Comment on "Spin and Orbital Angular Momentum in Gauge Theories: Nucleon Spin Structure and Multipole Radiation Revisited"
S. C. Tiwari
TL;DR
This paper provides a critical commentary on Chen et al's work regarding the decomposition of nucleon spin and angular momentum in gauge theories, highlighting conceptual clarifications and potential issues.
Contribution
It offers a detailed critique and clarification of the theoretical framework proposed by Chen et al, addressing ambiguities in gauge-invariant decomposition of spin and orbital angular momentum.
Findings
Clarifies conceptual issues in gauge-invariant spin decomposition
Identifies potential ambiguities in Chen et al's approach
Highlights the importance of gauge choices in angular momentum analysis
Abstract
This is a comment on Chen et al Letter PRL,100, 232002 (2008).
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Taxonomy
TopicsParticle Accelerators and Free-Electron Lasers · Superconducting Materials and Applications · Particle accelerators and beam dynamics