Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1892326 | Radiation Physics and Chemistry | 2007 | 4 Pages |
Abstract
We discuss how the analysis of the zeros of the functions introduced by Jost in 1946, acting individually or collectively, provides a comprehensive framework for describing resonances in single and multichannel collisions. In particular, we propose a generalization of the Wigner threshold law that copes with some deviations recently observed in opening reaction channels. We also pay special attention to the appearance of zeros of the s-wave Jost function in the fourth quadrant of the complex momentum plane, as analysed by Nussenzveig in 1959 but erroneously ruled out in following studies.
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Physical Sciences and Engineering
Physics and Astronomy
Radiation
Authors
P.A. Macri, F. Sánchez Plastic, R.O. Barrachina,