Neutral-current weak pion production off the nucleon in covariant chiral perturbation theory
نویسندگان
چکیده
منابع مشابه
Pion–Pion and Pion–Nucleon Interactions in Chiral Perturbation Theory*
Elastic pion–pion and pion–nucleon scattering are reviewed in the context of chiral perturbation theory. Theoretical results from systematic low–energy expansions to O(p) for ππ and to O(p) for πN are compared with experimental data. Possible future developments are outlined. Talk given at the Workshop on Chiral Dynamics 1997 Mainz, Germany, Sept. 1 5, 1997 To appear in the Proceedings * Work s...
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De-Liang Yao, ∗ D. Siemens, † V. Bernard, ‡ E. Epelbaum, § A. M. Gasparyan, 4, ¶ J. Gegelia, 5, ∗∗ H. Krebs, †† and Ulf-G. Meißner 1, ‡‡ Institute for Advanced Simulation, Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425 Jülich, Germany Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780 Bochum, Germany Groupe de Physique Théoriqu...
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We study neutrino induced one-pion production off the nucleon in and around the Delta resonance region. Apart from the Delta-pole mechanism we include background terms required by chiral symmetry. These background terms give sizeable contributions in all channels. To better reproduce the ANL q-differential cross section data, we make a new fit of the C 5 (q ) axial nucleon to Delta form factor....
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The neutrino pion production off the nucleon is traditionally described in the literature by means of the weak excitation of the ∆(1232) resonance and its subsequent decay into Nπ . Here, we present results from a model that includes also some background terms required by chiral symmetry. We show that the contribution of these terms is sizeable and leads to significant effects in total and part...
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We match the results for the subthreshold parameters of pion-nucleon scattering obtained from a solution of Roy-Steiner equations to chiral perturbation theory up to next-to-next-to-next-to-leading order, to extract the pertinent low-energy constants including a comprehensive analysis of systematic uncertainties and correlations. We study the convergence of the chiral series by investigating th...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2019
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2019.05.036