Stability of the S matrix pole

Rajasekaran G.; Vasan S.S.

dc.contributor.author	Rajasekaran G.
dc.contributor.author	Vasan S.S.
dc.date.accessioned	2023-10-13T12:37:30Z
dc.date.available	2023-10-13T12:37:30Z
dc.date.issued	1990
dc.identifier	10.1007/BF02845762
dc.identifier.issn	3044289
dc.identifier.uri	https://dspace.imsc.res.in/xmlui/handle/123456789/748
dc.identifier.uri	https://www.ias.ac.in/article/fulltext/pram/034/03/0183-0192
dc.description.abstract	We show how the position and residue of the S matrix pole can remain stable under changes in the form of the parametrization of the S matrix elements. We also derive a relation among the shifts in the Breit-Wigner resonance parameters under the same changes and verify the relation numerically for the case of Δ(1232). Despite its stability, the pole does not provide a unique definition of the resonance because of the existence of shadow poles. © 1990 the Indian Academy of Sciences.
dc.language.iso	en
dc.relation.ispartof	Pramana, Vol. 34, Issue. 3
dc.rights	Open Access
dc.source	Pramana
dc.subject	Δ (1232) resonance
dc.subject	03.80
dc.subject	11.20
dc.subject	11.80
dc.subject	Breit-Wigner formula
dc.subject	resonance poles
dc.subject	S matrix
dc.subject	Scattering theory
dc.subject	shadow poles
dc.title	Stability of the S matrix pole
dc.description.pages	183 - 192
dc.relation.url	https://www.ias.ac.in/article/fulltext/pram/034/03/0183-0192
dc.publisher	Indian Academy of Sciences, Bangalore
dc.type	Article