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Coherent pion production off nuclei at T2K and MiniBooNE energies revisited

AuthorsNieves, Juan Miguel ; Hernández, Eliecer; Valverde, M.
Issue Date14-Oct-2010
PublisherAmerican Physical Society
CitationPhysical Review - Section D - Particles and Fields 82 (7): 077303 (2010)
AbstractAs 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 reevaluate our model predictions in [Phys. Rev. D 79, 013002 ( 2009)] for different observables of the latter reaction. Central values for the total cross sections increase by 20%-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(CCcoh pi(+))/sigma(NCcoh pi(0)) ratio by the SciBooNE Collaboration and the theoretical predictions.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevD.82.077303
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