Rajasekaran, G. ; Vasan, S. S. (1990) Stability of the S matrix pole Pramana - Journal of Physics, 34 (3). pp. 183-192. ISSN 0304-4289
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Official URL: http://www.ias.ac.in/j_archive/pramana/34/3/183-19...
Related URL: http://dx.doi.org/10.1007/BF02845762
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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Indian Academy of Sciences. |
| Keywords: | Scattering Theory; S Matrix; Resonance Poles; Δ(1232) Resonance; Breit-wigner Formula; Shadow Poles |
| ID Code: | 41094 |
| Deposited On: | 26 May 2011 11:47 |
| Last Modified: | 17 May 2016 22:57 |
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