NUCLEON SPIN IN QCD: OLD CRISIS AND NEW RESOLUTION-Reference-Cited by-同舟云学术

NUCLEON SPIN IN QCD: OLD CRISIS AND NEW RESOLUTION

Published:2012-10-04 Issue:31 Volume:27 Page:1230032
ISSN:0217-7323
Container-title:Modern Physics Letters A
language:en
Short-container-title:Mod. Phys. Lett. A

Author:

CHO Y. M.¹²³,GE MO-LIN⁴,ZHANG PENGMING⁵

Affiliation:

1. School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology, Ulsan 689-798, Korea

2. Department of Physics, Konkuk University, Seoul 143-701, Korea

3. School of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea

4. Theoretical Physics Division, Chern Institute of Mathematics, Nankai University, Tianjin 300071, China

5. Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000, China

Abstract

We clarify the on-going confusion on the long-standing gauge invariance problem of the nucleon spin decomposition to the spin and angular momentum of quarks and gluons. We provide two gauge-invariant decompositions of nucleon spin which have different physical meanings, using the gauge independent Abelian decomposition. The first one is based on the assumption that all (binding and valence) gluons contribute to the nucleon spin, but the second one is based on the assumption that only the binding gluons (and the quarks) contribute to it.

Publisher

World Scientific Pub Co Pte Lt

Subject

General Physics and Astronomy,Astronomy and Astrophysics,Nuclear and High Energy Physics

Link

https://www.worldscientific.com/doi/pdf/10.1142/S0217732312300327

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