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dc.contributor.authorPeccei, R.
dc.contributor.authorSolà Peracaula, Joancat
dc.description.abstractWe discuss the speculation that the sharp positron lines and correlated e/sup +/e/sup -/ and ..gamma gamma.. signals seen in heavy-ion collisions may be evidence for a new phase of QED. We examine several characteristics of the data which argue for this interpretation and point out further experimental observations which would favor this hypothesis. However, we detail also theoretical difficulties and experimental contradictions which considerably weaken the basis for this speculation. In particular, we argue that for the formation of a new phase or a solitonlike structure in QED it is necessary that nonlinear effects in electrodynamics become important. Even though Z..cap alpha.. is large, these effects always entail a suppression factor of ..cap alpha.., which is difficult to overcome.-
dc.publisherThe American Physical Societyeng
dc.relation.isformatofReproducció digital del document publicat en format paper, proporcionada per PROLA i
dc.relation.ispartofPhysical Review D, 1988, vol. 37, núm. 9, p. 2492-2498cat
dc.rights(c) The American Physical Society, 1988eng
dc.sourceArticles publicats en revistes (Física Quàntica i Astrofísica)-
dc.subject.classificationReaccions nuclearscat
dc.subject.classificationElectrodinàmica quànticaca
dc.subject.classificationPartícules (Física nuclear)cat
dc.subject.otherNuclear reactionseng
dc.subject.otherQuantum electrodynamicseng
dc.subject.otherParticles (Nuclear physics)eng
dc.titleNew phase of QED?eng
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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