γ*N → N* (1520) form factors in the spacelike region

被引:28
作者
Ramalho, G. [1 ]
Pena, M. T. [2 ]
机构
[1] Univ Fed Rio Grande do Norte, Int Inst Phys, BR-59078400 Natal, RN, Brazil
[2] Univ Lisbon, IST, CFTP, P-1049001 Lisbon, Portugal
来源
PHYSICAL REVIEW D | 2014年 / 89卷 / 09期
关键词
ELECTROMAGNETIC-EXCITATION; MAGNETIC-MOMENTS; QUARK-MODEL; ELECTROPRODUCTION; NUCLEON; DELTA; HELICITY; MESONS; EQUATIONS; DECAYS;
D O I
10.1103/PhysRevD.89.094016
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The covariant spectator quark model is applied to the gamma*N -> N* (1520) reaction in the spacelike region. The spin quark core contributions to the electromagnetic form factors and helicity transition amplitudes are estimated from the covariant structure of the N* (1520) wave function calibrated by the experimental data for large squared momentum transfer Q(2). The difference between the model results and the experimental data is then used to parametrize the low Q(2) behavior, where meson cloud effects are assumed to dominate. This parametrization can be very useful for future studies of the reaction, as well as for the extension of the transition form factors to the timelike region.
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页数:25
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共 80 条
[1]  
Agakishiev G., 14033054 ARXIV
[2]   Electromagnetic transition form factors of negative parity nucleon resonances [J].
Aiello, M ;
Giannini, MM ;
Santopinto, E .
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 1998, 24 (04) :753-762
[3]   ELECTROPRODUCTION OF ETA-MESONS IN REGION OF RESONANCE S11(1535) [J].
ALDER, JC ;
BRASSE, FW ;
FEHRENBACH, W ;
GAYLER, J ;
HAIDAN, R ;
GLOE, G ;
GOEL, SP ;
KORBEL, V ;
KRECHLOK, W ;
MAY, J ;
MERKWITZ, M ;
SCHMITZ, R ;
WAGNER, W .
NUCLEAR PHYSICS B, 1975, 91 (03) :386-398
[4]   ELECTROPRODUCTION OF NEUTRAL PIONS IN RESONANCE REGION [J].
ALDER, JC ;
BRASSE, FW ;
FEHRENBACH, W ;
GAYLER, J ;
GOEL, SP ;
HAIDAN, R ;
KORBEL, V ;
MAY, J ;
MERKWITZ, M ;
NURIMBA, A .
NUCLEAR PHYSICS B, 1976, 105 (02) :253-271
[5]   Baryon decuplet to octet electromagnetic transitions in quenched and partially quenched chiral perturbation theory [J].
Arndt, D ;
Tiburzi, BC .
PHYSICAL REVIEW D, 2004, 69 (01)
[6]  
Aznauryan I., 09071901 ARXIV
[7]   STUDIES OF NUCLEON RESONANCE STRUCTURE IN EXCLUSIVE MESON ELECTROPRODUCTION [J].
Aznauryan, I. G. ;
Bashir, A. ;
Braun, V. M. ;
Brodsky, S. J. ;
Burkert, V. D. ;
Chang, L. ;
Chen, Ch ;
El-Bennich, B. ;
Cloet, I. C. ;
Cole, P. L. ;
Edwards, R. G. ;
Fedotov, G. V. ;
Giannini, M. M. ;
Gothe, R. W. ;
Gross, F. ;
Lin, Huey-Wen ;
Kroll, P. ;
Lee, T. -S. H. ;
Melnitchouk, W. ;
Mokeev, V. I. ;
Pena, M. T. ;
Ramalho, G. ;
Roberts, C. D. ;
Santopinto, E. ;
de Teramond, G. F. ;
Tsushima, K. ;
Wilson, D. J. .
INTERNATIONAL JOURNAL OF MODERN PHYSICS E, 2013, 22 (06)
[8]   Nucleon electromagnetic form factors and electroexcitation of low-lying nucleon resonances in a light-front relativistic quark model [J].
Aznauryan, I. G. ;
Burkert, V. D. .
PHYSICAL REVIEW C, 2012, 85 (05)
[9]   Electroexcitation of nucleon resonances [J].
Aznauryan, I. G. ;
Burkert, V. D. .
PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, 2012, 67 (01) :1-54
[10]   Electroexcitation of nucleon resonances from CLAS data on single pion electroproduction [J].
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. ;
Golovatch, E. .
PHYSICAL REVIEW C, 2009, 80 (05)