Quasielastic production of polarized hyperons in antineutrino--nucleon reactions

Abstract

We have studied the differential cross section as well as the longitudinal and perpendicular components of polarization of final hyperon($\Lambda$,$\Sigma$) produced in the antineutrino induced quasielastic charged current reactions on nucleon and nuclear targets. The nucleon-hyperon transition form factors are determined from the experimental data on quasielastic $(\Delta S=0)$ charged current (anti)neutrino--nucleon scattering and the semileptonic decay of neutron and hyperons assuming G--invariance, T--invariance and SU(3) symmetry. The vector transition form factors are obtained in terms of nucleon electromagnetic form factors for which various parameterizations available in literature have been used. A dipole parameterization for the axial vector form factor and the pseudoscalar transition form factor derived in terms of axial vector form factor assuming PCAC and GT relation extended to strangeness sector have been used in numerical evaluations. The flux averaged cross section and polarization observables corresponding to CERN Gargamelle experiment have been calculated for quasielastic hyperon production and found to be in reasonable agreement with the experimental observations. The numerical results for the flux averaged differential cross section$\frac{d\sigma }{d{Q}^2}$ and longitudinal(perpendicular) polarization $P_L(Q^2)(P_P(Q^2))$ relevant for the antineutrino fluxes of MINER$\nu$A, MicroBooNE, and T2K experiments have been presented. This will be useful in interpreting future experimental results on production cross sections and polarization observables from the experiments on the quasielastic production of hyperons induced by antineutrinos and explore the possibility of determining the axial vector and pseudoscalar form factors in the strangeness sector.

23 Pages, 23 Figures

References in corpus (8)

• First Measurement of the Muon Neutrino Charged Current Quasielastic Double Differential Cross Section
• Measurements of neutrino oscillation in appearance and disappearance channels by the T2K experiment with 6.6E20 protons on target
• A study of quasi-elastic muon neutrino and antineutrino scattering in the NOMAD experiment
• Progress and open questions in the physics of neutrino cross sections
• Electromagnetic form factors of the nucleon: new fit and analysis of uncertainties
• Dual baseline search for muon antineutrino disappearance at 0.1 eV^2 < Δm^2 < 100 eV^2
• Study of quasielastic scattering using charged-current nu_mu-iron interactions in the MINOS Near Detector
• Weak Quasi-elastic Production of Hyperons

Cited by in corpus (5)

• Polarization Transfer in Weak Pion Production off the Nucleon
• Spin asymmetry in single pion production induced by weak interactions of neutrinos with polarized nucleons
• ${\bar{\nu }}_{\mu }$ induced quasielastic production of hyperons leading to pions
• Status and Perspectives of Neutrino Physics
• Neutrino-nucleon elastic scattering in presence of non-standard interactions: cross sections and nucleon polarizations