron spectroscopy mass spectrum [meson] mass [quark] ddc:530 ground state mass spectrum [baryon] Nuclear Experiment (nucl-ex) mass [Delta] numerical calculations Nuclear Experiment Physics hadron spectroscopy High Energy Physics - Lattice (hep-lat) High Energy Physics::Phenomenology contact interaction bibliography excited state [hadron] Atomic and Molecular Physics and Optics Dyson-Schwinger equation Bethe-Salpeter equation Baryon Diquark High Energy Physics - Phenomenology coupled channel [model] diquark Nucleon Ground state |
| Zdroj: | Few-body systems 51, 1-25 (2011). doi:10.1007/s00601-011-0225-x |
| DOI: | 10.1007/s00601-011-0225-x |
| Popis: | We present the first Dyson-Schwinger equation calculation of the light hadron spectrum that simultaneously correlates the masses of meson and baryon ground- and excited-states within a single framework. At the core of our analysis is a symmetry-preserving treatment of a vector-vector contact interaction. In comparison with relevant quantities the root-mean-square-relative-error/degree-of freedom is 13%. Notable amongst our results is agreement between the computed baryon masses and the bare masses employed in modern dynamical coupled-channels models of pion-nucleon reactions. Our analysis provides insight into numerous aspects of baryon structure; e.g., relationships between the nucleon and Delta masses and those of the dressed-quark and diquark correlations they contain. 25 pages, 7 figures, 4 tables |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|