Zero-Mode Contribution in Nucleon-Delta Transition

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dc.creatorYu, Jianghao
dc.creatorWang, Teng
dc.creatorJi, Chueng-Ryong
dc.creatorMa, Bo-Qiang
dc.date2007-08-01
dc.date.accessioned2026-07-07T11:18:20Z
dc.date.available2026-07-07T11:18:20Z
dc.descriptionWe investigate the transition form factors between nucleon and $Δ$(1232) particles by using a covariant quark-spectator-diquark field theory model in (3+1) dimensions. Performing a light-front calculation in parallel with the manifestly covariant calculation in light-front helicity basis, we examine the light-front zero-mode contribution to the helicity components of light-front good ("+") current matrix elements. Choosing the light-front gauge ($ε^+_{h=\pm}=0$) with circular polarization in Drell-Yan-West frame, we find that only the helicity components $({1\over 2}, {1\over 2})$ and $({1\over 2},-{1\over 2})$ of the good current receive the zero-mode contribution. Taking into account the zero-mode, we find the prescription independence in obtaining the light-front solution of form factors from any three helicity matrix elements with smeared light-front wavefunctions. The angular condition, which guarantees the full covariance of different schemes, is recovered.
dc.description16 latex pages, 7 figures, to appear in PRD
dc.identifierhttps://arxiv.org/abs/0708.0172
dc.identifierhttp://arxiv.org/abs/0708.0172
dc.identifierPhys.Rev.D76:074009,2007
dc.identifierdoi:10.1103/PhysRevD.76.074009
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/193310
dc.subjectHigh Energy Physics - Phenomenology
dc.titleZero-Mode Contribution in Nucleon-Delta Transition
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