$Q^2$-dependence of backward pion multiplicity in neutrino-nucleus interactions

Abstract

The production of pions emitted backward in inelastic neutrino-nucleus interactions is analyzed within the impulse approximation in the framework of the dual parton model. We focus on the $Q^2$-dependence of the multiplicity of negative pions, normalized to the total cross section of the reaction $\nu +A\to \mu +X$. The inclusion of planar (one-Reggeon exchange) and cylindrical (one-Pomeron exchange) graphs leads to a multiplicity that decreases as $Q^2$ increases, in agreement with recent measurements carried out at CERN by the NOMAD collaboration. A realistic treatment of the high momentum tail of the nucleon distribution in a nucleus also allows for a satisfactory description of the semi-inclusive spectrum of backward pions.

15 pages, 4 figures

References in corpus (1)

• A study of backward going $p$ and ${\pi }^{-}$ in ${\nu }_{\mu }CC$ interactions with the NOMAD detector

Cited by in corpus (2)

• Hadron Multiplicity in Semi-Inclusive Lepton-Nucleon and Lepton-Nucleus Scattering
• Hadron Multiplicity in Lepton-Nucleon Interactions