Uncertainties on the νμ\nu_{\mu}/νe\nu_{e}, νˉμ\bar{\nu}_{\mu}/νˉe\bar{\nu}_{e} and νe\nu_{e}/νˉe\bar{\nu}_{e} cross-section ratio from the modelling of nuclear effects and their impact on neutrino oscillation experiments

Recent studies have demonstrated non-trivial behaviours in the cross-section extrapolation from $\nu_{\mu}$ ($\bar{\nu}_{\mu}$) to $\nu_{e}$ ($\bar{\nu}_{e}$) interactions on nuclear targets in the charged-current quasi-elastic (CCQE) regime. In this article, the potential for mis-modeling of $\nu_{\mu}$/$\nu_{e}$, $\bar{\nu}_{\mu}$/$\bar{\nu}_{e}$ and $\nu_{e}$/$\bar{\nu}_{e}$ cross-section ratios due to nuclear effects is quantified by considering the model spread within the full kinematic phase space for CCQE interactions. Its impact is then propagated to a simulated experimental configuration based on the Hyper-K experiment, which is dominated by CCQE interactions. Although a relatively large discrepancy between theoretical models is confirmed for forward lepton angles at neutrino energies below 300 MeV and for a new region of phase space at lepton angles above $100^{\circ}$, both regions are demonstrated to contribute a very small portion of the Hyper-K (or T2K) flux integrated cross section. Overall, a systematic uncertainty on the oscillated flux-averaged $\nu_{e}$/$\bar{\nu}_{e}$ cross-section ratio is estimated to be $\sim$2%. A similar study was also conducted for the proposed lower-energy ESS$\nu$SB experiment configuration, where the resulting uncertainty was found to be larger.Comment: 14 pages, 10 figures. Fixed abstract misformating on arxiv pag

Uncertainties on the ν (-) e/ ν (-) μ and νe/ ν ¯ e cross-section ratio from the modeling of nuclear effects at 0.2 to 1.2 GeV neutrino energies and their impact on neutrino oscillation experiments

The potential for mismodeling of νμ/νe, ν¯μ/ν¯e, and νe/ν¯e cross-section ratios due to nuclear effects is quantified by considering model spread within the full kinematic phase space for charged-current quasielastic interactions. Its impact is then propagated to simulated experimental configurations based on the Hyper-K and ESSνSB experiments. Although significant discrepancies between theoretical models is confirmed, it is found that these largely lie in regions of phase space that contribute only a very small portion of the flux-integrated cross sections. Overall, a systematic uncertainty on the oscillated flux-averaged νe/ν¯e cross-section ratio is found to be ∼2 and ∼4% for Hyper-K and ESSνSB, respectively.ISSN:1550-7998ISSN:0556-2821ISSN:1550-236

Uncertainties on the (−)nue/(−)numu(-)nu_e/(-)nu_mu and nue/nuenu_e/nu_e cross-section ratio from the modeling of nuclear effects at 0.2 to 1.2 GeV neutrino energies and their impact on neutrino oscillation experiments

The potential for mismodeling of νμ/νe, ¯νμ/¯νe, and νe/¯νe cross-section ratios due to nuclear effects is quantified by considering model spread within the full kinematic phase space for charged-current quasielastic interactions. Its impact is then propagated to simulated experimental configurations based on the Hyper-K and ESSνSB experiments. Although significant discrepancies between theoretical models is confirmed, it is found that these largely lie in regions of phase space that contribute only a very small portion of the flux-integrated cross sections. Overall, a systematic uncertainty on the oscillated flux-averaged νe/¯νe cross-section ratio is found to be ∼2 and ∼4% for Hyper-K and ESSνSB, respectively

Uncertainties on the νμ\nu_{\mu}/νe\nu_{e}, νˉμ\bar{\nu}_{\mu}/νˉe\bar{\nu}_{e} and νe\nu_{e}/νˉe\bar{\nu}_{e} cross-section ratio from the modelling of nuclear effects and their impact on neutrino oscillation experiments

International audienceRecent studies have demonstrated non-trivial behaviours in the cross-section extrapolation from $\nu_{\mu}$ ($\bar{\nu}_{\mu}$) to $\nu_{e}$ ($\bar{\nu}_{e}$) interactions on nuclear targets in the charged-current quasi-elastic (CCQE) regime. In this article, the potential for mis-modeling of $\nu_{\mu}$/$\nu_{e}$, $\bar{\nu}_{\mu}$/$\bar{\nu}_{e}$ and $\nu_{e}$/$\bar{\nu}_{e}$ cross-section ratios due to nuclear effects is quantified by considering the model spread within the full kinematic phase space for CCQE interactions. Its impact is then propagated to a simulated experimental configuration based on the Hyper-K experiment, which is dominated by CCQE interactions. Although a relatively large discrepancy between theoretical models is confirmed for forward lepton angles at neutrino energies below 300 MeV and for a new region of phase space at lepton angles above $100^{\circ}$, both regions are demonstrated to contribute a very small portion of the Hyper-K (or T2K) flux integrated cross section. Overall, a systematic uncertainty on the oscillated flux-averaged $\nu_{e}$/$\bar{\nu}_{e}$ cross-section ratio is estimated to be $\sim$2%. A similar study was also conducted for the proposed lower-energy ESS$\nu$SB experiment configuration, where the resulting uncertainty was found to be larger