QCD mixing effects in a gauge-invariant quark model for photo- and electroproduction of baryon resonances

1990 ◽  
Vol 42 (7) ◽  
pp. 2207-2214 ◽  
Author(s):  
Zhenping Li ◽  
Frank E. Close
Keyword(s):  
Quark Model ◽  
Gauge Invariant ◽  
Mixing Effects ◽  
Baryon Resonances

A CALCULATION OF THE MAGNETIC MOMENT OF THE Δ++

1993 ◽  
Vol 08 (34) ◽  
pp. 3283-3290
Author(s):  
MILTON DEAN SLAUGHTER
Keyword(s):  
Quark Model ◽  
Magnetic Moment ◽  
Broken Symmetry ◽  
Flavor Symmetry ◽  
Perturbative Calculation ◽  
Gauge Invariant ◽  
Equal Time ◽  
Asymptotic Level ◽  
Equal Time Commutation ◽  
Static Quark

A fully relativistic, gauge-invariant, and non-perturbative calculation of the Δ++ magnetic moment, μΔ++, is made using equal-time commutation relations (ETCRs) and the dynamical concepts of asymptotic SU F(2) flavor symmetry and asymptotic level realization. Physical masses of the Δ and nucleon are used in this broken symmetry calculation. It is found that μΔ++=2.04μp, where μp is the proton magnetic moment. This result is very similar to that obtained by using SU(6) ⊗ O(3) symmetry or the static quark model.

THE CHIRAL QUARK MODEL AND BARYON PHENOMENOLOGY

2005 ◽  
Vol 20 (08n09) ◽  
pp. 1785-1790 ◽  
Author(s):  
D. O. RISKA
Keyword(s):  
Quark Model ◽  
Form Factors ◽  
Axial Current ◽  
Chiral Quark Model ◽  
Pion Decay ◽  
Decay Widths ◽  
Nucleon Form Factors ◽  
Baryon Spectra ◽  
Baryon Resonances ◽  
Covariant Quark Model

The chiral quark model posits that pions couple to the axial current of constituent quarks. This chiral pion coupling governs the pion decays of baryon resonances and also implies pion and multipion interactions between the quarks. The qualitative features of this model for the description of pionic decay widths and baryon spectra are outlined. When the covariant quark model wave function for the nucleon is chosen so as to describe the empirical nucleon form factors the pion decay widths of the positive parity resonances are underpredicted. This indicates the presence of significant multiquark components in these resonances.

Baryon Resonances in a Constituent Quark Model

2000 ◽  
Vol 137 ◽  
pp. 169-188 ◽  
Author(s):  
Masaki Arima ◽  
Keiichi Masutani ◽  
Toru Sato
Keyword(s):  
Quark Model ◽  
Constituent Quark ◽  
Constituent Quark Model ◽  
Baryon Resonances

scholarly journals Decays of Baryon Resonances. I: Equivalence of an l-broken SU(6)W Model to a Quark Model

1978 ◽  
Vol 59 (1) ◽  
pp. 291-293 ◽  
Author(s):  
S. Ishida ◽  
M. Oda ◽  
J. Otokozawa
Keyword(s):  
Quark Model ◽  
Baryon Resonances

Higher Meson and Baryon Resonances in aSU(18)Quark Model

1966 ◽  
Vol 145 (4) ◽  
pp. 1269-1272 ◽  
Author(s):  
Asher Peres
Keyword(s):  
Quark Model ◽  
Baryon Resonances

Mixing effects in a multiple-charmed-quark model

1976 ◽  
Vol 14 (11) ◽  
pp. 3229-3232
Author(s):  
Edward Farhi
Keyword(s):  
Quark Model ◽  
Mixing Effects ◽  
Charmed Quark

Symmetric Quark Model of Baryon Resonances

1968 ◽  
Vol 172 (5) ◽  
pp. 1850-1850 ◽  
Author(s):  
O. W. Greenberg ◽  
M. Resnikoff
Keyword(s):  
Quark Model ◽  
Baryon Resonances
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