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A non-technical overview of charge current quasi-elastic neutrino interaction is presented. Many body computations of multinucleon ejection which is proposed to explain recent large axial mass measurements are discussed. A few comments on recent experimental results reported at NuInt11 workshop are included.
In this talk we investigate how models for neutrino-nucleus cross sections based on different assumptions for the nuclear dynamics affect the forecasted sensitivities to neutrino oscillation parameters {theta}{sub 13} and {delta} at future {beta} beams.
The neutrino-neutrino interactions inside a supernova core give rise to nonlinear collective effects that significantly influence the neutrino flavor conversions inside the star. I shall describe these interactions, the new oscillation phenomena they generate, and their effect on the neutrino fluxes arriving at the earth.
The analysis of the sample of charged current quasi elastic events collected by the Mini-BooNE collaboration shows that the extension of the approaches successfully employed to describe electron-nucleus scattering to the case of neutrino interactions involves non trivial difficulties. In this paper it is argued that, due to flux average, the double differential neutrino-nucleus cross section does not allow for a clearcut determination of the dominant reaction mechanism. A systematic study of the large body of electron scattering data may help to identify the processes, other than single nucleon knockout, contributing to the observed neutrino cross section.
The neutrino oscillation phenomena in solar, atmospheric and accelerator based experiments have been solidly established during the last decade, recent experiments are aiming at more precise measurements which requires better understanding of the interaction of neutrinos with matter. The International Workshop on Neutrino-Nucleus Interactions in the Few-GeV region (NUINT) is a series of workshops concentrating on low-energy (few GeV), neutrino-nucleus interactions. The goal of this series is to bring theorists and experimentalists from the nuclear and high-energy communities together to address the many challenges to understanding these complex interactions. NUINT workshop series was initiated in KEK (Japan) ten years ago with the goals of understanding the neutrino interactions and its applications to accelerator based and atmospheric neutrino oscillation experiments. An overview of the situation after the last Nuint workshop is discussed in this paper.
Many-body approach to the lepton-nucleus scattering is being tested. Preliminary results containing the 1p1h and {Delta}(1232)h excitations from local Fermi gas are shown. Comparisons are made with the selected inclusive electron scattering data. The importance of the different physical channels is discussed. The main attention is paid to the lepton energy range from about 500 to 2000 MeV, which is crucial for the present T2K and future NOvA neutrino oscillation experiments.
The MINOS experiment has the world's largest data set of neutrino interactions in the 1-10 GeV energy range. In addition, the data are neutrino interactions on iron, allowing us to explore the nuclear effects on neutrino scattering. We present two improvements to the MINOS charged current quasi-elastic analysis presented at NuInt 2009: a background correction function extracted from two resonance enhanced selections, and an improved fit procedure that includes event samples selected by looking for the recoil proton.
We report measurements of charged current inclusive and quasielastic interactions of muon neutrinos on carbon with an average energy of 0.8 GeV by SciBooNE experiment at Fermilab. These two results are complementary to understand the neutrino-nuclear interaction in the few-GeV region with effects of final state interactions.
The status of the ArgoNeuT experiment's neutrino reconstruction software and analysis is presented. A number of physics measurement possibilities with ArgoNeuT are also discussed.
This paper summarizes the discussion about the role of two-particle-two-hole (2p2h) excitations in neutrino-nucleus interactions in the few-GeV region, held at NuInt11.
MiniBooNE anti-neutrino charged-current quasi-elastic (CCQE) data is compared to model predictions. The main background of neutrino-induced events is examined first, where three independent techniques are employed. Results indicate the neutrino flux is consistent with a uniform reduction of {approx}20% relative to the largely uncertain prediction. After background subtraction, the Q{sup 2} shape of {nu}-bar{sub {mu}} CCQE events is consistent with the model parameter M{sub A} = 1.35 GeV determined from MiniBooNE {nu}{sub {mu}} CCQE data, while the normalization is {approx}20% high compared to the same prediction.
Neutral Current Elastic (NCE) interactions in MiniBooNE are discussed. In the neutrino mode MiniBooNE reported: the flux averaged NCE differential cross section as a function of four-momentum transferred squared, an axial mass (M{sub A}) measurement, and a measurement of the strange quark spin content of the nucleon, {Delta}s. In the antineutrino mode we present the background-subtracted data which is compared with the Monte Carlo predictions.
Determination of the quasi‐elastic scattering cross‐section over a broad range of neutrino energies, nuclear targets and Q2 is a primary goal of the MINERvA experiment. We present preliminary comparisons of data and simulation in a sample rich in ν̄μp→μ+n events from approximately one eighth of the total ν̄ events collected by MINERvA to date. We discuss future plans for quasi‐elastic analyses in MINERvA.
The pion final state interaction model in NEUT is described. Modifications and tuning of the model are validated against neutrino and non-neutrino (pion scattering and photoproduction) data. A method for evaluating the uncertainties in the model and propagation of systematic errors in a neutrino oscillation experiment is described, using T2K as a specific example.
At present, neutrinoless double beta decay is perhaps the only experiment that can tell us whether the neutrino is a Dirac or a Majorana particle. Given the significance of the 0{nu}{beta}{beta}, there is a widespread interest for these rare event studies employing a variety of novel techniques. This paper describes the current status of DBD experiments. The Indian effort for an underground NDBD experiment at the upcoming INO laboratory is also presented.
We have seen significant advancement in our understanding of few-GeV neutrino-nucleus interactions since the time of the first NuInt workshop in 2001. Now ten years later, we reflect on our progress. Highlights from the NuInt11 workshop are presented along with some suggestions for future directions.
There is increasing evidence that the scheme, or paradigm, successfully applied to explain the wealth of electron-nucleus scattering data fails to describe the measured quasi elastic neutrino-nucleus cross sections. I argue that, before advocating modifications of the nucleon properties in the nuclear medium, the available data should be analyzed within a new paradigm, allowing for a consistent treatment of the reaction mechanisms, other than single nucleon knockout, contributing to the flux averaged neutrino cross section.
I look back at comparisons of CC neutrino resonance interaction data at very low Q{sup 2}, from seven experiments, compared to the predictions of current neutrino event generators. When compared to data, the generator models, primarily based on the model of Rein and Sehgal, overpredict the event rate at very low Q{sup 2} for samples that are enhanced in resonance {pi}{sup +} interactions.