Chiral Dynamics of Baryons from String Theory
High Energy Physics - Theory
2008-11-26 v2 High Energy Physics - Phenomenology
Nuclear Theory
Abstract
We study baryons in an AdS/CFT model of QCD by Sakai and Sugimoto, realized as small instantons with fundamental string hairs. We introduce an effective field theory of the baryons in the five-dimensional setting, and show that the instanton interpretation implies a particular magnetic coupling. Dimensional reduction to four dimensions reproduces the usual chiral effective action, and in particular we estimate the axial coupling between baryons and pions and the magnetic dipole moments, both of which are proportional to . We extrapolate to finite and discuss subleading corrections.
Cite
@article{arxiv.hep-th/0701276,
title = {Chiral Dynamics of Baryons from String Theory},
author = {Deog Ki Hong and Mannque Rho and Ho-Ung Yee and Piljin Yi},
journal= {arXiv preprint arXiv:hep-th/0701276},
year = {2008}
}
Comments
4 pages, typos fixed, discussions reworded to clarify a unit, a reference updated