Glue Spin of the Proton

Yi-Bo Yang; Raza Sabbir Sufian; Andrei Alexandru; Terrence Draper; Michael J. Glatzmaier; Keh-Fei Liu

Glue Spin of the Proton

High Energy Physics - Phenomenology 2016-03-24 v2 High Energy Physics - Lattice

Authors: Yi-Bo Yang , Raza Sabbir Sufian , Andrei Alexandru , Terrence Draper , Michael J. Glatzmaier , Keh-Fei Liu

Abstract

We report the progress on the lattice QCD calculation of the glue spin contribution to proton spin. This calculation is carried out with valence overlap fermion on 2+1 flavor DWF gauge configurations at two lattice spacings with the momentum of the frame in the kinematic range $0\leq p^2 \leq 2$ GeV $^2$ . A mild frame dependence is observed. The matching and mixing with large-momentum effective field theory are in progress. The unrenormalized result at $p^2=4$ GeV $^2$ with $O(a^2)$ correction gives $S_G$ = 0.13(3).

Keywords

proton spin glue spin contribution lattice qcd valence overlap fermion dwf gauge configurations large-momentum effective field theory

Cite

@article{arxiv.1603.05256,
  title  = {Glue Spin of the Proton},
  author = {Yi-Bo Yang and Raza Sabbir Sufian and Andrei Alexandru and Terrence Draper and Michael J. Glatzmaier and Keh-Fei Liu},
  journal= {arXiv preprint arXiv:1603.05256},
  year   = {2016}
}

Comments

Talk presented at the 33nd International Symposium on Lattice Field Theory, 24-30 July, 2015, Kobe, Japan. 7 pages, 4 figures, references updated

Glue Spin of the Proton

Abstract

Keywords

Cite

Comments

Related papers