Proper identification of the gluon spin

Properties of the recently proposed gauge-invariant gluon spin Sg are studied and compared to the usually defined “gluon polarization” Δg. By explicit 1-loop calculations in a quark state, it is found that Sg=59Δg. Furthermore, 45 of Sg can actually be identified as a “static-field” contribution and...

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Veröffentlicht in:	Physics letters. B 2011-05, Vol.700 (1), p.21-24
Hauptverfasser:	Chen, Xiang-Song, Sun, Wei-Min, Wang, Fan, Goldman, T.
Format:	Artikel
Sprache:	eng
Schlagworte:	Angular momentum Elementary particles Exact sciences and technology Gauge invariance Gluon spin Gluons Mathematical analysis Nuclear physics Nucleons Particle spin Physics Polarization Spin structure Static term The physics of elementary particles and fields
Online-Zugang:	Volltext
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