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Electroexcitation of nucleon resonances from CLAS data on single pion electroproduction
- Source :
- Physical Review C, Physical Review C, 2009, 80, 055203 (22 p.). ⟨10.1103/PhysRevC.80.055203⟩, Physical Review C, American Physical Society, 2009, 80, 055203 (22 p.). ⟨10.1103/PhysRevC.80.055203⟩, Aznauryan, I G, Burkert, V D, Biselli, A S, Egiyan, H, Joo, K, Kim, W, Park, K, Smith, L C, Ungaro, M, Adhikari, K P, Anghinolfi, M, Avakian, H, Ball, J, Battaglieri, M, Batourine, V, Bedlinskiy, I, Bellis, M, Bookwalter, C, Branford, D, Briscoe, W J, Brooks, W K, Careccia, S L, Carman, D S, Cole, P L, Collins, P, Crede, V, D'Angelo, A, Daniel, A, De Vita, R, De Sanctis, E, Deur, A, Dey, B, Dhamija, S, Dickson, R, Djalali, C, Doughty, D, Dupre, R, El Alaoui, A, Elouadrhiri, L, Eugenio, P, Fedotov, G, Fegan, S, Forest, T A, Gabrielyan, M Y, Gilfoyle, G P, Giovanetti, K L, Girod, F X, Goetz, J T, Gohn, W, Watts, D P 2009, ' Electroexcitation of nucleon resonances from CLAS data on single pion electroproduction ', Physical Review C, vol. 80, no. 5, 055203, pp.-. https://doi.org/10.1103/PhysRevC.80.055203
- Publication Year :
- 2009
- Publisher :
- arXiv, 2009.
-
Abstract
- We present results on the electroexcitation of the low mass resonances Delta(1232)P33, N(1440)P11, N(1520)D13, and N(1535)S11 in a wide range of Q2. The results were obtained in the comprehensive analysis of JLab-CLAS data on differential cross sections, longitudinally polarized beam asymmetries, and longitudinal target and beam-target asymmetries for pion electroproduction off the proton. The data were analysed using two conceptually different approaches, fixed-t dispersion relations and a unitary isobar model, allowing us to draw conclusions on the model sensitivity of the obtained electrocoupling amplitudes. The amplitudes for the Delta(1232)P33} show the importance of a meson-cloud contribution to quantitatively explain the magnetic dipole strength, as well as the electric and scalar quadrupole transitions. They do not show any tendency of approaching the pQCD regime for Q2 N(1520)D13 and N(1535)S11 longitudinal helicity amplitudes with good precision.<br />23 pages, 17 figures
- Subjects :
- Nuclear and High Energy Physics
Roper resonance
Particle physics
Meson
Nuclear Theory
Hadron
FOS: Physical sciences
Elementary particle
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
01 natural sciences
TRANSITION FORM-FACTORS
RELATIVISTIC QUARK-MODEL
LIGHT-FRONT DYNAMICS
GAMMA-ASTERISK
NEUTRAL PIONS
HIGH-ENERGIES
REGION
PHOTOPRODUCTION
Q2
MESONS
Delta baryon
High Energy Physics - Experiment
Settore FIS/04 - Fisica Nucleare e Subnucleare
Nuclear physics
Nuclear Theory (nucl-th)
High Energy Physics - Experiment (hep-ex)
Pion
High Energy Physics - Phenomenology (hep-ph)
0103 physical sciences
TRANSITION FORM-FACTORS, RELATIVISTIC QUARK-MODEL, LIGHT-FRONT DYNAMICS, GAMMA-ASTERISK, NEUTRAL PIONS, HIGH-ENERGIES, REGION, PHOTOPRODUCTION, Q2, MESONS
Nuclear Experiment (nucl-ex)
010306 general physics
Nuclear Experiment
Physics
010308 nuclear & particles physics
Branching fraction
High Energy Physics - Phenomenology
High Energy Physics::Experiment
Nucleon
Subjects
Details
- ISSN :
- 24699985 and 24699993
- Database :
- OpenAIRE
- Journal :
- Physical Review C, Physical Review C, 2009, 80, 055203 (22 p.). ⟨10.1103/PhysRevC.80.055203⟩, Physical Review C, American Physical Society, 2009, 80, 055203 (22 p.). ⟨10.1103/PhysRevC.80.055203⟩, Aznauryan, I G, Burkert, V D, Biselli, A S, Egiyan, H, Joo, K, Kim, W, Park, K, Smith, L C, Ungaro, M, Adhikari, K P, Anghinolfi, M, Avakian, H, Ball, J, Battaglieri, M, Batourine, V, Bedlinskiy, I, Bellis, M, Bookwalter, C, Branford, D, Briscoe, W J, Brooks, W K, Careccia, S L, Carman, D S, Cole, P L, Collins, P, Crede, V, D'Angelo, A, Daniel, A, De Vita, R, De Sanctis, E, Deur, A, Dey, B, Dhamija, S, Dickson, R, Djalali, C, Doughty, D, Dupre, R, El Alaoui, A, Elouadrhiri, L, Eugenio, P, Fedotov, G, Fegan, S, Forest, T A, Gabrielyan, M Y, Gilfoyle, G P, Giovanetti, K L, Girod, F X, Goetz, J T, Gohn, W, Watts, D P 2009, ' Electroexcitation of nucleon resonances from CLAS data on single pion electroproduction ', Physical Review C, vol. 80, no. 5, 055203, pp.-. https://doi.org/10.1103/PhysRevC.80.055203
- Accession number :
- edsair.doi.dedup.....e405d19bf938769c6ea7a44019886553
- Full Text :
- https://doi.org/10.48550/arxiv.0909.2349