Change search
ReferencesLink to record
Permanent link

Direct link
Stockholm University, Faculty of Science, Department of Physics.
2013 (English)In: International Journal of Modern Physics E, ISSN 0218-3013, Vol. 22, no 5, UNSP 1350032- p.Article in journal (Refereed) Published
Abstract [en]

Within the proposed method, a set of experimental data points are fitted using a multi-channel S-matrix. Then the resonance parameters are located as its poles on an appropriate sheet of the Riemann surface of the energy. The main advantage of the method is that the S-matrix is constructed in such a way that it has proper analytic structure, i.e. for any number of two-body channels, the branching at all the channel thresholds is represented via exact analytic expressions in terms of the channel momenta. The way the S-matrix is constructed makes it possible not only to locate multi-channel resonances but also to extract their partial widths as well as to obtain the scattering cross-section in the channels for which no data are available. The efficiency of the method is demonstrated by two model examples of a single-channel and a two-channel problems, where known resonance parameters are rather accurately reproduced by fitting the pseudo-data artificially generated using the corresponding potentials.

Place, publisher, year, edition, pages
2013. Vol. 22, no 5, UNSP 1350032- p.
Keyword [en]
Jost matrix, multi-channel resonances, energy Riemann surface
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-92034DOI: 10.1142/S0218301313500328ISI: 000319839500013OAI: diva2:637227


Available from: 2013-07-17 Created: 2013-07-15 Last updated: 2013-07-17Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Elander, Nils O.
By organisation
Department of Physics
In the same journal
International Journal of Modern Physics E
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 35 hits
ReferencesLink to record
Permanent link

Direct link