Holographic Baryons Static Properties and Form Factors from Gauge/String Duality
Abstract
In this paper, we study the properties of baryons by using a holographic dual of QCD on the basis of the D4/D8brane configuration, where baryons are described by a soliton. We first determine the asymptotic behavior of the soliton solution, which allows us to evaluate welldefined currents associated with the U(N_f)_L × U(N_f)_R chiral symmetry. Using the currents, we compute the static quantities of baryons such as charge radii and magnetic moments, and perform a quantitative comparison with experiments. It is emphasized that not only the nucleon but also excited baryons, such as Δ, N(1440), N(1535), etc., can be analyzed systematically in this model. We also investigate the form factors and find that our form factors agree well with the results that have been well established empirically. Using the form factors, the effective baryonbaryonmeson cubic coupling constants among their infinite towers in the model can be determined. Some physical implicati
ons following from these results are discussed.
 Publication:

Progress of Theoretical Physics
 Pub Date:
 December 2008
 DOI:
 10.1143/PTP.120.1093
 arXiv:
 arXiv:0806.3122
 Bibcode:
 2008PThPh.120.1093H
 Keywords:

 High Energy Physics  Theory;
 High Energy Physics  Phenomenology;
 Nuclear Theory
 EPrint:
 Latex 2e, 45 pages, v2: a figure is added to compare electromagnetic form factors with a dipole profile, v3: version published in PTP, v4: magnetic moments of Delta corrected