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The impact of nuclear effect modeling on the cross-section ratio $\nu_e/\nu_\mu$ and its impact for futrue measurements of CP violation / Dieminger, T (Zurich, ETH) ; Dolan, S (CERN) ; Sgalaberna, D (Zurich, ETH) ; Nikolakopoulos, A (Fermilab) ; Dealtry, T (Lancaster U.) ; Bolognesi, S (IRFU, Saclay) ; Pickering, L (Royal Holloway, U. of London) ; Rubbia, A (Zurich, ETH)
Long-baseline (LBL) neutrino oscillation experiments search for Charge-Parity (CP) violation in the leptonic sector by precisely measuring the $\nu_\mu\to\nu_e$ and $\overline{\nu}_\mu\to\overline{\nu}_e$ appearance probabilities.One of the dominant systematic uncertainties on the measurements of CP violation, comes from our modeling of the $\nu_e/\overline{\nu}_e$ cross-section ratio, which is subject to a range of uncertainties related to poorly-constrained nuclear physics processes.Whilst tight constraints on the $\nu_\mu/\overline{\nu}_\mu$ cross-section can be achieved using LBL experiment's near detector data, the lepton mass differences mean that the extrapolation to the $\nu_e/\overline{\nu}_e$ is not trivial.Currently running LBL experiments reach a sensitivity to exclude the CP conserving hypothesis of about three standard deviations for a relatively large range of $\delta_{CP}$ values, hence a more accurate evaluation of the $\nu_e/\overline{\nu}_e$ related uncertainties becomes increasingly crucial.Following up on work by Nikolakopoulos et al.~\cite{Nik}, we present the analysis from \cite{UncertaintiesOTDi}, quantifying the potential for miss-modelling of the $\nu_\mu/\nu_e, \ \overline{\nu}_\mu / \overline{\nu}_e$ and $\nu_e/\overline{\nu}_e$ cross sections due to nuclear effects as a model spread in the full kinematic phase space for CCQE interactions.This impact is then propagated to simulated experimental configurations based on the Hyper-K and ESS$\nu$SB experiments.Significant differences between the theoretical models are found, which largely lie in regions of phase space that contribute only a small portion of the flux integrated cross sections.Overall, a systematic uncertainty on the oscillated flux-averaged $\nu_e/\overline{\nu}_e$ cross section of $\sim 2$\% and $\sim4$\% is found for the simulated Hyper-K and ESS$\nu$SB experiments respectively..
FERMILAB-CONF-23-770-T.- 2023 - 6 p. - Published in : PoS EPS-HEP2023 (2024) 183 Fulltext: PDF;
In : 2023 European Physical Society Conference on High Energy Physics (EPS-HEP2023), Hamburg, Germany, 20 - 25 Aug 2023, pp.183

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From Inclusive to Semi-Inclusive One-Nucleon Knockout in Neutrino Event Generators / Nikolakopoulos, Alexis (Fermilab) ; Gardiner, Steven (Fermilab) ; Papadopoulou, Afroditi (Argonne) ; Dolan, Stephen (CERN) ; González-Jiménez, Raúl (Madrid U.)
In neutrino event generators, for models for neutrino and electron scattering only inclusive cross sections are implemented. When these models are used to describe a semi-inclusive cross section, the event generator attaches the hadron variables based on some assumptions. [...]
arXiv:2302.12182; FERMILAB-CONF-23-089-T.- 2023-07-13 - 6 p. - Published in : Phys. Sci. Forum 8 (2023) 10 Fulltext: FERMILAB-CONF-23-089-T - PDF; Publication - PDF; 2302.12182 - PDF; External link: Fermilab Library Server
In : 23rd International Workshop on Neutrinos from Accelerators (NuFact 2022), Snowbird, Salt Lake City, Utah, United States, 30 Jul - 6 Aug 2022, pp.10

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Uncertainties on the $\nu_{\mu}$/$\nu_{e}$, $\bar{\nu}_{\mu}$/$\bar{\nu}_{e}$ and $\nu_{e}$/$\bar{\nu}_{e}$ cross-section ratio from the modelling of nuclear effects and their impact on neutrino oscillation experiments / Dieminger, T. (Zurich, ETH) ; Dolan, S. (CERN) ; Sgalaberna, D. (Zurich, ETH) ; Nikolakopoulos, A. (Fermilab) ; Dealtry, T. (Lancaster U.) ; Bolognesi, S. (IRFU, Saclay) ; Pickering, L. (Royal Holloway, U. of London) ; Rubbia, A. (Zurich, ETH)
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 model spread within the full kinematic phase space for CCQE interactions. Its impact is then propagated to simulated experimental configurations based on the Hyper-K and ESS$\nu$SB experiments. [...]
arXiv:2301.08065; FERMILAB-PUB-23-011-T.- 2023-08-14 - 6 p. - Published in : Phys. Rev. D 108 (2023) L031301 Fulltext: 70d5a8bfaea1fb8763da149195385c33 - PDF; 2301.08065 - PDF; FERMILAB-PUB-23-011-T - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server

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CRPA predictions of neutrino-nucleus interactions / Jachowicz, Natalie Yvonne (speaker) (Ghent University (BE)) ; Nikolakopoulos, Alexis (speaker) (Ghent University)
2022 - 2477. Conferences & Workshops; Neutrino–Nucleus Interactions in the Standard Model and Beyond External links: Talk details; Event details In : Neutrino–Nucleus Interactions in the Standard Model and Beyond

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Implementation of the continuum random phase approximation model in the GENIE generator and an analysis of nuclear effects in low-energy transfer neutrino interactions / Dolan, S. (CERN) ; Nikolakopoulos, A. (Gent U.) ; Page, O. (Bristol U.) ; Gardiner, S. (Fermilab) ; Jachowicz, N. (Gent U.) ; Pandey, V. (Fermilab ; Florida U.)
We present the implementation and validation of the Hartree-Fock continuum random phase approximation (HF-CRPA) model in the GENIE neutrino-nucleus interaction event generator and a comparison of the subsequent predictions to experimental measurements of lepton kinematics from interactions with no mesons in the final state. These predictions are also compared to those of other models available in GENIE. [...]
arXiv:2110.14601; FERMILAB-PUB-21-511-ND-SCD-T.- 2022-10-01 - 14 p. - Published in : Phys. Rev. D 106 (2022) 073001 Fulltext: fermilab-pub-21-511-scd - PDF; 2110.14601 - PDF; Fulltext from Publisher: PDF; External link: Fermilab Library Server

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Mean field approach to reconstructed neutrino energy distributions in accelerator-based experiments / Nikolakopoulos, A. (Gent U.) ; Martini, M. (IRFU, SPhN, Saclay) ; Ericson, M. (Lyon, IPN ; CERN) ; Van Dessel, N. (Gent U.) ; González-Jiménez, R. (UCM, Madrid, Dept. Phys. ; Gent U.) ; Jachowicz, N. (Gent U.)
The reconstruction of the neutrino energy is crucial in oscillation experiments that use interactions with nuclei to detect the neutrino. The common reconstruction procedure is based on the kinematics of the final-state lepton. [...]
arXiv:1808.07520.- 2018-11-05 - 9 p. - Published in : Phys. Rev. C 98 (2018) 054603 Fulltext: PDF;

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Također vidi: slična imena autora
3	Nikolakopoulos, A.
2	Nikolakopoulos, Alexis
1	Nikolakopoulos, Athanasios N

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