Neutrino-induced coherent pion production off nuclei
T. Leitner, U. Mosel, S. Winkelmann
TL;DR
This paper critically examines the local approximation used in theoretical models of neutrino-induced coherent pion production, revealing it overestimates production rates by up to 100%, thus questioning its validity.
Contribution
It provides a detailed analysis of the local approximation's validity, highlighting significant overestimations in current theoretical estimates.
Findings
Local approximation overestimates production by up to 100%
Validity of the local approximation is questionable
Implications for neutrino-nucleus interaction models
Abstract
All available theoretical estimates of neutrino-induced coherent pion production rely on the 'local approximation' for the Delta propagator. The validity of this approximation is scrutinized. It is found that the local approximation overestimates the neutrino-induced coherent pion production on nuclei significantly, by up to 100%.
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