By Carl Carlson
An exploration of advancements within the sector of three-quark platforms. Emphasis is given to the dialogue of experimental leads to the components of shape components, unpolarized and polarized constitution features, and baryon constitution and spectroscopy. Of specific curiosity are the theoretical advancements within the zone of generalized parton distributions and lattice quantum chromodynamics. The papers are taken from the 9th overseas convention at the constitution of Baryons, held in Newport information, Virginia in 2002.
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Example text
4 One-Gluon Exchange The spectrum of ground-state baryons suggests flavor-dependent short-range (contact) interactions between the quarks. One simple assumption is that at short distance, or high Q2,the exchange of a single gluon dominates the interactions between the quarks. This leads to a mass formula for the ground state baryons where (S3(r12))is a spatial expectation value of a delta function of the separation of a pair of quarks in the (symmetric) ground-state spatial wave function, and S , is the spin of quark i.
Bhaduri, Phys. Rev. D 35,3451 (1987). 23. P. Geiger and N. Isgur, Phys. Rev. Lett. 67,1066 (1991). 24. M. A. Pichowsky, S. Walawalkar and S. Capstick, Phys. Rev. D 60, 054030 (1999). 25. Danielle Morel, Florida State University PhD thesis, and in these proceedings. ELECTROEXCITATION OF NUCLEON RESONANCES VOLKER D. BURKERT Jefferson Lab, 12000 Jefferson Avenue, Newport News, VA23606 Recent elcctroproductiori results in the domain of schaniiel nucleon rcsoriaricc excitation arc prcsentcd. and preliminary data in the search for missing states will be discussed.
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