AdS/QCD中无自旋目标的虚康普顿散射
Virtual Compton Scattering off a Spinless Target in AdS/QCD
摘要：
在反德西特（AdS）/QCD方法下研究了无自旋目标$γ^*P\toγ^*P'$的双虚康普顿散射.我们发现，一般结构所允许的洛伦兹不变性和规范不变性的康普顿振幅是不容易复制的AdS/QCD对应的标准配方。在软光子制度，半经典近似应该适用于最好的，我们表明，测量的目标，如带电π介子在真实的康普顿散射的电和磁的极化率，已经可以作为严格的测试。
英文摘要：
We study the doubly virtual Compton scattering off a spinless target $γ^*P\toγ^*P'$ within the Anti-de Sitter(AdS)/QCD formalism. We find that the general structure allowed by the Lorentz invariance and gauge invariance of the Compton amplitude is not easily reproduced with the standard recipes of the AdS/QCD correspondence. In the soft-photon regime, where the semi-classical approximation is supposed to apply best, we show that the measurements of the electric and magnetic polarizabilities of a target like the charged pion in real Compton scattering, can already serve as stringent tests.
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