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arXiv 0907.1084hep-phhep-th
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AdS/QCD中Pomeron对p-p和p-bar p散射的贡献

The Pomeron contribution to p p and p bar p scattering in AdS/QCD

Sophia K. Domokos, Jeffrey A. Harvey, Nelia Mann

摘要:

本文从QCD弦对偶模型的观点出发,研究了Regge区质子-质子和质子-反质子散射的微分截面和总截面。我们认为微分截面中出现的形状因子与质子态之间应力张量的矩阵元有关,并给出了计算波密子轨迹与质子耦合强度的方法。我们在Sakai-Sugimoto模型中计算这种耦合,并在大$s$和小$t$中发现与数据非常一致。形状因子可以在Skyrme模型或AdS/QCD模型中估计,并且给出比常用的电磁形状因子更硬的形状因子,与我们对数据的拟合一致。我们的模型也是在很好的协议与实测比值的实部到虚部的前向散射振幅在大$s$。

英文摘要:

We consider the differential and total cross sections for proton-proton and proton-antiproton scattering in the Regge regime from the point of view of string dual models of QCD. We argue that the form factor which appears in the differential cross section is related to the matrix element of the stress tensor between proton states and give a procedure for computing the strength of the coupling of the Pomeron trajectory to the proton. We compute this coupling in the Sakai-Sugimoto model and find excellent agreement with the data at large $s$ and small $t$. The form factor can be estimated in the Skyrme model or in AdS/QCD models and gives a stiffer form factor than the commonly used electromagnetic form factor, in agreement with our fits to data. Our model is also in good agreement with the measured ratio of real to imaginary parts of the forward scattering amplitude at large $s$.

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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