RT Journal Article
T1 A note on the gamma gamma->pi(0)pi(0) reaction in the 1/N expansion of chi PT
A1 Dobado González, Antonio
A1 Morales, J.
AB 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.
PB Elsevier Science BV
SN 0370-2693
YR 1996
FD 1996-01-04
LK https://hdl.handle.net/20.500.14352/58735
UL https://hdl.handle.net/20.500.14352/58735
LA eng
NO © 1996 Elsevier Science B.V..This work has been supported in part by the Ministerio de Education y Ciencia (Spain) (CICYT AEN93- 0776) and COLCIENCIAS (Colombia). The authors thank F. Cornet, J.F. Donoghue, J. Gasser and J.R. Pelaez for useful information and discussions.
NO Ministerio de Education y Ciencia (Spain)
NO CICYT
NO COLCIENCIAS (Colombia)
DS Docta Complutense
RD 22 abr 2025