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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. 264-274.
ISSN 0370-2693

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Official URL: http://www.sciencedirect.com/science/article/pii/0370269395012400

## 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)/F-2, 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 one-parameter fit of the pi pi scattering data.

Item Type: | Article |
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Additional Information: | © 1996 Elsevier Science B.V.. |

Uncontrolled Keywords: | Perturbation-Theory, Collisions, Resonances, Amplitude, Sector |

Subjects: | Sciences > Physics |

ID Code: | 22779 |

Deposited On: | 13 Sep 2013 15:32 |

Last Modified: | 31 Dec 2020 00:01 |

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