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Dobado González, Antonio and Morales, J. (1996) A note on the gamma gamma>pi(0)pi(0) reaction in the 1/N expansion of chi PT. Physics Letters B, 365 (01/04/). pp. 264274. ISSN 03702693
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Official URL: http://www.sciencedirect.com/science/article/pii/0370269395012400
URL  URL Type 

http://www.sciencedirect.com  Publisher 
http://arxiv.org/abs/hepph/9511244  Organisation 
Abstract
In this work we present the results of a complete calculation of the gamma gamma > pi(0) pi(0) amplitude to leading order in the large N approximation (N being the number of Goldstone bosons) up to order m(pi)(2)/F2, The amplitude turns to be proportional a to that of pi(+)pi() > pi(0) pi(0). In spite of the fact that this factorization property cannot hold in general (as it was recently pointed our by Morgan and Penington), it appears here since in the large N limit only the I = J = 0 channel contributes to the gamma gamma > pi(0) pi(0) reaction. Moreover it seems to be a reasonable approximation in this case since it is possible to reproduce, as a prediction, the experimental data starting from a oneparameter fit of the pi pi scattering data.
Item Type:  Article 

Additional Information:  © 1996 Elsevier Science B.V.. 
Uncontrolled Keywords:  PerturbationTheory, Collisions, Resonances, Amplitude, Sector 
Subjects:  Sciences > Physics 
ID Code:  22779 
Deposited On:  13 Sep 2013 15:32 
Last Modified:  07 Feb 2014 10:51 
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