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arXiv · 2509.08786

Two-particle two-hole excitations in semi-inclusive neutrino-nucleus scattering

Valerio Belocchi·Maria Benedetta Barbaro·Arturo De Pace·Marco Martini
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Abstract

A calculation of the two-particle two-hole contribution to the semi-inclusive $(\nu_\mu,\mu^-N)$ cross section on carbon is performed in the framework of the relativistic Fermi gas model. The process is driven by meson-exchange currents encompassing all contributions involving the exchange of a single pion and the excitation of a $\Delta$ resonance. The calculation is validated against the inclusive $(\nu_\mu,\mu^-)$ response functions already existing in the literature, and then extended for the first time to the semi-inclusive channel. Results are presented both at fixed neutrino energy and folded with the T2K neutrino flux.

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Valerio Belocchi, Maria Benedetta Barbaro, Arturo De Pace, Marco Martini. 2025-09-10. Two-particle two-hole excitations in semi-inclusive neutrino-nucleus scattering. https://arxiv.org/abs/2509.08786

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