Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: New analysis of the low-energy π±p differential cross-sections of the CHAOS Collaboration
Authors: Matsinos, Evangelos
Rasche, G.
DOI: 10.1142/S0218301315500500
Published in: International Journal of Modern Physics E
Volume(Issue): 24
Issue: 7
Pages: 1550050
Issue Date: 2015
Publisher / Ed. Institution: World Scientific Publishing
ISSN: 0218-3013
Language: English
Subject (DDC): 530: Physics
Abstract: In a previous paper, we reported the results of a partial-wave analysis (PWA) of the pion–nucleon (πN) differential cross-sections (DCSs) of the CHAOS Collaboration and came to the conclusion that the angular distribution of their π+p data sets is incompatible with the rest of the modern (meson factory) database. The present work, re-addressing this issue, has been instigated by a number of recent improvements in our analysis, namely regarding the inclusion of the theoretical uncertainties when investigating the reproduction of experimental data sets on the basis of a given "theoretical" solution, modifications in the parametrization of the form factors of the proton and of the pion entering the electromagnetic part of the πN amplitude, and the inclusion of the effects of the variation of the σ-meson mass when fitting the ETH model of the πN interaction to the experimental data. The new analysis of the CHAOS DCSs confirms our earlier conclusions and casts doubt on the value for the πN Σ term, which Stahov, Clement and Wagner have extracted from these data.
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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