2007/10/31 by E. Hernandez, E. Hernández, J. Nieves +5
Physics and Astronomy · #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.77.053009
published as Phys.Rev.D77:053009,2008 · This version corrects a mistake on the helicity amplitudes sign. Additional comments on resonance-background relative sign are added. Other minor corrections. Matches published version. 17 pages, 7 figures
openalex publication_date 2008/03/17 · arxiv created 2008/03/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04
We study the threshold production of two pions induced by neutrinos in nucleon targets. The contribution of nucleon, pion, and contact terms are calculated using a chiral Lagrangian. The contribution of the Roper resonance, neglected in earlier studies, has also been taken into account. The numerical results for the cross sections are presented and compared with the available experimental data. It has been found that in the two-pion channels with \ensuremathπ+\ensuremathπ^\ensuremath- and \ensuremathπ0\ensuremathπ0 in the final state, the contribution of the N*(1440) is quite important and could be used to determine the N*(1440) electroweak transition form factors if experimental data with better statistics become available in the future.