Double-pion photoproduction on nucleon and deuteron

被引：98

作者：

Fix, A ^{[1
]}

Arenhövel, H ^{[1
]}

机构：

[1] Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

来源：

EUROPEAN PHYSICAL JOURNAL A | 2005年 / 25卷 / 01期

关键词：

D O I：

10.1140/epja/i2005-10067-5

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Photoproduction of two pions on nucleon and deuteron is studied for photon energies from threshold up to E-gamma = 1.5 GeV. For the elementary operator an effective Lagrangian 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 pi(0)pi(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, NN rescattering in the final state is taken into account, but pi N and pi pi rescatterings are neglected. Results are presented for total cross sections and target asymmetries.

引用

页码：115 / 135

页数：21

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