Phase-shift definition for pion-nucleon scattering from chiral perturbation theory

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DC Field	Value	Language
dc.creator	Cavalcante Isabela P.	-
dc.creator	Borges J. Sá	-
dc.date	2004	-
dc.date.accessioned	2013-06-01T11:26:18Z	-
dc.date.available	2013-06-01T11:26:18Z	-
dc.date.issued	2013-06-01	-
dc.identifier	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332004000200024	-
dc.identifier	http://www.doaj.org/doaj?func=openurl&genre=article&issn=01039733&date=2004&volume=34&issue=1a&spage=259	-
dc.identifier.uri	http://koha.mediu.edu.my:8181/jspui/handle/123456789/8534	-
dc.description	Chiral Perturbation Theory is considered as a very precise method when applied to pion-nucleon scattering near threshold and in the unphysical region since in these cases the pion momenta are small. In this framework, third order calculation yields a non-relativistic scattering amplitude with nine free parameters. From the fact that the resulting partial-wave amplitudes do not respect elastic unitarity relation, one has that the phase-shift definition is ambiguous. In this article, we present the comparison of the model with experimental data for two different phase-shift formulas and we conclude that the results are very sensitive to phase-shift definition.	-
dc.publisher	Sociedade Brasileira de Física	-
dc.source	Brazilian Journal of Physics	-
dc.title	Phase-shift definition for pion-nucleon scattering from chiral perturbation theory	-
Appears in Collections:	Physics and Astronomy

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