Beam-target double spin asymmetries in the reaction (γ)over-right-arrow(d)over-right-arrow → πNN near threshold with final-state rescattering effects

被引：4

作者：

Darwish, E. M. ^{[1
,2
]}

Almarashi, M. M. ^{[1
]}

Yousef, M. Saleh ^{[1
,3
]}

机构：

[1] Taibah Univ, Fac Sci, Dept Phys, Medina 41411, Saudi Arabia

[2] Sohag Univ, Fac Sci, Dept Phys, Sohag 82524, Saudi Arabia

[3] Cairo Univ, Dept Phys, Fac Sci, Giza 12613, Egypt

来源：

ANNALS OF PHYSICS | 2020年 / 420卷

关键词：

Meson production; Photoproduction reactions; Polarization phenomena in reactions; Final-state interactions; Polarized beams; Polarized targets; INCOHERENT ETA-PHOTOPRODUCTION; SCATTERING-LENGTH; POLARIZATION OBSERVABLES; SEPARABLE REPRESENTATION; 3-BODY ANALYSIS; REACTION GAMMA; CROSS-SECTION; DEUTERON; MESONS; PARAMETRIZATION;

D O I：

10.1016/j.aop.2020.168254

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Near-threshold incoherent pion photoproduction on the deuteron including final-state rescattering effects is investigated with special emphasize on the beam-target double spin asymmetries. The elementary gamma N -> pi N amplitude is taken from the unitary isobar MAID-2007 model which describes well the threshold region. We present the first results on all possible double spin asymmetries of the differential and total cross sections for both the charged- and neutral-pion production channels near threshold. We discuss the sensitivity of the estimated results to the NN and pi N final-state rescattering effects. It turns out that the role of NN-rescattering is significant, and its inclusion strongly affected the results for double spin asymmetries in the chargedand neutral-pion channels. We also find that the pi N-rescattering effect is insignificant in the case of charged-pion channels, whereas it has a noticeable contribution on most of double spin asymmetries in the neutral-pion channel. (c) 2020 Elsevier Inc. All rights reserved.

引用

页数：17

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