Article (Scientific journals)
Gauge-covariant canonical formalism revisited with application to the proton spin decomposition
Lorce, Cédric
2013In Physical Review. D, Particles, Fields, Gravitation, and Cosmology, D88, p. 044037
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Abstract :
[en] We revisit the gauge-covariant canonical formalism by separating explicitly physical and gauge degrees of freedom. We show in particular that the gauge-invariant linear and angular momentum operators proposed by Chen et al. can consistently be derived from the standard procedure based on Noether’s theorem. Finally, we demonstrate that this approach is essentially equivalent to the gauge-invariant canonical formalism based on the concept of Dirac variables. Because of many similarities with the background field method, the formalism developed here should also be relevant to general relativity and any metric theories.
Disciplines :
Physics
Author, co-author :
Lorce, Cédric ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Physique des astroparticules
Language :
English
Title :
Gauge-covariant canonical formalism revisited with application to the proton spin decomposition
Publication date :
2013
Journal title :
Physical Review. D, Particles, Fields, Gravitation, and Cosmology
ISSN :
1550-7998
eISSN :
1550-2368
Publisher :
American Physical Society, College Park, United States - Maryland
Volume :
D88
Pages :
044037
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 30 November 2013

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