How precisely can the difference method determine the pion-nucleon coupling constant?

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dc.creatorLoiseau, B.
dc.creatorEricson, T. E. O.
dc.date2000-02-08
dc.date.accessioned2026-07-07T12:39:59Z
dc.date.available2026-07-07T12:39:59Z
dc.descriptionThe Coulomb-like backward peak of the neutron-proton scattering differential cross section is due to one-pion exchange. Extrapolation to the pion pole of precise data should allow to obtain the value of the charged pion-nucleon coupling constant. This was classically attempted by the use of a smooth physical function, the Chew function, built from the cross section. To improve accuracy of such an extrapolation one has introduced a difference method. It consists of extrapolating the difference between the Chew function based on experimental data and that built from a model where the pion-nucleon coupling is exactly known. Here we cross-check to which precision can work this novel extrapolation method by applying it to differences between models and between data and models. With good reference models and for the 162 MeV neutron-proton Uppsala single energy precise data with a normalisation error of 2.3 %, the value of the charged pion-nucleon coupling constant is obtained with an accuracy close to 1.8 %.
dc.descriptionTalk given at the Workshop on "Critical points in the determination of the pion-nucleon coupling constant", Uppsala, June 7-8, 1999, 24 pages, 11 figures, to appear in the proceedings of the Workshop in Physica Scripta
dc.identifierhttps://arxiv.org/abs/hep-ph/0002085
dc.identifierhttp://arxiv.org/abs/hep-ph/0002085
dc.identifierPhys.Scripta T87:53-61,2000
dc.identifierdoi:10.1238/Physica.Topical.087a00053
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/219315
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleHow precisely can the difference method determine the pion-nucleon coupling constant?
dc.typetext

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