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arXiv 2202.08013hep-phhep-exnucl-exnucl-th
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全息QCD中高能π-质子和π-π弹性散射

Elastic pion-proton and pion-pion scattering at high energies in holographic QCD

Zhibo Liu, Wei Xie, Fei Sun, Shuang Li, Akira Watanabe

摘要:

在全息QCD模型中研究了高能π介子-质子和π介子-π介子散射的总截面和微分截面,重点研究了Pomeron交换对这些截面的主要贡献的Regge区. Pomeron用Regge化的自旋2粒子传播子描述,强子-Pomeron耦合用强子的引力形状因子给出,这些形状因子由自底向上的AdS/QCD模型得到.由于表征Pomeron轨道的参数在质子-质子散射的研究中已经确定,因此Pomeron-质子截面可以用一个可调参数来表示。一旦用π-质子总截面的实验数据确定了这个参数,就可以计算它的微分截面和π-π截面,而不需要任何附加参数。虽然目前可用的数据是有限的,它被发现,我们的计算是一致的。我们的预测是明确的,目前的模型可以在未来的实验设施进行测试。

英文摘要:

The total and differential cross sections of high energy pion-proton and pion-pion scattering are investigated in a holographic QCD model, focusing on the Regge regime in which the Pomeron exchange gives the dominant contribution to those cross sections. The Pomeron is described by the Reggeized spin-2 particle propagator, and the hadron-Pomeron couplings are given by gravitational form factors of the hadrons, which are obtained from the bottom-up AdS/QCD models. Since the parameters, which characterize the Pomeron trajectory, have been determined in a preceding study of the proton-proton scattering, the pion-proton cross sections can be expressed with a single adjustable parameter. Once this parameter is determined by the experimental data of the pion-proton total cross section, its differential cross section and the pion-pion cross sections can be calculated without any additional parameter. Although the currently available data are limited, it is found that our calculation is consistent with those. Our predictions are explicitly shown, and the present model can be tested at the future experimental facilities.

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。

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