Relativistic description of final-state interactions in neutral-current neutrino and antineutrino cross sections

González-Jiménez, R.; Caballero, J. A.; Meucci, Andrea; Giusti, C.; Bárbaro, M. B.; Ivanov, M. V.; Udı́as, J. M.

doi:10.1103/physrevc.88.025502

Cited by 30 publications

(54 citation statements)

References 91 publications

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“…[47], the larger cross sections in the RGF may be associated with the redistribution of the strength arising from reaction mechanisms other than single nucleon knockout, such as rescattering of the outgoing nucleon-possibly leading to the excitation of nonnucleonic degrees of freedom-or scattering off a nucleon belonging to a correlated pair. These channels, although not explicitly included in the RGF, may be phenomenologically taken into account by the imaginary part of the optical potential.…”

Section: Resultsmentioning

confidence: 99%

Estimate of the theoretical uncertainty of the cross sections for nucleon knockout in neutral-current neutrino-oxygen interactions

Ankowski¹,

Bárbaro²,

Benhar³

et al. 2015

Phys. Rev. C

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Free nucleons propagating in water are known to produce γ rays, which form a background to the searches for diffuse supernova neutrinos and sterile neutrinos carried out with Cherenkov detectors. As a consequence, the process of nucleon knockout induced by neutral-current quasielastic interactions of atmospheric (anti)neutrinos with oxygen needs to be under control at the quantitative level in the background simulations of the ongoing and future experiments. In this paper, we provide a quantitative assessment of the uncertainty associated with the theoretical description of the nuclear cross sections, estimating it from the discrepancies between the predictions of different models.

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Section: Resultsmentioning

confidence: 99%

Estimate of the theoretical uncertainty of the cross sections for nucleon knockout in neutral-current neutrino-oxygen interactions

Ankowski¹,

Bárbaro²,

Benhar³

et al. 2015

Phys. Rev. C

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“…It was pointed out in [53] that the multinucleon contribution may effectively be accounted for by increasing the value of the axial mass. As shown in [54] and [59][60][61], the RMF approach gives a good description of the shape of the double-differential cross section from the MiniBooNE experiment but fails to reproduce its normalization. It has been noted in [54] that meson exchange currents (MEC) could reduce the discrepancy.…”

Section: Introductionmentioning

confidence: 99%

“…It has been noted in [54] that meson exchange currents (MEC) could reduce the discrepancy. The calculations within the relativistic Green's function (RGF) model [49,62,63] have provided a good description of the total CCQE and of the (double-) differential (CCQE) NCQE MiniBooNE cross sections [49,55,61,62,64]. The larger RGF cross sections can be attributed to the overall effect of inelastic channels, for instance, rescattering of the knockedout nucleon, multinucleon processes, and non-nucleonic excitation, that are recovered in the model by the use of a complex relativistic optical potential to describe FSIs and that are not included in other models based on the impulse approximation.…”

Section: Introductionmentioning

confidence: 99%

Neutral current quasielastic (anti)neutrino scattering beyond the Fermi gas model at MiniBooNE and BNL kinematics

et al. 2015

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Neutral current quasielastic (anti)neutrino scattering cross sections on a 12 C target are analyzed using a realistic spectral function S(p,E) that gives a scaling function in accordance with the (e,e ) scattering data. The spectral function accounts for the nucleon-nucleon (NN) correlations by using natural orbitals from the Jastrow correlation method and has a realistic energy dependence. The standard value of the axial mass M A = 1.032 GeV is used in all calculations. The effect of the final-state interaction on the spectral and scaling functions, as well as on the cross sections, is accounted for. A comparison of the calculations with the empirical data of the MiniBooNE and BNL experiments is performed. Our results are analyzed in comparison with those when NN correlations are not included and, also, with results from other theoretical approaches, such as the relativistic Fermi gas, the relativistic mean field, and the relativistic Green's function, as well as with the SuperScaling Approach based on the analysis of quasielastic electron scattering.

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“…The strange form factors of the nucleon have recently been studied using the parity-violating electron scattering asymmetry [98][99][100][101][102][103] and the proton-to-neutron ratio in WNC neutrino-nucleus quasielastic interaction [104,105]. A general conclusion from these works is that we are still far from a precise determination of the strange form factor of the nucleon.…”

Section: Discussionmentioning

confidence: 99%

Electroweak single-pion production off the nucleon: From threshold to high invariant masses

et al. 2017

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Background: Neutrino-induced single-pion production (SPP) provides an important contribution to neutrino-nucleus interactions, ranging from intermediate to high energies. There exists a good number of low-energy models in the literature to describe the neutrinoproduction of pions in the region around the Delta resonance. Those models consider only lowest-order interaction terms and, therefore, fail in the high-energy region (pion-nucleon invariant masses, W 2 GeV).Purpose: Our goal is to develop a model for electroweak SPP off the nucleon, which is applicable to the entire energy range of interest for present and future accelerator-based neutrino-oscillation experiments.Method: We start with the low-energy model of Ref.[1], which includes resonant contributions and background terms derived from the pion-nucleon Lagrangian of chiral-perturbation theory [2]. Then, from the background contributions, we build a high-energy model using a Regge approach. The low-and highenergy models are combined, in a phenomenological way, into a hybrid model. Results:The Hybrid model is identical to the low-energy model in the low-W region, but, for W > 2 GeV, it implements the desired high-energy behavior dictated by Regge theory. We have tested the high-energy model by comparing with one-pion production data from electron and neutrino reactions. The Hybrid model is compared with electron-proton scattering data, with neutrino SPP data and with the predictions of the NuWro Monte Carlo event generator. Conclusions: Our model is able to provide satisfactory predictions of the electroweak one-pion production cross section from pion threshold to high W . Further investigation and more data are needed to better understand the mechanisms playing a role in the electroweak SPP process in the high-W region, in particular, those involving the axial current contributions.

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Relativistic description of final-state interactions in neutral-current neutrino and antineutrino cross sections

Cited by 30 publications

References 91 publications

Estimate of the theoretical uncertainty of the cross sections for nucleon knockout in neutral-current neutrino-oxygen interactions

Estimate of the theoretical uncertainty of the cross sections for nucleon knockout in neutral-current neutrino-oxygen interactions

Neutral current quasielastic (anti)neutrino scattering beyond the Fermi gas model at MiniBooNE and BNL kinematics

Electroweak single-pion production off the nucleon: From threshold to high invariant masses

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