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dc.contributor.author | Vaandrager, Paul![]() |
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dc.contributor.author | Rakityansky, Sergei Anatoljevich![]() |
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dc.date.accessioned | 2016-08-05T07:46:08Z | |
dc.date.issued | 2016-02 | |
dc.description.abstract | A new parametrization of the multi-channel S S -matrix is used to fit scattering data and then to locate the resonances as its poles. The S S -matrix is written in terms of the corresponding “in” and “out” Jost matrices which are expanded in the Taylor series of the collision energy E E around an appropriately chosen energy E 0 E0 . In order to do this, the Jost matrices are written in a semi-analytic form where all the factors (involving the channel momenta and Sommerfeld parameters) responsible for their “bad behavior” (i.e., responsible for the multi-valuedness of the Jost matrices and for branching of the Riemann surface of the energy) are given explicitly. The remaining unknown factors in the Jost matrices are analytic and single-valued functions of the variable E E and are defined on a simple energy plane. The expansion is done for these analytic functions and the expansion coefficients are used as the fitting parameters. The method is tested on a two-channel model, using a set of artificially generated data points with typical error bars and a typical random noise in the positions of the points. | en_ZA |
dc.description.department | Physics | en_ZA |
dc.description.embargo | 2017-02-28 | |
dc.description.librarian | hb2016 | en_ZA |
dc.description.uri | http://www.worldscientific.com/worldscinet/ijmpe | en_ZA |
dc.identifier.citation | Vaandrager, P & Rakityansky, SA 2016, 'Extracting the resonance parameters from experimental data on scattering of charged particles', International Journal of Modern Physics E, vol. 25, no. 2, art #1650014. | en_ZA |
dc.identifier.issn | 0218-3013 (print) | |
dc.identifier.issn | 1793-6608 (online) | |
dc.identifier.other | 10.1142/S0218301316500142 | |
dc.identifier.uri | http://hdl.handle.net/2263/56211 | |
dc.language.iso | en | en_ZA |
dc.publisher | World Scientific Publishing | en_ZA |
dc.rights | © 2016 World Scientific Publishing Co. Electronic version of an article published as International Journal of Modern Physics E, vol. 25, no. 2, art. #1650014, 2016. doi : 10.1142/S0218301316500142. The original publication is available at : http://www.worldscientific.com/worldscinet/ijmpe. | en_ZA |
dc.subject | Jost matrix | en_ZA |
dc.subject | Multi-channel resonances | en_ZA |
dc.subject | Resonances | en_ZA |
dc.subject | Energy Riemann surface | en_ZA |
dc.subject | Coulomb forces | en_ZA |
dc.title | Extracting the resonance parameters from experimental data on scattering of charged particles | en_ZA |
dc.type | Postprint Article | en_ZA |