Partially conserved axial vector current and coherent pion production by low energy neutrinos

Berger, Ch.; Sehgal, L.M.

doi:10.1103/physrevd.79.053003

Cited by 125 publications

(132 citation statements)

References 32 publications

(29 reference statements)

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“…Based on previous measurements of CC coherent π + production [42], they conclude that σ(CCcohπ + ) σ(NCcohπ 0 ) SciBooNE = 0.14 +0.30 −0.28 . This result can not be accommodated within our model, or any other present theoretical model, neither microscopic [9][10][11]13] nor PCAC based [1,2,43,44]. Theoretically, this ratio cannot be much smaller than 1.4-1.6.…”

Section: New Resultscontrasting

confidence: 68%

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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Section: New Resultscontrasting

confidence: 68%

Coherent pion production off nuclei at T2K and MiniBooNE energies revisited

2010

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“…By its nature, coherent scattering involves a very small fourmomentum transfer to the target nucleus and so its contribution is confined to very low Q 2 . Different models are commonly used; while NEUT and GENIE use different implementations of the Rein-Sehgal [31] model, NuWro uses the Berger-Sehgal [48] model. NEUT predicts a distinctly larger rate for coherent reaction (9) than does GENIE.…”

Section: Dσ/dq 2 Of Cc(π) Reactionsmentioning

confidence: 99%

Cross sections forνμandν¯μinduced pion production on hydrocarbon in the few-GeV region using MINERvA

McGivern¹,

Le²,

Eberly³

et al. 2016

Phys. Rev. D

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Cross sections for ν_{μ} and ν[over ¯]_{μ} induced pion production on hydrocarbon in the few-GeV region using MINERvA FERMILAB-PUB-16-228-NDCross sections for ν µ andν µ induced pion production on hydrocarbon in the few-GeV region using MINERvA Separate samples of charged-current pion production events representing two semi-inclusive channels νµ-CC(π + ) andνµ-CC(π 0 ) have been obtained using neutrino and antineutrino exposures of the MINERvA detector. Distributions in kinematic variables based upon µ ± -track reconstructions are analyzed and compared for the two samples. The differential cross sections for muon production angle, muon momentum, and four-momentum transfer Q 2 , are reported, and cross sections versus neutrino energy are obtained. Comparisons with predictions of current neutrino event generators are used to clarify the role of the ∆(1232) and higher-mass baryon resonances in CC pion production and to show the importance of pion final-state interactions. For the νµ-CC(π + ) (νµ-CC(π 0 )) sample, the absolute data rate is observed to lie below (above) the predictions of some of the event generators by amounts that are typically 1-to-2 σ. However the generators are able to reproduce the shapes of the differential cross sections for all kinematic variables of either data set.

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“…These authors utilize an improved description of the pion-nucleus interaction [44]. At low energies, elastic scattering is parameterized by partial waves.…”

Section: • Berger-sehgalmentioning

confidence: 99%