Charged pion-pair photoproduction and electroproduction on the proton up to 1 GeV

Ong, S.; Wiele, J. Van de

doi:10.1103/physrevc.63.024614

Cited by 5 publications

(3 citation statements)

References 22 publications

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“…The functions f (+) l are symmetric with respect to the two pion momenta and contribute to two-pion states with total isospin T = 0, 2, and the f (−) l are antisymmetric and contribute to T = 1 states only. Our calculation of the reaction amplitude t µ1µ2 follows the same lines as in [2,3,4,10]. Namely, we use the traditional phenomenological Lagrangean approach with Born and resonance contributions on the tree level.…”

Section: The γN → ππN Modelmentioning

confidence: 99%

Double-pion photoproduction on nucleon and deuteron

2005

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Photoproduction of two pions on nucleon and deuteron is studied for photon energies from threshold up to Eγ = 1.5 GeV. For the elementary operator an effective Lagrangean approach is used with resonance and Born contributions. The model parameters are fixed by resonance decay widths and multipole analyses of single pion photoproduction. A satisfactory description of total cross sections of two-pion production on the proton for various charge channels is achieved, except for π 0 π 0 production for which a significant underestimation is found near threshold. The operator then serves for the evaluation of this reaction on the deuteron in the impulse approximation. In addition, N N rescattering in the final state is taken into account, but πN and ππ rescatterings are neglected. Results are presented for total cross sections and target asymmetries.PACS numbers: 13.60.-r, 13.60. Le, 21.45.+v,

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Section: The γN → ππN Modelmentioning

confidence: 99%

Double-pion photoproduction on nucleon and deuteron

2005

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“…The photoproduction of two pions on nucleons at low and intermediate energies (up to E γ ∼ 1 GeV) has been the subject of intense experimental [1][2][3][4][5][6] and theoretical [7][8][9][10][11][12][13][14][15][16][17][18][19] study. The works have been mainly motivated to understand the role of the many baryonic resonances involved in the process.…”

Section: Introductionmentioning

confidence: 99%

Helicity asymmetries in double pion photoproduction on the proton

Roca¹

2005

Nuclear Physics A

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Based on a prior model on double pion photoproduction on the proton, successfully tested in total cross sections and invariant mass distributions, we make a theoretical study of the angular dependence of helicity asymmetries from the interaction of circularly polarized photons with unpolarized protons. We show that this observable is sensitive to details of the internal mechanisms and, thus, represents a complementary test of the theoretical model.

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“…The expression of F virt is given in [1]. In G 0 experiment phase I, with an electron beam at 3 GeV, we are interested to know the inclusive pion and proton cross-section.…”

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confidence: 99%