English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The effects of SU(6) breaking on the nucleon elastic form factors areinvestigated within the constituent quark model formulated on the light-front.It is shown that the kinematical SU(6) breaking caused by the Melosh rotationsof the quark spins as well as the dynamical SU(6) breaking due to themixed-symmetry component generated in the nucleon wave function by thespin-dependent terms of the quark-quark interaction, can affect both GEn(Q**2)and GMp(Q**2)/GMn(Q**2). The calculated GEn(Q**2) is found to be qualitativelyconsistent with existing data. while the calculations of GM(Q**2) based on theplus component of the current are found to be plagued by spurious effectsrelated to the loss of the rotational covariance in the light-front formalism.These unwanted effects can be avoided by considering the transverse y-componentof the current. In this way our light-front predictions are found to beconsistent with the data on both GEn(Q**2) and GMp(Q**2)/GMn(Q**2). Finally, itis shown that a suppression of the ratio GEp(Q**2)/GMp(Q**2) with respect tothe dipole-fit prediction can be expected in the constituent quark modelprovided the relativistic effects generated by the Melosh rotations of theconstituent spins are taken into account.Comment: latex 27 pp., 7 postscript figure

SU(6) breaking effects in the nucleon elastic electromagnetic form factors