Unitarity and gamma-gamma-]pi-pi in chiral perturbation-theory

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dc.contributor.authorDobado González, Antonio
dc.contributor.authorPeláez Sagredo, José Ramón
dc.date.accessioned2023-06-20T18:50:38Z
dc.date.available2023-06-20T18:50:38Z
dc.date.issued1993-02
dc.description.abstractThe direct chiral perturbation theory (ChPT) one-loop prediction for the production of two pions from two photons is compared with the recent Crystal Ball experimental data. The one-loop computation does not fit data even close to threshold because unitarity effects are important even at very low energies. However, when the constraints coming from unitarity and analyticity are included in a suitable way, the range of application of one-loop ChPT can be largely extended in agreement with the experiment.
dc.description.departmentDepto. de Física Teórica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/22862
dc.identifier.doi10.1007/BF01474345
dc.identifier.issn0170-9739
dc.identifier.officialurlhttp://dx.doi.org/10.1007/BF01474345
dc.identifier.relatedurlhttp://link.springer.com
dc.identifier.urihttps://hdl.handle.net/20.500.14352/58751
dc.issue.number3
dc.journal.titleZeitschrift Fur Physik C-Particles and Fields
dc.page.final510
dc.page.initial501
dc.publisherSpringer Verlag
dc.rights.accessRightsmetadata only access
dc.subject.cdu53
dc.subject.keywordPhysics
dc.subject.keywordParticles and Fields
dc.subject.ucmFísica (Física)
dc.subject.unesco22 Física
dc.titleUnitarity and gamma-gamma-]pi-pi in chiral perturbation-theory
dc.typejournal article
dc.volume.number57
dspace.entity.typePublication
relation.isAuthorOfPublication16523fad-99a9-422c-9a8e-c949ccffadec
relation.isAuthorOfPublication70900239-cb8b-49f3-931f-9dc6a8b7d8d5
relation.isAuthorOfPublication.latestForDiscovery16523fad-99a9-422c-9a8e-c949ccffadec

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