Virtual Compton scattering off a spinless target in AdS/QCD

被引:17
|
作者
Marquet, Cyrille [1 ]
Roiesnel, Claude [2 ]
Wallon, Samuel [3 ,4 ]
机构
[1] CEA Saclay, Inst Phys Theor, F-91191 Gif Sur Yvette, France
[2] Ecole Polytech, CNRS, Ctr Phys Theor, F-91128 Palaiseau, France
[3] Univ Orsay, CNRS, LPT, F-91405 Orsay, France
[4] Univ Paris 06, Fac Phys, UPMC, F-75252 Paris 05, France
来源
关键词
AdS-CFT Correspondence; Electromagnetic Processes and Properties; LOW-ENERGY PHOTONS;
D O I
10.1007/JHEP04(2010)051
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
We study the doubly virtual Compton scattering off a spinless target gamma*P --> gamma*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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页数:26
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