Resonance production by neutrinos:<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi><mml:mo>=</mml:mo><mml:mn>3</mml:mn><mml:mo>/</mml:mo><mml:mn>2</mml:mn></mml:math>resonances

Lalakulich, O.; Paschos, E. A.

doi:10.1103/physrevd.71.074003

Cited by 107 publications

(164 citation statements)

References 25 publications

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“…[21,22]. It clearly appears that the different models describe the data in the region of the ∆ peak with comparable accuracy.…”

mentioning

confidence: 71%

“…The distinctive behavior exhibited by the predictions of the model of Refs. [21,22], at both lower and higher energy show the results of calculations carried out using the structure fumctions of Ref. [11], while the dashed and dot-dash lines in the upper panel have been obtained using the proton structure functions of Refs.…”

mentioning

confidence: 99%

“…[11], while the dashed and dot-dash lines in the upper panel have been obtained using the proton structure functions of Refs. [19,20] and [21,22], respectively. The dashed lines labelled n and p in the lower panel correspond to the neutron and proton contributions to the deuteron cross section, respectively.…”

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confidence: 99%

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Estimates of the Uncertainties Associated with Models of the Nucleon Structure Functions in theΔProduction Region

Benhar

Meloni

2006

Phys. Rev. Lett.

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Theoretical studies of the inclusive electron-nucleus cross section at beam energies up to few GeV show that, while the region of the quasi-elastic peak is understood at quantitative level, the data in the ∆ production region are sizably underestimated. We analize the uncertainty associated with the description of the nucleon structure functions W1 and W2 and its impact on the nuclear cross section. The results of our study suggest that the failure to reproduce the data is to be mostly ascribed to the poor knowledge of the neutron structure functions at low Q 2 .

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“…[21,22]. It clearly appears that the different models describe the data in the region of the ∆ peak with comparable accuracy.…”

mentioning

confidence: 71%

mentioning

confidence: 99%

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Estimates of the Uncertainties Associated with Models of the Nucleon Structure Functions in theΔProduction Region

Benhar

Meloni

2006

Phys. Rev. Lett.

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“…Assuming, as proposed in Ref. [29], the q 2 dependence [24,30]. On the other hand, the C A 5 (0) value is some 30% smaller than the prediction obtained from the off diagonal Goldberger-Treiman relation (GTR) that gives…”

Section: Introductionmentioning

confidence: 85%

Coherent pion production off nuclei at T2K and MiniBooNE energies revisited

2010

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As a result of a new improved fit to old bubble chamber data of the dominant axial C A 5 nucleonto-Delta form factor, and due to the relevance of this form factor for neutrino induced coherent pion production, we re-evaluate our model predictions in Phys. Rev. D 79, 013002 (2009) for different observables of the latter reaction. Central values for the total cross sections increase by 20%∼30%, while differential cross sections do not change their shape appreciably. Furthermore, we also compute the uncertainties on total, differential and flux averaged cross sections induced by the errors in the determination of C A 5 . Our new results turn out to be compatible within about 1σ with the former ones. Finally, we stress the existing tension between the recent experimental determination of the σ(CCcohπ + ) σ(NCcohπ 0 ) ratio by the SciBooNE Collaboration and the theoretical predictions.

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“…[34] for the electron analogue eN → e ′ N ′ π reaction. Most previous studies [35,36,37,38,39,40,41,42,43] of these processes considered only the dominant ∆ pole mechanism in which the neutrino excites a ∆(1232) resonance that subsequently decays into N π. In our model we have also included background terms required by chiral symmetry (See Fig.…”

Section: Introductionmentioning

confidence: 99%

Theoretical study of neutrino-induced coherent pion production off nuclei at T2K and MiniBooNE energies

Hernández²,

et al. 2009

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We have developed a model for neutrino-induced coherent pion production off nuclei in the energy regime of interest for present and forthcoming neutrino oscillation experiments. It is based on a microscopic model for pion production off the nucleon that, besides the dominant ∆ pole contribution, takes into account the effect of background terms required by chiral symmetry. Moreover, the model uses a reduced nucleon-to-∆ resonance axial coupling, which leads to coherent pion production cross sections around a factor two smaller than most of the previous theoretical estimates. In the coherent production, the main nuclear effects, namely medium corrections on the ∆ propagator and the final pion distortion, are included. We have improved on previous similar models by taking into account the nucleon motion and employing a more sophisticated optical potential. As found in previous calculations the modification of the ∆ self-energy inside the nuclear medium strongly reduces the cross section, while the final pion distortion mainly shifts the peak position to lower pion energies. The angular distribution profiles are not much affected by nuclear effects. Nucleon motion increases the cross section by ∼ 15% at neutrino energies of 650 MeV, while Coulomb effects on charged pions are estimated to be small. Finally, we discuss at length the deficiencies of the Rein-Sehgal pion coherent production model for neutrino energies below 2 GeV, and in particular for the MiniBooNE and T2K experiments. We also predict flux averaged cross sections for these two latter experiments and K2K.

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Resonance production by neutrinos:J=3/2resonances

Cited by 107 publications

References 25 publications

Estimates of the Uncertainties Associated with Models of the Nucleon Structure Functions in theΔProduction Region

Estimates of the Uncertainties Associated with Models of the Nucleon Structure Functions in theΔProduction Region

Coherent pion production off nuclei at T2K and MiniBooNE energies revisited

Theoretical study of neutrino-induced coherent pion production off nuclei at T2K and MiniBooNE energies

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