arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0810.3997nucl-th
收藏

中能区反质子-氘核弹性散射和自旋相关的反质子-氘核截面

Forward antiproton-deuteron elastic scattering and total spin-dependent antiproton-deuteron cross sections at intermediate energies

Yu. N. Uzikov, J. Haidenbauer

摘要:

自旋相关的总pbar-d截面被认为是使用光学定理。为此目的,前向pbar-d弹性散射振幅的全自旋依赖性被认为是在一个模型无关的方式。单散射近似用于将该振幅与pbar-p和pbar-n散射的基本振幅以及氘核形状因子相关联。发展了一种考虑极化pbar-d截面中库仑核干涉效应的形式。利用Julich小组提出的Nbar-N相互作用模型,在束流能量为20-300 MeV的条件下,对极化总pbar-d截面进行了数值计算。在Glauber方法内估计双散射效应,发现其在10- 20%的量级。微分pbar-d截面的现有实验数据与Glauber计算结果吻合良好。结果发现,对于所使用的Nbar-N模型的总纵向和横向pbar-d截面是可比的绝对值为pbar-p散射。

英文摘要:

Spin-dependent total pbar-d cross sections are considered using the optical theorem. For this aim the full spin dependence of the forward pbar-d elastic scattering amplitude is considered in a model independent way. The single-scattering approximation is used to relate this amplitude to the elementary amplitudes of pbar-p and pbar-n scattering and the deuteron form factor. A formalism allowing to take into account Coulomb-nuclear interference effects in polarized pbar-d cross sections is developed. Numerical calculations for the polarized total pbar-d cross sections are performed at beam energies 20-300 MeV using the Nbar-N interaction models developed by the Julich group. Double-scattering effects are estimated within the Glauber approach and found to be in the order of 10-20%. Existing experimental data on differential pbar-d cross sections are in good agreement with the performed Glauber calculations. It is found that for the used Nbar-N models the total longitudinal and transversal pbar-d cross sections are comparable in absolute value to those for pbar-p scattering.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑