2004/11/17 by Klaus Goeke, Hyun-Chul Kim, Michał Praszałowicz +1
Physics and Astronomy · #Nuclear physics research studies #Quantum Chromodynamics and Particle Interactions #Quantum and Classical Electrodynamics #hep-ph
paper · pdf · doi:10.1016/j.ppnp.2005.01.028
published as Prog.Part.Nucl.Phys.55:350-373,2005 · 24 pages, 2 figures, To be published in Prog.Part. Nucl. Phys
arxiv created 2004/11/17 · openalex publication_date 2005/05/15 · arxiv updated 2011/04/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
After a quick look at the present status of experiments we shortly review in a first step the ongoing discussions on some of the basic theoretical approaches to pentaquarks: Chiral solitons, Large-Nc considerations, quark models, and lattice gauge approaches. In a second step we apply the chiral quark-soliton approach including linear ms-corrections to the calculation of magnetic moments of the baryons of the anti-decuplet. In this approach the parameters are fixed solely by experimental data for the magnetic moments of the baryon octet and for the masses of the octet, decuplet and of Θ+. The magnetic moment of Θ+ depends rather strongly on the pion-nucleon sigma term and reads -1.19 \rm n.m. to -0.33 \rm n.m. for ΣπN = 45 and 75 MeV respectively. As a byproduct the strange magnetic moment of the nucleon is obtained with a value of μ(s)N =+0.39 n.m.