arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1001.3548hep-ph
收藏

受AdS/CFT启发的模型中的衍射深度非弹性散射:唯象研究

Diffractive deep inelastic scattering in an AdS/CFT inspired model: A phenomenological study

M. A. Betemps, V. P. Goncalves, J. T. de Santana Amaral

摘要:

非微扰QCD动力学的解析处理是强相互作用的主要开放问题之一。目前,只有考虑到其他类似QCD的理论,才有可能得到一些关于这种状态的定性信息,例如N=4的超级杨米尔斯(SYM),其中可以使用反德西特空间/共形场论(AdS/CFT)在大的t Hooft耦合的非微扰极限下进行计算。最近,在AdS/CFT方法中计算了高能散射振幅,并将其应用于深部非弹性散射(DIS),与$F_2$ HERA数据进行了对比。在这项工作中,我们扩展了非微扰AdS/CFT启发模型的衍射过程,并比较其预测与微扰方法的基础上Balitsky - Kovchegov(BK)方程。我们证明了AdS/CFT启发的模型不能描述当前的$F_2^{D(3)}$ HERA数据,并且在$10^{-7} \lesssim x_{IP} \lesssim 10^{-4}$范围内预测了与BK方程相似的行为。在较小的值$x_{IP}$的衍射结构函数被预测为能量无关。

英文摘要:

The analytical treatment of the nonperturbative QCD dynamics is one of main open questions of the strong interactions. Currently, it is only possible to get some qualitative information about this regime considering other QCD-like theories, as for example the N=4 super Yang-Mills (SYM), where one can perform calculations in the nonperturbative limit of large 't Hooft coupling using the Anti-de Sitter space/Conformal field theory (AdS/CFT). Recently, the high energy scattering amplitude was calculated in the AdS/CFT approach, applied to deep inelastic scattering (DIS) and confronted with the $F_2$ HERA data. In this work we extend the nonperturbative AdS/CFT inspired model for diffractive processes and compare its predictions with a perturbative approach based on the Balitsky - Kovchegov (BK) equation. We demonstrate that the AdS/CFT inspired model is not able to describe the current $F_2^{D(3)}$ HERA data and predicts a similar behavior to that from BK equation in the range $10^{-7} \lesssim x_{IP} \lesssim 10^{-4}$. At smaller values of $x_{IP}$ the diffractive structure function is predicted to be energy independent.

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。

↑