Glue Spin of the Proton

2016/03/16 by Yang, Yi-Bo, Sufian, Raza Sabbir, Alexandru, Andrei +3 · 1 citation
#FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.1603.05256

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≤ p² ≤ 2 GeV². A mild frame dependence is observed. The matching and mixing with large-momentum effective field theory are in progress. The unrenormalized result at p²=4 GeV² with O(a²) correction gives S_G = 0.13(3).

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