Coherent π0 photo-production on 4He at intermediate energies with polarized photons

Bellini, V.; Capogni, M.; Caracappa, A.; Casano, L.; D’Angelo, A.; Ghio, F.; Girolami, B.; Hoblit, S.; Hu, Li-Xiang; Khandaker, M.; Kistner, O. C.; Miceli, L.; Moricciani, D.; Sandorfi, A. M.; Schaerf, C.; Sperduto, M. L.; Thorn, C.

doi:10.1016/s0375-9474(98)00628-9

Cited by 11 publications

(1 citation statement)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4 the prediction of our model is compared with the new experimental data from Ref. [33]. The energy dependence for the total cross section and the parameters V 1 are shown in Fig.…”

Section: Resultsmentioning

confidence: 93%

Medium effects in coherent pion photo- and electroproduction on He and C

et al. 1999

View full text Add to dashboard Cite

Coherent π 0 photo-and electroproduction on 4 He and 12 C nuclei is investigated in the framework of a distorted wave impulse approximation in momentum space. The elementary process is described by the recently developed unitary isobar model. Medium effects are considered by introducing a phenomenological ∆ self-energy. The recent experimental data for 4 He and 12 C can be well described over a wide range of energies and emission angles by the assumption that the ∆-nuclear interaction saturates.

show abstract

“…4 the prediction of our model is compared with the new experimental data from Ref. [33]. The energy dependence for the total cross section and the parameters V 1 are shown in Fig.…”

Section: Resultsmentioning

confidence: 93%

Medium effects in coherent pion photo- and electroproduction on He and C

et al. 1999

View full text Add to dashboard Cite

show abstract

Effective Lagrangian Approach to pion photoproduction from the nucleon

2006

View full text Add to dashboard Cite

We present a pion photoproduction model on the free nucleon based on an Effective Lagrangian Approach (ELA) which includes the nucleon resonances ($\Delta(1232)$, N(1440), N(1520), N(1535), $\Delta (1620)$, N(1650), and $\Delta (1700)$), in addition to Born and vector meson exchange terms. The model incorporates a new theoretical treatment of spin-3/2 resonances, first introduced by Pascalutsa, avoiding pathologies present in previous models. Other main features of the model are chiral symmetry, gauge invariance, and crossing symmetry. We use the model combined with modern optimization techniques to assess the parameters of the nucleon resonances on the basis of world data on electromagnetic multipoles. We present results for electromagnetic multipoles, differential cross sections, asymmetries, and total cross sections for all one pion photoproduction processes on free nucleons. We find overall agreement with data from threshold up to 1 GeV in laboratory frame.Comment: Misprints corrected. 60 pages. 33 figures.5 tables. Accepted for publication in Annals of Physics (NY

show abstract