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Cho, Yongmin
School of Natural Science
Research Interests
  • Higher-dimensional Unified Field Theory
  • High Energy Physics and QCD Color Confinement

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NUCLEON SPIN IN QCD: OLD CRISIS AND NEW RESOLUTION

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Title
NUCLEON SPIN IN QCD: OLD CRISIS AND NEW RESOLUTION
Author
Cho, YongminGe, Mo-LinZhang, Pengming
Keywords
gauge-invariant decomposition of nucleon spin;  Proton spin crisis;  spin and angular momentum of quarks and gluons in nucleon
Issue Date
2012-10
Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
Citation
MODERN PHYSICS LETTERS A, v.27, no.31, pp. -
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.
URI
https://scholarworks.unist.ac.kr/handle/201301/3500
DOI
10.1142/S0217732312300327
ISSN
0217-7323
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