Exploration of hyperfine interaction between constituent quarks via eta productions

Abstract

In this work, the different exchange freedom, one gluon, one pion or Goldstone boson, in constituent quark model is investigated, which is responsible to the hyperfine interaction between constituent quarks, via the combined analysis of the eta production processes, ${\pi }^{-}p\to \eta n$ and $\gamma p\to \eta p$. With the Goldstone-boson exchange, as well as the one-gluon or one-pion exchange, both the spectrum and observables, such as, the differential cross section and polarized beam asymmetry, are fitted to the suggested values of Particle Data Group and the experimental data. The first two types of exchange freedoms give acceptable description of the spectrum and observables while the one pion exchange can not describe the observables and spectrum simultaneously, so can be excluded. The experimental data for the two processes considered here strongly support the mixing angles for two lowest S11 sates and D13 states as about -30 and 6 degree respectively.

7 pages, 4 figures, 4 tables

References in corpus (13)

• Photoproduction of $\eta$ and $\eta \prime$ Mesons off Protons
• Differential cross sections for the reactions gamma p-> p eta and gamma p -> p eta-prime
• Measurement of eta photoproduction on the proton from threshold to 1500 MeV
• Measurement of the beam asymmetry in eta-photoproduction off the proton
• Further evidence for N(1900)P_{13} from photoproduction of hyperons
• Study of $\eta$ photoproduction on the proton in a chiral constituent quark approach via one-gluon-exchange model
• Covariant calculation of nonstrange decays of strange baryon resonances
• $\eta$ production off the proton in a Regge-plus-chiral quark approach
• Axial charges of the nucleon and N* resonances
• Chiral constituent quark model study of the process $\gamma p\to \eta p$
• Quark Forces from Hadron Spectroscopy
• 1/Nc expansion and the spin-flavor structure of the quark interaction in the constituent quark model
• Configuration Mixing of Quark States in Baryons