Neutrino-induced coherent pion production
L. Alvarez-Ruso, L. S. Geng, S. Hirenzaki, M. J. Vicente Vacas, T., Leitner, U. Mosel
TL;DR
This paper models neutrino-induced coherent pion production, accounting for medium effects and pion distortion, revealing significant reductions in cross sections and modifications in pion energy distributions relevant for experiments like K2K and MiniBooNE.
Contribution
It introduces a comprehensive model including medium effects and pion distortion, providing new insights into cross section reductions and energy distribution modifications.
Findings
Strong reduction of cross section due to medium effects
Substantial modifications in pion energy distributions
Sensitivity to axial N-Delta coupling and neutral-current fractions
Abstract
We have investigated the neutrino induced coherent pion production reaction at the energies of interest for recent experiments like K2K and MiniBooNE. The model includes pion, nucleon and the Delta(1232) resonance. Medium effects in the production mechanism and the distortion of the pion wave function are taken into account. We find a strong reduction of the cross section due to these effects and also substantial modifications in the energy distributions of the final pion. The sensitivity of the results on the axial N-Delta coupling C5A(0) and the coherent fraction in neutral-current pi0 production are discussed.
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