The charged current antikaon production off nucleons induced by antineutrinos is studied at low and intermediate energies. We extend here our previous calculation on kaon production induced by neutrinos. We have developed a microscopic model that starts from the SU (3) chiral Lagrangians and includes background terms and the resonant mechanisms associated to the lowest lying resonance in the channel, namely, the Σ * (1385). Our results could be of interest for the background estimation of various neutrino oscillation experiments like MiniBooNE and SuperK. They can also be helpful for the plannedν−experiments like MINERνA, NOνA and T2K phase II and for beta-beam experiments with antineutrino energies around 1 GeV.

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In this work, we have studied (anti)neutrino induced charged current quasielastic scattering from some nuclear targets in the energy region of Eν < 1 GeV . Our aim is to confront electron and muon production cross sections relevant for νµ ↔ νe orνµ ↔νe oscillation experiments. The effects due to lepton mass and its kinematic implications, radiative corrections, second class currents and uncertainties in the axial and pseudoscalar form factors are calculated for (anti)neutrino induced reaction cross sections on free nucleon as well as the nucleons bound in a nucleus where nuclear medium effects influence the cross section. For the nuclear medium effects we have taken some versions of Fermi gas model(FGM) available in literature. The results for (anti)neutrino-nucleus scattering cross section per interacting nucleons are compared with the corresponding results in free nucleon case.

We have studied the differential cross section as well as the longitudinal and perpendicular components of polarization of final hyperon(Λ,Σ) 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 (∆S = 0) charged current (anti)neutrinonucleon 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 dσ dQ 2 and longitudinal(perpendicular) polarization PL(Q 2 )(PP (Q 2 )) relevant for the antineutrino fluxes of MINERνA, 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.

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We present a study of neutrino/antineutrino induced charged current (CC) and neutral current (NC) single pion production (SPP) off the nucleon. For this, we have considered [Formula: see text] resonance, nonresonant background (NRB) terms, other higher resonances like [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text]. For the NRB terms a microscopic approach based on [Formula: see text] nonlinear sigma model has been used. The vector form factors for the resonances are obtained by using the relationship between the electromagnetic resonance form factors and helicity amplitudes provided by MAID. Axial coupling [Formula: see text] in the case of [Formula: see text] resonance is obtained by fitting the ANL and BNL [Formula: see text]-deuteron reanalyzed scattering data. The results are presented with and without deuteron effect for the total scattering cross-sections for all possible channels, viz. [Formula: see text] and [Formula: see text], where [Formula: see text], [Formula: see text] or [Formula: see text] and [Formula: see text].

We have studied quasielastic charged current hyperon production induced byν µ on free nucleon and the nucleons bound inside the nucleus. The calculations are performed for several nuclear targets like 12 C, 40 Ar, 56 F e and 208 P b which are presently being used in various oscillation experiments using accelerator neutrinos. The inputs are the hyperon-nucleon transition form factors determined from neutrinonucleon scattering as well as from semileptonic decays of neutron and hyperons using SU(3) symmetry. The calculations for the nuclear targets are done in local density approximation. The nuclear medium effects(NME) due to Fermi motion, Pauli blocking and final state interaction(FSI) effects due to hyperon-nucleon scattering have been taken into account.

We study single kaon production off the nucleon induced by electrons (positrons) i.e. e − (e + ) + N → ν e (ν e ) +K(K) + N ′ at low energies. The possibility of observing these processes with the high luminosity beams available at TJNAF and Mainz is discussed, taking into account that the strangeness conserving electromagnetic reactions have a higher energy threshold forK(K) production. The calculations are done using a microscopic model that starts from the SU(3) chiral Lagrangians, includes background terms and the resonant mechanisms associated to the lowest lying resonance Σ * (1385).