Effective spectral function for quasielastic scattering on nuclei

Bodek, A.; Christy, M. E.; Coopersmith, B.

doi:10.1140/epjc/s10052-014-3091-0

Cited by 30 publications

(47 citation statements)

References 19 publications

(55 reference statements)

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“…These were not needed in the models designed to describe bubble-chamber data on deuterium targets. Various different implementations of such nuclear effects have been proposed [20][21][22][23][24][25][26][27][28][29][30]. In experimental measurements the effects of nucleon and hadron initial and final state interactions with the nucleus cannot typically be disentangled from the fundamental neutrino-interaction cross section.…”

Section: Introductionmentioning

confidence: 99%

Measurement of double-differential muon neutrino charged-current interactions onC8H8without pions in the final state using the

Abe¹,

Andreopoulos²,

Antonova³

et al. 2016

Phys. Rev. D

118

144

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We report the measurement of muon neutrino charged-current interactions on carbon without pions in the final state at the T2K beam energy using 5.734 × 10 20 protons on target. For the first time the measurement is reported as a flux-integrated, double-differential cross section in muon kinematic variables (cos θ μ , p μ ), without correcting for events where a pion is produced and then absorbed by final state interactions. Two analyses are performed with different selections, background evaluations and cross-section extraction methods to demonstrate the robustness of the results against biases due to model-dependent assumptions. The measurements compare favorably with recent models which include nucleon-nucleon correlations but, given the present precision, the measurement does not distinguish among the available models. The data also agree with Monte Carlo simulations which use effective parameters that are tuned to external data to describe the nuclear effects. The total cross section in the full phase space is σ ¼ ð0.417 AE 0.047ðsystÞ AE 0.005ðstatÞÞ × 10 −38 cm 2 nucleon −1 and the cross section integrated in the region of phase space with largest efficiency and best signal-over-background ratio (cos θ μ > 0.6 and p μ > 200 MeV) is σ ¼ ð0.202 AE 0.036ðsystÞ AE 0.003ðstatÞÞ × 10 −38 cm 2 nucleon −1 .

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Section: Introductionmentioning

confidence: 99%

Measurement of double-differential muon neutrino charged-current interactions onC8H8without pions in the final state using the

Abe¹,

Andreopoulos²,

Antonova³

et al. 2016

Phys. Rev. D

118

144

View full text Add to dashboard Cite

show abstract

“…It is known that the transverse cross section is larger than the predictions of the independent nucleon model. While the transverse enhancement has primarily been attributed to multi-nucleon processes via meson-exchange currents and ∆ excitation [14], it should be noted that this enhancement can also be regarded partly as due to relativity.…”

Section: Introductionmentioning

confidence: 99%

Superscaling analysis of quasielastic electron scattering with relativistic effective mass

2017

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We provide a parametrization of a new phenomenological scaling function obtained from a chisquare fit to a selected set of (e,e') cross section data expanding a band centered around the quasielastic peak. We start from a re-analysis of quasielastic electron scattering from nuclear matter within the relativistic mean field model. The cross section depends on the relativistic effective mass of the nucleon, m * N , and it scales with respect to a new scaling variable, ψ * . This suggests a new superscaling approach with effective mass (SuSAM*) for predicting quasielastic cross sections within an uncertainty band. The model reproduces previously established results on the enhancement of the transverse response function as compared to the traditional relativistic Fermi gas.

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“…Therefore, it has not been implemented in neutrino MC generators. However, the predictions of the ψ superscaling model can be approximated with an effective spectral function [18] which has been implemented in genie. The momentum distribution of the effective spectral function for nucleons bound in 12 6 C is shown as the blue curve in Fig.…”

Section: Nucleon Momentum Distributionsmentioning

confidence: 99%

“…effective spectral functions [18] (P,N ) SM Table 2. Summary of the relationships between excitation energy E P,N x (used in genie), separation energy S P,N , missing (missing) energy E P,N m (used in spectral function measurements), removal energy P,N (used in the reconstruction of neutrino energy from muon kinematics only), the Smith-Moniz removal energy P,N SM (that should be used in old-neut) and the parameters x and x ν,ν (q3 + k) 2 ) which we use to include the effects of FSI in electron and neutrino/antineutrino scattering.…”

Section: Separation Energymentioning

confidence: 99%

Removal energies and final state interaction in lepton nucleus scattering

Bodek

Cai

2019

Eur. Phys. J. C

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We investigate the binding energy parameters that should be used in modeling electron and neutrino scattering from nucleons bound in a nucleus within the framework of the impulse approximation. We discuss the relation between binding energy, missing energy, removal energy ( ), spectral functions and shell model energy levels and extract updated removal energy parameters from ee p spectral function data. We address the difference in parameters for scattering from bound protons and neutrons. We also use inclusive e-A data to extract an empirical parameter UF SI ((q3 + k) 2 ) to account for the interaction of final state nucleons (FSI) with the optical potential of the nucleus. Similarly we use V ef f to account for the Coulomb potential of the nucleus. With three parameters , UF SI ((q3 + k) 2 ) and V ef f we can describe the energy of final state electrons for all available electron QE scattering data. The use of the updated parameters in neutrino Monte Carlo generators reduces the systematic uncertainty in the combined removal energy (with FSI corrections) from ± 20 MeV to ± 5 MeV.PACS. 13.60.Hb Total and inclusive cross sections (including deep-inelastic processes) -13.15.+g Neutrino interactions -13.60.-r Photon and charged-lepton interactions with hadrons

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Effective spectral function for quasielastic scattering on nuclei

Cited by 30 publications

References 19 publications

Measurement of double-differential muon neutrino charged-current interactions onC8H8without pions in the final state using the

Measurement of double-differential muon neutrino charged-current interactions onC8H8without pions in the final state using the

Superscaling analysis of quasielastic electron scattering with relativistic effective mass

Removal energies and final state interaction in lepton nucleus scattering

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