arXiv subjects

M. Benitez Galan

Publications and source records attributed to M. Benitez Galan.

3 recordsLinked to original sources

arXiv2025

Neutrino-nucleon elastic scattering in presence of non-standard interactions: cross sections and nucleon polarizations

New physics beyond the Standard Model (SM) may appear in the form of non-standard neutrino interactions (NSI). We have studied neutral current (anti)neutrino-nucleon scattering in presence of NSI. We obtain that in this scenario, nucleon matrix elements depend not only on the isovector axial nucleon form factor but also on the isoscalar one. For the axial form factors we consequently rely on the quark flavor decomposition performed by QCD simulations in the lattice (LQCD). We have examined cross sections and polarization observables. For the current bounds on diagonal muon flavor NSI couplings we find substantial deviations from the SM predictions in cross sections and transverse polarizations of the outgoing nucleons. In view of the progress in the precision of LQCD determinations of nucleon properties, modern measurements of neutral current (anti)neutrino-nucleon scattering will be in the position to discover or significantly constrain NSI.

hep-ph↗

arXiv2024

Cabibbo suppressed hyperon production off nuclei induced by antineutrinos

In this work we study the production of $Σ$ and $Λ$ hyperons in strangeness changing $ΔS = -1$ charged current interactions of muon antineutrinos on nuclear targets. At the nucleon level, besides quasielastic scattering we consider the inelastic mechanism in which a pion is produced alongside the hyperon. Its relevance for antineutrinos with energies below 2 GeV is conveyed in integrated and differential cross sections. We observe that the distributions on the angle between the hyperon and the final lepton are clearly different for quasielastic and inelastic processes. Hyperon final state interactions, modeled with an intranuclear cascade, lead to a significant transfer from primary produced $Σ$'s into final $Λ$'s. They also cause considerable energy loss, which is apparent in hyperon energy distributions. We have investigated $Λ$ production off ${}^{40}$Ar in the conditions of the recently reported MicroBooNE measurement. We find that the $Λπ$ contribution, dominated by $Σ^*(1385)$ excitation, accounts for about one third of the cross section.

hep-ph↗

arXiv2021

Cabibbo suppressed single pion production off the nucleon induced by antineutrinos

In this work we study the $Σπ$ and $Λπ$ production off free nucleons driven by the strangeness-changing weak charged current. We calculate the total cross sections for all possible channels and estimate the flux-averaged total cross sections for experiments like MiniBooNE, SciBooNE, T2K, and Minerva. The model is based on the lowest order effective SU(3) chiral Lagrangians in the presence of an external weak charged current and contains Born and the lowest-lying decuplet resonant mechanisms that can contribute to these reaction channels. We also compare and discuss our results with others following similar and very different approaches.

hep-ph↗