γγ interactions with KLOE

[1]
. YANG C N. Phys. Rev., 1950, 77: 2422. Brodsky S J, Kinoshita T, Terazawa H. Phys. Rev. D, 1971,4: 15323. Nguyen F, Piccinini F, Polosa A D. Eur. Phys. J. C, 2006,47: 654. Nguyen F. Acta Phys. Polon. B, 2007, 38: 29675. Adinol M et al (KLOE collaboration). Nucl. Instrum.Meth. A, 2002, 488: 516. Adinol M et al (KLOE collaboration). Nucl. Instrum.Meth. A, 2002, 482: 3647. Adinol M et al (KLOE collaboration). Nucl. Instrum.Meth. A, 2002, 492: 1348. Ny eler A. These Proceedings9. Achasov M N et al (SND collaboration). Phys. Rev. D,2007, 76: 07710110. Ambrosino F et al (KLOE collaboration). Phys. Lett. B,2008, 669: 22311. Achasov M N et al (SND collaboration). Phys. Rev. D,2002, 66: 03200112. Achasov M N et al (SND collaboration). Phys. Rev. D,2001, 63: 07200213. Akhmetshin R R et al (CMD-2 collaboration). Phys. Lett.B, 2008, 669: 21714. Amsler C et al (Particle Data Group). Phys. Lett. B, 2008,667: 115. Aitala E M et al (E791 collaboration). Phys. Rev. Lett.,2001, 86: 77016. Muramatsu H et al (CLEO collaboration). Phys. Rev. Lett.,2002, 89: 251802; 2003, 90: 05990117. Ablikim M et al (BES collaboration). Phys. Lett. B, 2004,598: 14918. Venanzoni G. These Proceedings