The nucleon axial mass and the MiniBooNE Quasielastic Neutrino-Nucleus Scattering problem
TL;DR: In this article, the charged-current double differential neutrino cross section was analyzed using a microscopical model that accounts for, among other nuclear effects, long range nuclear correlations and multinucleon scattering.
About: This article is published in Physics Letters B.The article was published on 2012-01-16 and is currently open access. It has received 197 citations till now. The article focuses on the topics: MiniBooNE & Neutrino.
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TL;DR: In this article, the authors report on measurements of neutrino oscillation using data from the T2K long-baseline neutrinos experiment collected between 2010 and 2013 and find the following estimates and 68% confidence intervals for the two possible mass hierarchies: Normal Hierarchy:
Abstract: We report on measurements of neutrino oscillation using data from the T2K long-baseline neutrino experiment collected between 2010 and 2013. In an analysis of muon neutrino disappearance alone, we find the following estimates and 68% confidence intervals for the two possible mass hierarchies: Normal Hierarchy: $\sin^2\theta_{23}=0.514^{+0.055}_{-0.056}$ and $\Delta m^2_{32}=(2.51\pm0.10)\times 10^{-3}$ eV$^2$/c$^4$ Inverted Hierarchy: $\sin^2\theta_{23}=0.511\pm0.055$ and $\Delta m^2_{13}=(2.48\pm0.10)\times 10^{-3}$ eV$^2$/c$^4$ The analysis accounts for multi-nucleon mechanisms in neutrino interactions which were found to introduce negligible bias. We describe our first analyses that combine measurements of muon neutrino disappearance and electron neutrino appearance to estimate four oscillation parameters and the mass hierarchy. Frequentist and Bayesian intervals are presented for combinations of these parameters, with and without including recent reactor measurements. At 90% confidence level and including reactor measurements, we exclude the region: $\delta_{CP}=[0.15,0.83]\pi$ for normal hierarchy and $\delta_{CP}=[-0.08,1.09]\pi$ for inverted hierarchy. The T2K and reactor data weakly favor the normal hierarchy with a Bayes Factor of 2.2. The most probable values and 68% 1D credible intervals for the other oscillation parameters, when reactor data are included, are: $\sin^2\theta_{23}=0.528^{+0.055}_{-0.038}$ and $|\Delta m^2_{32}|=(2.51\pm0.11)\times 10^{-3}$ eV$^2$/c$^4$.
302 citations
Cites background or methods from "The nucleon axial mass and the Mini..."
...[125] J. Nieves, F. Sanchez, I. Ruiz Simo, and M. J. Vicente Vacas, Phys....
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...[122] J. Nieves, M. Valverde, and M. J. Vicente Vacas, Phys....
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...[24] J. Nieves, I. R. Simo, and M. J. V. Vacas, Phys....
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...As an alternative, we turn off PDD and use a model by Nieves [24] to simulate multinucleon interactions for neutrino energies below 1....
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...Interactions not modeled in this version of NEUT include, but are not limited to, multinucleon interactions in the nucleus [24,25], and neutrinoelectron scattering processes....
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TL;DR: In this paper, the spectrum and electromagnetic properties of baryons described as relativistic three-quark bound states within QCD are discussed from a theoretical perspective, focusing on nonperturbative QCD as encoded in the functional approach via Dyson-Schwinger and Bethe-Salpeter equations.
266 citations
TL;DR: In this article, the spectrum and electromagnetic properties of baryons described as relativistic three-quark bound states within QCD are discussed from a theoretical perspective, focusing on nonperturbative QCD as encoded in the functional approach via Dyson-Schwinger and Bethe-Salpeter equations.
Abstract: We review the spectrum and electromagnetic properties of baryons described as relativistic three-quark bound states within QCD. The composite nature of baryons results in a rich excitation spectrum, whilst leading to highly non-trivial structural properties explored by the coupling to external (electromagnetic and other) currents. Both present many unsolved problems despite decades of experimental and theoretical research. We discuss the progress in these fields from a theoretical perspective, focusing on nonperturbative QCD as encoded in the functional approach via Dyson-Schwinger and Bethe-Salpeter equations. We give a systematic overview as to how results are obtained in this framework and explain technical connections to lattice QCD. We also discuss the mutual relations to the quark model, which still serves as a reference to distinguish 'expected' from 'unexpected' physics. We confront recent results on the spectrum of non-strange and strange baryons, their form factors and the issues of two-photon processes and Compton scattering determined in the Dyson-Schwinger framework with those of lattice QCD and the available experimental data. The general aim is to identify the underlying physical mechanisms behind the plethora of observable phenomena in terms of the underlying quark and gluon degrees of freedom.
255 citations
Cites background from "The nucleon axial mass and the Mini..."
...The origin of this discrepancy is unclear and could be a consequence of nuclear medium effects [594] or a deviation from the dipole form [595]....
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University of Valencia1, Aligarh Muslim University2, University of Turin3, Colorado State University4, Hampton University5, Fermilab6, Massachusetts Institute of Technology7, University of Pittsburgh8, Northwestern University9, University of Kentucky10, Virginia Tech11, Ghent University12, Queen Mary University of London13, Michigan State University14, Université Paris-Saclay15, University of South Carolina16, Thomas Jefferson National Accelerator Facility17, IFAE18, University of Wrocław19
TL;DR: In this paper, the neutrino properties are modeled as a nuclear model and its theoretical uncertainties play an important role in interpreting every result, which is essential to every phase of experimental analyses.
233 citations
TL;DR: In this article, the present experimental and theoretical knowledge of neutrino-nucleus interaction physics is reviewed from both the theoretical and experimental point of view, focusing on these cross sections in different reaction channels.
Abstract: Neutrino oscillations physics is entering an era of high precision. In this context, accelerator-based neutrino experiments need a reduction in systematic errors to the level of a few percent. Today, one of the most important sources of systematic errors are neutrino–nucleus cross sections which, in the energy region of hundreds of MeV to a few GeV, are known to a precision not exceeding 20%. In this article we review the present experimental and theoretical knowledge of neutrino–nucleus interaction physics. After introducing neutrino-oscillation physics and accelerator-based neutrino experiments, we give an overview of general aspects of neutrino–nucleus cross sections, from both the theoretical and experimental point of view. Then, we focus on these cross sections in different reaction channels. We start with the quasi-elastic and quasi-elastic-like cross section, placing a special emphasis on the multinucleon emission channel, which has 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 the differences among them. The discussion is always driven by a comparison with the experimental data. We then consider the one-pion production channel where agreement between data and theory remains highly unsatisfactory. We describe how to interpret pion data, and then analyze, in particular, the puzzle related to the difficulty 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 and cross sections, relevant for the charge-conjugation-parity violation experiments. The impact of nuclear effects on the reconstruction of neutrino energy and on the determination of the neutrino-oscillation parameters is also reviewed. Finally, we look to the future by discussing projects and efforts in relation to future detectors, beams, and analysis.
135 citations
References
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TL;DR: A unified treatment of pionic nuclear excitations both at low energy (ω«m π ) and at scattering energies (mπ ≲ ω ≲ 3 m π) is presented in this article.
328 citations
TL;DR: In this paper, the current status of experimental and theoretical understanding of the axial nucleon structure at low and moderate energies is reviewed, including (quasi)elastic (anti)neutrino-nucleon scattering, charged pion electroproduction off nucleons and ordinary as well as radiative muon capture on the proton.
Abstract: We review the current status of experimental and theoretical understanding of the axial nucleon structure at low and moderate energies. Topics considered include (quasi)elastic (anti)neutrino–nucleon scattering, charged pion electroproduction off nucleons and ordinary as well as radiative muon capture on the proton.
310 citations
TL;DR: In this article, the authors review the experimental data base in view of the new results for the proton, and neutron, obtained at JLab, MAMI, and MIT-Bates.
307 citations
TL;DR: In this article, a model for weak charged-current induced nuclear reactions at energies of interest for current and future neutrino oscillation experiments is presented, based on a systematic many-body expansion of the gauge boson absorption modes that includes one, two, and even three-body mechanisms, as well as the excitation of $\ensuremath{\Delta}$ isobars.
Abstract: We present a model for weak charged-current induced nuclear reactions at energies of interest for current and future neutrino oscillation experiments. This model is a natural extension of the work in Refs. [1,2], where the quasielastic contribution to the inclusive electron and neutrino scattering on nuclei was analyzed. The model is based on a systematic many-body expansion of the gauge boson absorption modes that includes one, two, and even three-body mechanisms, as well as the excitation of $\ensuremath{\Delta}$ isobars. The whole scheme has no free parameters, besides those previously adjusted to the weak pion production off the nucleon cross sections in the deuteron, since all nuclear effects were set up in previous studies of photon, electron, and pion interactions with nuclei. We have discussed at length the recent charged-current quasielastic MiniBooNE cross section data, and showed that two-nucleon knockout mechanisms are essential to describing these measurements.
289 citations
TL;DR: In this article, a theory of neutrino interactions with nuclei aimed at the description of the partial cross sections, namely quasielastic and multinucleon emission, coherent and incoherent single-pion production, is presented.
Abstract: We present a theory of neutrino interactions with nuclei aimed at the description of the partial cross sections, namely quasielastic and multinucleon emission, coherent and incoherent single-pion production. For this purpose, we use the theory of nuclear responses treated in the random-phase approximation, which allows a unified description of these channels. It is particularly suited for the coherent pion production where collective effects are important, whereas they are moderate in the other channels. We also study the evolution of the neutrino cross sections with the mass number from carbon to calcium. We compare our approach to the available neutrino experimental data on carbon. We put a particular emphasis on the multinucleon channel, which at present is not easily distinguishable from the quasielastic events. This component turns out to be quite relevant for the interpretation of experiments (K2K, MiniBooNE, SciBooNE). It can account in particular for the unexpected behavior of the quasielastic cross section.
242 citations