Unified Hamiltonian model for mesons and baryonsSupported by National Natural Science Foundation of China (11261130311, 11035006)
Wei Xie (Institute of High Energy Physics, Chinese Academy of Sciences, P. O. Box 918(4), Beijing 100049, China); Ping Wang (Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences, Beijing 100049, China, Institute of High Energy Physics, Chinese Academy of Sciences, P. O. Box 918(4), Beijing 100049, China)
A new Hamiltonian model is introduced to study the spectrum of light hadrons. It combines relativistic field theory with elements of the constituent quark model. In addition to the standard linear confining and pseudoscalar meson exchange interactions with predetermined parameters, an additional interaction with different covariant spin structures is examined. Using a large scale Monte Carlo variational procedure, the resulting model Hamiltonian provides a very good, unified description of the light quark baryon (both octet and decuplet) and meson spectra.