Abstract
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 GeV2 for the elastic and up to 12 GeV2 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, and show that existing experimental data are indicative of a composite structure of the Roper resonance.
| Original language | English |
|---|---|
| Article number | 014032 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 89 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 27 Jan 2014 |
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ASJC Scopus subject areas
- Nuclear and High Energy Physics
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Electromagnetic structure of the nucleon and the Roper resonance in a light-front quark approach. / Obukhovsky, Igor T.; Faessler, Amand; Gutsche, Thomas; Lyubovitskij, Valery E.
In: Physical Review D - Particles, Fields, Gravitation and Cosmology, Vol. 89, No. 1, 014032, 27.01.2014.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electromagnetic structure of the nucleon and the Roper resonance in a light-front quark approach
AU - Obukhovsky, Igor T.
AU - Faessler, Amand
AU - Gutsche, Thomas
AU - Lyubovitskij, Valery E.
PY - 2014/1/27
Y1 - 2014/1/27
N2 - 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 GeV2 for the elastic and up to 12 GeV2 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, and show that existing experimental data are indicative of a composite structure of the Roper resonance.
AB - 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 GeV2 for the elastic and up to 12 GeV2 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, and show that existing experimental data are indicative of a composite structure of the Roper resonance.
UR - http://www.scopus.com/inward/record.url?scp=84894483157&partnerID=8YFLogxK
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U2 - 10.1103/PhysRevD.89.014032
DO - 10.1103/PhysRevD.89.014032
M3 - Article
VL - 89
JO - Physical review D: Particles and fields
JF - Physical review D: Particles and fields
SN - 1550-7998
IS - 1
M1 - 014032
ER -