Relativistic effects in two-particle emission for electron and neutrino reactions

Simó, I. Ruiz; Albertus, C.; Amaro, J. E.; Bárbaro, M. B.; Caballero, J. A.; Donnelly, T. W.

doi:10.1103/physrevd.90.033012

Cited by 41 publications

(68 citation statements)

References 41 publications

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“…Our integration algorithm presents a number of advantages with respect to the standard deterministic methods usually employed in the calculation of the nuclear response function. For instance, we neither employ the so-called "frozen approximation" -amounting to neglect the momenta of the two initial nucleons [78] -nor we need to parametrize the response functions before computing the double-differential and total cross sections [79,80].…”

Section: Numerical Implementationmentioning

confidence: 99%

Neutrino-nucleus cross section within the extended factorization scheme

et al. 2019

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The factorization scheme, based on the impulse approximation and the spectral function formalism, has been recently generalized to allow the description of electromagnetic nuclear interactions driven by two-nucleon currents. We have extended this framework to the case of weak charged and neutral currents, and carried out calculations of the double-differential neutrino-carbon and neutrino-oxygen cross sections using two different models of the target spectral functions. The results, showing a moderate dependence on the input spectral function, confirm that our approach provides a consistent treatment of all reaction mechanisms contributing to the signals detected by accelerator-based neutrino experiments.

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Section: Numerical Implementationmentioning

confidence: 99%

Neutrino-nucleus cross section within the extended factorization scheme

et al. 2019

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“…The first difficulty is that one needs to perform these 7-dimensional integrals for a huge number of 2p-2h response Feynman diagrams. Second, divergences in the NN correlations sector and in the angular distribution of the ejected nucleons [222,223] may appear and need to be regularized. Furthermore, as illustrated in Sec.…”

Section: Np-nh Excitations: Theory Vs Experimental Dσmentioning

confidence: 99%

Neutrino–nucleus cross sections for oscillation experiments

Katori¹,

Martini²

2017

J. Phys. G: Nucl. Part. Phys.

151

190

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Abstract. Neutrino oscillations physics is entered in the precision era. In this context accelerator-based neutrino experiments need a reduction of systematic errors to the level of a few percent. Today one of the most important sources of systematic errors are neutrinonucleus cross sections which in the hundreds-MeV to few-GeV energy region are known with a precision not exceeding 20%. In this article we review the present experimental and theoretical knowledge of the neutrino-nucleus interaction physics. After introducing neutrino oscillation physics and accelerator-based neutrino experiments, we overview general aspects of the neutrino-nucleus cross sections, both theoretical and experimental views. Then, we focus on these quantities in different reaction channels. We start with the quasielastic and quasielastic-like cross section, putting a special emphasis on multinucleon emission channel which attracted a lot of attention in the last few years. We review the main aspects of the different microscopic models for this channel by discussing analogies and differences among them. The discussion is always driven by a comparison with the experimental data. We then consider the one pion production channel where data-theory agreement remains very unsatisfactory. We describe how to interpret pion data, then we analyze in particular the puzzle related to the impossibility of theoretical models and Monte Carlo to simultaneously describe MiniBooNE and MINERvA experimental results. Inclusive cross sections are also discussed, as well as the comparison between the ν µ and ν e cross sections, relevant for the CP violation experiments. The impact of the nuclear effects on the reconstruction of neutrino energy and on the determination of the neutrino oscillation parameters is reviewed. A window to the future is finally opened by discussing projects and efforts in future detectors, beams, and analysis.

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“…With regard to FSI, these are included by introducing a time-independent optical potential that describes the interaction between the struck nucleon and the residual nucleus. Concerning the treatment of 2p-2h excitations, we follow our previous studies in [33][34][35] that present a microscopic calculation by including a fully relativistic model for the weak charged-current MEC in both longitudinal and transverse channels, and with vector and axial-vector contributions. The present model is applied to CC0π (anti)neutrino scattering processes on carbon measured by the MiniBooNE [36,37], NO-MAD [38], T2K [39] and MINERνA [40][41][42][43] experiments spanning an energy range from hundreds of MeV up to 100 GeV.…”

Section: Introductionmentioning

confidence: 99%

Realistic spectral function model for charged-current quasielastic-like neutrino and antineutrino scattering cross sections on C12

et al. 2019

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A detailed study of charged current quasielastic neutrino and antineutrino scattering cross sections on a 12 C target with no pions in the final state is presented. The initial nucleus is described by means of a realistic spectral function S(p, E) in which nucleon-nucleon correlations are implemented by using natural orbitals through the Jastrow method. The roles played by these correlations and by final-state interactions are analyzed and discussed. The model also includes the contribution of weak two-body currents in the two-particle two-hole sector, evaluated within a fully relativistic Fermi gas. The theoretical predictions are compared with a large set of experimental data for double-differential, single-differential and total integrated cross sections measured by the Mini-BooNE, MINERνA and T2K experiments. Good agreement with experimental data is found over the whole range of neutrino energies. The results are also in global good agreement with the predictions of the superscaling approach, which is based on the analysis of electron-nucleus scattering data, with only a few differences seen at specific kinematics.

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Relativistic effects in two-particle emission for electron and neutrino reactions

Cited by 41 publications

References 41 publications

Neutrino-nucleus cross section within the extended factorization scheme

Neutrino-nucleus cross section within the extended factorization scheme

Neutrino–nucleus cross sections for oscillation experiments

Realistic spectral function model for charged-current quasielastic-like neutrino and antineutrino scattering cross sections on C12

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