A study of the double hadron neutrino production on nuclei

Abstract

The nuclear medium influence on the dihadron neutrinoproduction is investigated for the first time, using the data obtained with SKAT bubble chamber. An indication is obtained that the nuclear attenuation of the dihadron is more expressed for kinematically closest hadron pairs. The experimental data on the dihadron attenuation and on the ratio of the dihadron to single-hadron yields are compared with predictions of the two-scale string fragmentation model.

Nuclear attenuation of three-hadron systems in neutrino-induced reactions

“…As it was shown in [6], a reasonable agreement with the data on the twohadron neutrinoproduction can be reached at the following set of the model parameters: κ = 0.8 GeV/fm. σ q = 0, σ s = 10 mb and σ h = 20 mb.…”

“…We undertook an attempt to describe our data in the framework of the Two-Scale Model (TSM) [15] (see also [4] and references therein) which was already applied for description of our data on the nuclear attenuation of neutrinoproduced two-hadron systems [6]. The details of the TSM application to three-hadron systems can be found in [16].…”

“…At present the experimental data on the double hadron production are available in electronuclear [5] and neutrinonuclear [6] interactions. This work is devoted to the study, for the first time, of the nuclear effects in the neutrinoproduction of more complex, three hadron systems.…”

Study of nuclear effects in the inclusive neutrinoproduction of the δ^{++}(1232) isobar

“…The subsample B N includes the events without any indication of the nuclear disintegration or a secondary intranuclear interaction, satisfying the following topological and kinematic criteria: the net charge of secondary hadrons was equal to +1 (for quasineutron subsample B n ) or +2 (for quasiproton subsample B p ); the number of recorded baryons (these included identified protons and Λ hyperons, along with neutrons that suffered a secondary interaction in the chamber) was forbidden to exceed unity, baryons flying in the backward hemisphere being required to be absent among them; the effective target mass M t < 1.2 GeV/c 2 , the M t being defined as M t = (E i − p L i ) where the summation was performed over the energies E i and the longitudinal momenta p L i (along the neutrino direction) of all recorded secondary particles. As it was shown in detail in [7,8], the multiplicity and spectral characteristics of charged hadrons in the B p and B n subsamples were quite compatible with the available data obtained on hydrogen and deuterium targets.…”

Measurement of νμ charged-current single π0 production on hydrocarbon in the few-GeV region using MINERvA

“…The differences in modeling approaches used by the GENIE and NuWro neutrino generators provide some perspectives. Alteration of Fermi-motion modeling and inclusion of in-medium modification of the ∆(232) resonance [82], may generate offsets of ∼ 5 MeV. A shift of similar magnitude may also arise from constructive interference between the ∆ and nonresonant pion production amplitudes [16].…”