Coherent π0-Photoproduction on the Deuteron near Threshold and the Role of D-Wave Component of the Deuteron Wave Function
- 作者: Darwish E.1, Yousef M.1
-
隶属关系:
- Physics Department, Faculty of Science
- 期: 卷 74, 编号 6 (2019)
- 页面: 595-607
- 栏目: Physics of Nuclei and Elementary Particles
- URL: https://journals.rcsi.science/0027-1349/article/view/165211
- DOI: https://doi.org/10.3103/S0027134919060122
- ID: 165211
如何引用文章
详细
Near-threshold coherent photoproduction of π0-meson on the deuteron is investigated. Numerical results for the unpolarized differential and total cross sections, the linear photon Σ-asymmetry, the vector T11 and tensor T2M (M = 0, 1, 2) deuteron spin asymmetries, and the spin asymmetry \(\tilde{T}_{20}\) of the total cross section are presented. The role of D-wave component of the deuteron wave function on these physical observables is studied. The calculations are based on the impulse approximation in which we use the realistic and high-precision Bonn NN potential (full model) for the deuteron wave function and the unitary isobar MAID-2007 model for the elementary γN → πN amplitude that describes well the threshold region. We have found that the D-wave component has a negligible effect on the unpolarized cross sections and the vector deuteron T11-asymmetry at photon lab-energies close to threshold. On the contrary, we have obtained a significant role of the D-wave part of the deuteron wave function on the Σ, T2M, and \(\tilde{T}_{20}\) spin asymmetries. The results for the unpolarized differential cross section are compared to the experimental data from TAPS and a satisfactory agreement within the uncertainties has been obtained at forward pion angles. At backward pion angles, our results underestimate the experimental data and a disagreement has been found.
作者简介
E. Darwish
Physics Department, Faculty of Science; Physics Department, Faculty of Science
编辑信件的主要联系方式.
Email: darwish@science.sohag.edu.eg
沙特阿拉伯, Medina, 41411; Sohag, 82524
M. Yousef
Physics Department, Faculty of Science; Physics Department, Faculty of Science
Email: darwish@science.sohag.edu.eg
沙特阿拉伯, Medina, 41411; Giza, 12613