论文标题
字符串理论的范围和局限性质子结构的双重描述
Scope and limitations of a string theory dual description of the proton structure
论文作者
论文摘要
在自上而下的全息二重描述的框架内研究了来自Spin-1/2 Hadron的电磁深度非弹性散射的对称和反对称结构的功能。我们考虑BPST Pomeron，类型IIB超弦理论散射幅度和ADS $ _5 \ times s^5 $上的IIB超级重力。在所有情况下，都使用硬壁处方。 Bjorken变量$ x $的不同运动区域以及虚拟光子$ Q^2 $的平方动量，以$ f_2^p $和$ g_1^p $结构功能的详细研究。此外，研究了质子$ A_1^p $的虚拟康普顿散射不对称。介绍了与几个实验合作的数据的比较。此外，全息pomeron为上述可观察到的$ x $值提供了预测。特别是，我们提出了$ g_1^p $ at $ q^2 $左右10 Gev $^2 $的预测，预计将在未来的电子离子对撞机中测量的数据。讨论了这种全息双重方法的局限性。
Symmetric and antisymmetric structure functions from electromagnetic deep inelastic scattering of charged leptons off spin-1/2 hadrons are investigated in the framework of a top-down holographic dual description. We consider the BPST Pomeron, type IIB superstring theory scattering amplitudes, and type IIB supergravity on AdS$_5 \times S^5$. In all cases it is used the hard-wall prescription. Different kinematic regions of the Bjorken variable $x$, as well as the squared momentum of the virtual photon $Q^2$, are studied in detail for $F_2^P$ and $g_1^P$ structure functions of the proton. Also, the virtual Compton scattering asymmetry of the proton $A_1^P$ is investigated. Comparison with data from several experimental collaborations is presented. In addition, the holographic Pomeron leads to predictions for the mentioned observables for very small $x$ values. In particular, we present predictions for $g_1^P$ at $Q^2$ around 10 GeV$^2$, for data expected to be measured in a future electron-ion collider. Limitations of this holographic dual approach are discussed.
