Measurement of the elastic π0 photoproduction cross sections on 12C and 13C

Gothe, R.; Lang, W.; Klein, S.S.; Schoch, B.; Metag, V.; Ströher, H.; Hall, S.J.; Owens, R.O.

doi:10.1016/0370-2693(95)00728-4

Cited by 12 publications

(9 citation statements)

References 20 publications

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“…7 also shows a comparison of our results with the experimental data of Ref. [17]. It is clear from the figure that the vector representation is closer to the data; note that the tensor calculation has been divided by a factor of five.…”

Section: B Resultssupporting

confidence: 59%

Lessons to be learned from the coherent photoproduction of pseudoscalar mesons

et al. 1999

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We study the coherent photoproduction of pseudoscalar mesons-particularly of neutral pions-placing special emphasis on the various sources that put into question earlier nonrelativistic-impulse-approximation calculations. These include: final-state interactions, relativistic effects, off-shell ambiguities, and violations to the impulse approximation. We establish that, while distortions play an essential role in the modification of the coherent cross section, the uncertainty in our results due to the various choices of optical-potential models is relatively small (of at most 30%). By far the largest uncertainty emerges from the ambiguity in extending the many on-shell-equivalent representations of the elementary amplitude off the mass shell. Indeed, relativistic impulseapproximation calculations that include the same pionic distortions, the same nuclear-structure model, and two sets of elementary amplitudes that are identical on-shell, lead to variations in the magnitude of the coherent cross section by up to factors of five. Finally, we address qualitatively the assumption of locality implicit in most impulse-approximation treatments, and suggest that the coherent reaction probes-in addition to the nuclear density-the polarization structure of the nucleus. PACS number(s): 14.40.Aq,24.10.Jv Typeset using REVT E X

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Section: B Resultssupporting

confidence: 59%

Lessons to be learned from the coherent photoproduction of pseudoscalar mesons

et al. 1999

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“…→ π 0 + 12 C g.s. with the existing data [38,39]. The long-dashed lines are obtained without FSI and without the medium effects on propagation.…”

Section: B Coherent Pion Photoproductionmentioning

confidence: 80%

“…A procedure for deriving the Lorentz matrix and the transformation factors in Eq. (38) is explained in Appendix B.…”

Section: Transition Matrix Element: Resonant Partmentioning

confidence: 99%

Dynamical model of coherent pion production in neutrino-nucleus scattering

et al. 2010

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We study coherent pion production in neutrino-nucleus scattering in the energy region relevant to neutrino oscillation experiments of current interest. Our approach is based on the combined use of the Sato-Lee model of electroweak pion production on a nucleon and the -hole model of pion-nucleus reactions. Thus we develop a model that describes pion-nucleus scattering and electroweak coherent pion production in a unified manner. Numerical calculations are carried out for the case of the 12 C target. All the free parameters in our model are fixed by fitting to both total and elastic differential cross sections for π -12 C scattering. Then we demonstrate the reliability of our approach by comparing our prediction for coherent pion photoproductions with the data. Finally, we calculate total and differential cross sections for neutrino-induced coherent pion production, and some of the results are compared with recent data from K2K, SciBooNE, and MiniBooNE. We also study the effect of nonlocality of propagation in the nucleus and compare the elementary amplitudes used in different microscopic calculations.

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“…→ π 0 + 12 C g.s. with data [206,207]. Different curves in each panel include different dynamical contents.…”

Section: Coherent Pion Productionsmentioning

confidence: 99%

Towards a unified model of neutrino-nucleus reactions for neutrino oscillation experiments

et al. 2017

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A precise description of neutrino-nucleus reactions will play a key role in addressing fundamental questions such as the leptonic CP violation and the neutrino mass hierarchy through analyzing data from next-generation neutrino oscillation experiments. The neutrino energy relevant to the neutrino-nucleus reactions spans a broad range and, accordingly, the dominant reaction mechanism varies across the energy region from quasi-elastic scattering through nucleon resonance excitations to deep inelastic scattering. This corresponds to transitions of the effective degree of freedom for theoretical description from nucleons through meson-baryon to quarks. The main purpose of this review is to report our recent efforts towards a unified description of the neutrino-nucleus reactions over the wide energy range; recent overall progress in the field is also sketched. Starting with an overview of the current status of neutrino-nucleus scattering experiments, we formulate the cross section to be commonly used for the reactions over all the energy regions. A description of the neutrino-nucleon reactions follows and, in particular, a dynamical coupled-channels model for meson productions in and beyond the [Formula: see text](1232) region is discussed in detail. We then discuss the neutrino-nucleus reactions, putting emphasis on our theoretical approaches. We start the discussion with electroweak processes in few-nucleon systems studied with the correlated Gaussian method. Then we describe quasi-elastic scattering with nuclear spectral functions, and meson productions with a [Formula: see text]-hole model. Nuclear modifications of the parton distribution functions determined through a global analysis are also discussed. Finally, we discuss issues to be addressed for future developments.

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Measurement of the elastic π0 photoproduction cross sections on 12C and 13C

Cited by 12 publications

References 20 publications

Lessons to be learned from the coherent photoproduction of pseudoscalar mesons

Lessons to be learned from the coherent photoproduction of pseudoscalar mesons

Dynamical model of coherent pion production in neutrino-nucleus scattering

Towards a unified model of neutrino-nucleus reactions for neutrino oscillation experiments

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