Leading Chiral Contributions to the Spin Structure of the Proton
High Energy Physics - Phenomenology
2009-11-07 v2 High Energy Physics - Lattice
Nuclear Theory
Abstract
The leading chiral contributions to the quark and gluon components of the proton spin are calculated using heavy-baryon chiral perturbation theory. Similar calculations are done for the moments of the generalized parton distributions relevant to the quark and gluon angular momentum densities. These results provide useful insight about the role of pions in the spin structure of the nucleon, and can serve as a guidance for extrapolating lattice QCD calculations at large quark masses to the chiral limit.
Keywords
Cite
@article{arxiv.hep-ph/0111048,
title = {Leading Chiral Contributions to the Spin Structure of the Proton},
author = {Jiunn-Wei Chen and Xiangdong Ji},
journal= {arXiv preprint arXiv:hep-ph/0111048},
year = {2009}
}
Comments
8 pages, 2 figures; a typo in Ref. 7 corrected