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http://dspace.mediu.edu.my:8181/xmlui/handle/123456789/8534
Title: | Phase-shift definition for pion-nucleon scattering from chiral perturbation theory |
Issue Date: | 1-Jun-2013 |
Publisher: | Sociedade Brasileira de Física |
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. |
URI: | http://koha.mediu.edu.my:8181/jspui/handle/123456789/8534 |
Other Identifiers: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332004000200024 http://www.doaj.org/doaj?func=openurl&genre=article&issn=01039733&date=2004&volume=34&issue=1a&spage=259 |
Appears in Collections: | Physics and Astronomy |
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