Nucleon Resonance Electrocouplings from Light-Front Quark Models at Q2 up to 12 GeV 2

Igor T. Obukhovsky, Amand Faessler, Thomas Gutsche, Valery E. Lyubovitskij

Результат исследований: Материалы для журналаСтатья

2 Цитирования (Scopus)

Аннотация

A relativistic light-front quark model is used to describe both the elastic nucleon and nucleon-Roper transition form factors in a large Q2 range, up to 35 GeV 2 for the elastic and up to 12 GeV 2 for the resonance case. Relativistic three-quark configurations satisfying the Pauli exclusion principle on the light-front are used for the derivation of the current matrix elements. The Roper resonance is considered as a mixed state of a three-quark core configuration and a molecular N+ σ hadron component. Based on this ansatz we obtain a realistic description of both processes, elastic and inelastic, in the sector of positive parity and show that existing experimental data are indicative of a composite structure of the Roper resonance. A useful generalization of this technique is suggested for description of negative parity nucleon resonances 1/2-,3/2-,5/2-.

Язык оригиналаАнглийский
Страницы (с-по)1001-1008
Число страниц8
ЖурналFew-Body Systems
Том57
Номер выпуска11
DOI
СостояниеОпубликовано - 1 ноя 2016

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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