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

O. Benhar·S. Fantoni·G. I. Lykasov·U. Sukhatme
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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 $ν+ A \to μ+ X$. 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.

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O. Benhar, S. Fantoni, G. I. Lykasov, U. Sukhatme. 2001-12-18. $Q^2$-dependence of backward pion multiplicity in neutrino-nucleus interactions. https://doi.org/10.1016/s0370-2693(02)01164-4

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