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The gluon spin in the chiral bag model

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The gluon spin in the chiral bag model

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dc.contributor.author	Lee, Hee-Jung
dc.contributor.author	Min, Dong-Pil
dc.contributor.author	Park, Byung Yoon
dc.contributor.author	Rho, Mannque
dc.contributor.author	Vento Torres, Vicente
dc.date.accessioned	2015-05-11T10:58:05Z
dc.date.available	2015-05-11T10:58:05Z
dc.date.issued	2000
dc.identifier.citation	Lee, Hee-Jung Min, Dong-Pil Park, Byung Yoon Rho, Mannque Vento Torres, Vicente 2000 The gluon spin in the chiral bag model Physics Letters B 491 3-4 257 262
dc.identifier.uri	http://hdl.handle.net/10550/43654
dc.description.abstract	We study the gluon polarization contribution at the quark model renormalization scale to the proton spin, Γ, in the chiral bag model. It is evaluated by taking the expectation value of the forward matrix element of a local gluon operator in the axial gauge A+=0. It is shown that the confining boundary condition for the color electric field plays an important role. When a solution satisfying the boundary condition for the color electric field, which is not the conventionally used but which we favor, is used, the Γ has a positive value for {\it all} bag radii and its magnitude is comparable to the quark spin polarization. This results in a significant reduction in the relative fraction of the proton spin carried by the quark spin, which is consistent with the small flavor singlet axial current measured in the EMC experiments.
dc.language.iso	eng
dc.relation.ispartof	Physics Letters B, 2000, vol. 491, num. 3-4, p. 257-262
dc.subject	Física
dc.title	The gluon spin in the chiral bag model
dc.type	journal article	es_ES
dc.date.updated	2015-05-11T10:58:05Z
dc.identifier.doi	10.1016/S0370-2693(00)01054-6
dc.identifier.idgrec	075377
dc.rights.accessRights	open access	es_ES