由TOTEM在LHC获得的第一衍射最小值数据对pp散射振幅的限制
Restrictions on pp scattering amplitude imposed by first diffraction minimum data obtained by TOTEM at LHC
摘要：
本文在准程函Gribov-Regge方法的框架下，考虑么正性条件，系统地分析了弹性pp散射截面在衍射峰和第一衍射极小值区域的行为。我们使用的形式主义考虑到pomeron签名因子对$t$的依赖性。我们表明，虽然在这种方法中可以描述PP散射的一般特征，PP弹性微分截面的行为在LHC的TOTEM实验测量的第一个衍射最小值附近不能复制下的任何参数值在标准假设的模型。物理上，在准程函Regge方法中，质子被证明是“灰色”的，而且相当大，而TOTEM数据表明，在LHC能量下，它更小，更接近“黑色”。
英文摘要：
We present the systematic analysis of the behavior of elastic pp scattering cross section in the region of the diffraction peak and the first diffraction minimum in the framework of quasi-eikonal Gribov-Regge approach, taking into account the unitarity condition. We use the formalism taking into consideration the dependence of pomeron signature factor on $t$. We show that although in this approach one can describe the general features of pp scattering, the behavior of pp elastic differential cross section in the vicinity of the first diffraction minimum measured by the TOTEM experiment at LHC can not be reproduced under any parameter values at standard assumptions of the model. Physically, in the quasi-eikonal Regge approach the proton proved to be "gray" and rather large, whereas the TOTEM data indicate that it is smaller and closer to "black" at LHC energies.
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