Wakamatsu, M. (2012) Recent work on orbital angular momentum. Il nuovo cimento C, 35 (2). pp. 247-254. ISSN 1826-9885
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Abstract
We briefly review our recent works on the decomposition of the nucleon spin. We first point out that there exist two kinds of gauge-invariant decompositions of the nucleon spin, which are physically inequivalent. The quark and gluon orbital angular momenta (OAMs) appearing in one decomposition are basically the canonical OAMs, while the quark and gluon OAMs appearing in another decomposition are called the dynamical OAMs. It is shown that the dynamical OAMs of quarks and gluons in the nucleon can be related to definite high-energy deep-inelastic-scattering observables. On the other hand, we argue that the canonical OAMs of quarks and gluon in the nucleon does not correspond to direct observables, that is, they are meaningful only within a specific theoretical model of the nucleon.
| Item Type: | Article |
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| Uncontrolled Keywords: | Quantum chromodynamics ; Polarization in interactions and scattering |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 19 Apr 2020 14:06 |
| Last Modified: | 19 Apr 2020 14:06 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/17784 |
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