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                                 Abstract:The fourth rank polarization tensor and the helicity amplitudes of γ-γ scattering via charged scalar meson loops in some non-standard models are calculated.They are expressed precisely and analytically in terms of three transcendental functions of B(u),T(u) and I(u,v).
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                        References
	
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				| [1] | Li Yangguo
								. Antiproton -Nucleus Charge Exchange Reaction and Inelastic Scattering. Chinese Physics C,
							1996, 20(11): 1021-1027. |  
				| [2] | HOU Ren-Chang
								, ZHAO Xuan
								. QUADRUPOLE-OCTUPOLE TWO-PHONON EXCITATIONS IN INELASTIC SCATTERING. Chinese Physics C,
							1983, 7(2): 236-244. |  
 
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