A Quark Model Calculation of gamma gamma to pi pi Including Final State Interactions

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dc.creatorBlundell, H. G.
dc.creatorGodfrey, S.
dc.creatorHay, G.
dc.creatorSwanson, E. S.
dc.date1999-08-30
dc.date1999-12-08
dc.date.accessioned2026-07-07T10:53:11Z
dc.date.available2026-07-07T10:53:11Z
dc.descriptionA quark model calculation of the processes gamma gamma -> pi+ pi- and gamma gamma -> pi0 pi0 is performed. At tree level, only charged pions couple to the initial state photons and neutral pions are not expected in the final state. However, a small but significant gamma gamma -> pi0 pi0 cross section is observed. We demonstrate that this may be accounted for by a rotation in isospin space induced by final state interactions. The resulting pi+ pi- cross section is in good agreement with experiment while the pi0 pi0 cross section is in qualitative agreement with the data.
dc.description22 Revtex pages, 5 postscript figures
dc.identifierhttps://arxiv.org/abs/hep-ph/9908509
dc.identifierhttp://arxiv.org/abs/hep-ph/9908509
dc.identifierPhys.Rev.C61:025203,2000
dc.identifierdoi:10.1103/PhysRevC.61.025203
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/185399
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleA Quark Model Calculation of gamma gamma to pi pi Including Final State Interactions
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