Nucleon Momentum and Spin Decompositions

Journal Article · Wed Dec 14 00:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3667300· OSTI ID:22004000

Cho, Y M ^[1]

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1. School of Electrical and Computer Engineering, Ulsan National Institute of Science and Technology, Ulsan 689-798 (Korea, Republic of) and School of Physics and Astronomy, Seoul National University, Seoul 151-747 (Korea, Republic of)

We construct a gauge invariant canonical momentum operator which satisfies the canonical commutation relation to resolve the old controversy on the canonical versus kinematic momentum of a charged particle in gauge theories. With this we show how to obtain the gauge independent momentum and spin decompositions of composite particles to those of the constituents in QED and QCD, which has been thought to be impossible. Moerover, we show that there are two logically acceptable nucleom momentum and spin decompositions, depending on which gluons we identify as the constituent of nucleons.

• OSTI ID: 22004000
• Journal Information: AIP Conference Proceedings, Vol. 1418, Issue 1; Conference: PacSPIN2011: 8. Circum-Pan-Pacific symposium on high energy spin physics, Cairns, QLD (Australia), 20-24 Jun 2011; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHARGED PARTICLES
GAUGE INVARIANCE
GLUONS
NUCLEONS
PARTICLE KINEMATICS
PARTICLE STRUCTURE
QUANTUM CHROMODYNAMICS
QUANTUM ELECTRODYNAMICS
SPIN