Influence of final-state interaction on incoherent pion photoproduction on the deuteron in the region of the Δ-resonance

Darwish, E. M.; Arenhövel, H.; Schwamb, M.

doi:10.1140/epja/i2002-10071-3

Cited by 62 publications

(138 citation statements)

References 24 publications

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“…In principle, the full treatment of all interaction effects requires a full unitary πNN three-body calculation. However, the treatment of the scattering amplitude in this work is completely analogous to previous work [1] . The transition M-matrix elements are calculated in the frame of time-ordered perturbation theory, using the elementary pion photoproduction operator introduced in Ref.…”

Section: Theoretical Modelmentioning

confidence: 89%

“…Following the formulation of the previous work [1] , the unpolarized differential cross section for pion photoproduction from the deuteron is given by All observables are determined by the photoproduction amplitude . In principle, the full treatment of all interaction effects requires a full unitary πNN three-body calculation.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…Since the advent of high duty-factor accelerators, such as MAMI in Mainz and ELSA in Bonn (Germany) or Jefferson-Lab in Newport News and LEGS in Brookhaven (USA), the study of single pion production reaction in intermediate energy nuclear physics has been getting more and more attention in recent years [1][2][3][4][5][6] . The main goal of this study is to investigate the structure of hadrons in the non-perturbative domain of Quantum Chromo-dynamics (QCD) and therefore the nature of strong interactions.…”

Section: Introductionmentioning

confidence: 99%

“…In the next section, we briefly review the model which we use in our calculations [1] . The results of the formalism to calculate the beamtarget double polarization asymmetries are presented and discussed in Section 3.…”

Section: Introductionmentioning

confidence: 99%

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Beam-Target Spin Asymmetries in Exclusive Pion Photoproduction of Deuteron

Al-Thoyaib¹

2009

sci

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Abstract. Beam-target double polarization asymmetries in the exclusive pion photoproduction reaction from the deuteron is investigated at photon energies close to threshold and near the ∆(1232)-resonance with inclusion of nucleon-nucleon and pionnucleon final state interaction effects. The elementary pion photoproduction amplitude from the free nucleon is taken from the unitary isobar MAID-2003 model. The interactions in the final nucleon-nucleon and pion-nucleon subsystems are taken in separable form. The role of final-state interaction effects on double spin asymmetries for circularly polarized photon and both vector and tensor polarized deuteron are found to be important. It must be taken into consideration in the analysis of future experimental measurements.

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Section: Theoretical Modelmentioning

confidence: 89%

Section: Theoretical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Beam-Target Spin Asymmetries in Exclusive Pion Photoproduction of Deuteron

Al-Thoyaib¹

2009

sci

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“…Examples for strong FSI effects reported in the literature are, for example, those for pion photoproduction off quasi-free nucleons [25,26,27,28]. However, for the same reactions (e.g., γd → (n)pπ 0 ) effects for polarization observables seem to be less important [29].…”

Section: Production In γN Reactionsmentioning

confidence: 99%

Production of η and η′ mesons on nucleons and nuclei

Krusche¹,

Wilkin²

2015

Progress in Particle and Nuclear Physics

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The production of η and η mesons in photon-and hadron-induced reactions on free and quasifree nucleons and on nuclei is reviewed. The extensive database on γN → ηN , for both proton and neutron targets, is described in detail and its implications for the search for N resonances much heavier than the dominant S 11 (1535) discussed. Though less is currently known about the production of the η or of ηπ pairs, these also offer tantalizing prospects in the search for the missing isobars. The more limited data available on pion-induced production are still necessary ingredients in the partial wave analysis discussed.The production of the η-meson in pp and pn collisions shows once again the strong influence of the S 11 (1535) isobar, which is in contrast to the relatively weak behaviour seen near threshold for η production. This difference is reflected in the important final state interaction effects of the η in nuclei that may even lead to this meson being "bound" in some systems. The evidence for this is reviewed for both γA and pA collisions. The inclusive photoproduction of η, η , and ηπ pairs from nuclei provides further information regarding the production mechanism and the interaction of the η and η with nuclei and the ηπ pairs may even allow access to low mass ηA systems that are forbidden in direct single-meson photoproduction.

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