Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-07-21
Phys.Rev.D82:077303,2010
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 latex pages, 1 table, 2 figures. Shortened version
Scientific paper
10.1103/PhysRevD.82.077303
As a result of a new improved fit to old bubble chamber data of the dominant axial C_5^A nucleon-to-Delta form factor, and due to the relevance of this form factor for neutrino induced coherent pion production, we re-evaluate our model predictions in Phys. Rev. D79, 013002 (2009) for different observables of the latter reaction. Central values for the total cross sections increase by 20% to 30%, while differential cross sections do not change their shape appreciably. Furthermore, we also compute the uncertainties on total, differential and flux averaged cross sections induced by the errors in the determination of C_5^A. Our new results turn out to be compatible within about 1 sigma with the former ones. Finally, we stress the existing tension between the recent experimental determination of the sigma(CC coh \pi^+)/sigma(NC coh \pi^0) ratio by the SciBooNE Collaboration and the theoretical predictions.
Hernandez Eduardo
Nieves Juan
Valverde M.
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