Quark and Glue Components of the Proton Spin from Lattice Calculation
High Energy Physics - Phenomenology
2016-03-23 v2 High Energy Physics - Lattice
Nuclear Theory
Abstract
The status of lattice calculations of the quark spin, the quark orbital angular momentum, the glue angular momentum and glue spin in the nucleon is summarized. The quark spin calculation is recently carried out from the anomalous Ward identity with chiral fermions and is found to be small mainly due to the large negative anomaly term which is believed to be the source of the `proton spin crisis'. We also present the first calculation of the glue spin at finite nucleon momenta.
Keywords
Cite
@article{arxiv.1504.06601,
title = {Quark and Glue Components of the Proton Spin from Lattice Calculation},
author = {Keh-Fei Liu},
journal= {arXiv preprint arXiv:1504.06601},
year = {2016}
}
Comments
Plenary talk presented at SPIN2014, the 21st International Symposium on Spin Physics, 16 pages, 6 figures, references added and typos corrected. arXiv admin note: text overlap with arXiv:1504.04052