|Publication type:||Article in scientific journal|
|Type of review:||Peer review (publication)|
|Title:||Aspects of the ETH model of the pion-nucleon interaction|
|Published in:||Nuclear Physics A|
|Publisher / Ed. Institution:||Elsevier|
|Subjects:||High Energy Physics - Phenomenology|
|Subject (DDC):||530: Physics|
|Abstract:||The ETH model of the pion-nucleon (πN) interaction contains t-channel σ- and ρ-exchange graphs, as well as the s- and u-channel contributions with the well-established s and p baryon states with masses below 2 GeV as virtual particles; the model amplitudes obey crossing symmetry and isospin invariance. In the present work, we give the analytical expressions for the model contributions to the K-matrix elements up to (and including) the f waves. We also extract a new phase-shift solution after performing a partial-wave analysis of meson-factory π±p elastic-scattering data below 100 MeV; included in our results now are also the effects of the variation of the σ-meson mass in the interval which is currently recommended by the Particle-Data Group. Finally, we revisit the subject of the πN Σ term and, using the model amplitudes, obtain Σ=72.4±3.1 MeV. Our prediction agrees well with the result extracted with Olsson's method, after a few flaws in his paper were corrected.|
|Fulltext version:||Published version|
|License (according to publishing contract):||Licence according to publishing contract|
|Departement:||School of Engineering|
|Organisational Unit:||Institute of Applied Mathematics and Physics (IAMP) |
Institute of Mechatronic Systems (IMS)
|Appears in collections:||Publikationen School of Engineering|
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Matsinos, E., & Rasche, G. (2013). Aspects of the ETH model of the pion-nucleon interaction. Nuclear Physics A, 927, 147–194. https://doi.org/10.1016/j.nuclphysa.2014.04.021
Matsinos, E. and Rasche, G. (2013) ‘Aspects of the ETH model of the pion-nucleon interaction’, Nuclear Physics A, 927, pp. 147–194. Available at: https://doi.org/10.1016/j.nuclphysa.2014.04.021.
E. Matsinos and G. Rasche, “Aspects of the ETH model of the pion-nucleon interaction,” Nuclear Physics A, vol. 927, pp. 147–194, Nov. 2013, doi: 10.1016/j.nuclphysa.2014.04.021.
Matsinos, Evangelos, and Günther Rasche. “Aspects of the ETH Model of the Pion-Nucleon Interaction.” Nuclear Physics A, vol. 927, Nov. 2013, pp. 147–94, https://doi.org/10.1016/j.nuclphysa.2014.04.021.
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