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- W2040378979 abstract "We analyse the baryon magnetic moments in a model that relates them to the parton spins $Delta u$, $Delta d$, $Delta s$, and includes a contribution from orbital angular momentum. The specific assumption is the existence of a 3-quark correlation (such as a flux string) that rotates with angular momentum $langle L_z rangle$ around the proton spin axis. A fit to the baryon magnetic moments, constrained by the measured values of the axial vector coupling constants $a^{(3)}=F+D$, $a^{(8)}=3F-D$, yields $langle S_z rangle = 0.08 pm 0.13$, $langle L_z rangle = 0.39 pm 0.09$, where the error is a theoretical estimate. A second fit, under slightly different assumptions, gives $langle L_z rangle = 0.37 pm 0.09$, with no constraint on $langle S_z rangle$. The model provides a consistent description of axial vector couplings, magnetic moments and the quark polarization $langle S_z rangle$ measured in deep inelastic scattering. The fits suggest that a significant part of the angular momentum of the proton may reside in a collective rotation of the constituent quarks." @default.
- W2040378979 created "2016-06-24" @default.
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- W2040378979 date "1997-09-01" @default.
- W2040378979 modified "2023-10-17" @default.
- W2040378979 title "Erratum: Baryon magnetic moments and proton spin: A model with collective quark rotation [Phys. Rev.D 55, 2644 (1997)]" @default.
- W2040378979 doi "https://doi.org/10.1103/physrevd.56.3159" @default.
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