Modeling neutrino-nucleus interactions in the quasi-elastic regime (original) (raw)

Relativistic models for quasi-elastic neutrino-nucleus scattering

2011

We present quasi-elastic neutrino-nucleus cross sections in the energy range from 150 MeV up to 5 GeV for the target nuclei 12 C and 56 Fe. A relativistic description of the nuclear dynamics and the neutrino-nucleus coupling is adopted. For the treatment of final-state interactions (FSI) we rely on two frameworks succesfully applied to exclusive electron-nucleus scattering: a relativistic optical potential and a relativistic multiple-scattering Glauber approximation. At lower energies, the optical-potential approach is considered to be the optimum choice, whereas at high energies a Glauber approach is more natural. Comparing the results of both calculations, it is found that the Glauber approach yields valid results down to the remarkably small nucleon kinetic energies of 200 MeV. We argue that the nuclear transparencies extracted from A(e, e ′ p) measurements can be used to obtain realistic estimates of the effect of FSI mechanisms on quasi-elastic neutrinonucleus cross sections. We present two independent relativistic plane-wave impulse approximation (RPWIA) calculations of quasi-elastic neutrino-nucleus cross sections. They agree at the percent level, showing the reliability of the numerical techniques adopted and providing benchmark RPWIA results.

Effects of nuclear re-interactions in quasi-elastic neutrino–nucleus scattering

Astroparticle Physics, 2001

The effects of nuclear re-interactions in the quasi elastic neutrino-nucleus scattering are investigated with a phenomenological model. We found that the nuclear responses are lowered and that their maxima are shifted towards higher excitation energies. This is reflected on the total ν-nucleus cross section in a general reduction of about 15% for neutrino energies above 300 MeV.

Relativistic models for quasielastic neutrino scattering

Physical Review C, 2006

We present quasi-elastic neutrino-nucleus cross sections in the energy range from 150 MeV up to 5 GeV for the target nuclei 12 C and 56 Fe. A relativistic description of the nuclear dynamics and the neutrino-nucleus coupling is adopted. For the treatment of final-state interactions (FSI) we rely on two frameworks succesfully applied to exclusive electron-nucleus scattering: a relativistic optical potential and a relativistic multiple-scattering Glauber approximation. At lower energies, the optical-potential approach is considered to be the optimum choice, whereas at high energies a Glauber approach is more natural. Comparing the results of both calculations, it is found that the Glauber approach yields valid results down to the remarkably small nucleon kinetic energies of 200 MeV. We argue that the nuclear transparencies extracted from A(e, e ′ p) measurements can be used to obtain realistic estimates of the effect of FSI mechanisms on quasi-elastic neutrinonucleus cross sections. We present two independent relativistic plane-wave impulse approximation (RPWIA) calculations of quasi-elastic neutrino-nucleus cross sections. They agree at the percent level, showing the reliability of the numerical techniques adopted and providing benchmark RPWIA results.

Overview of neutrino-nucleus quasielastic scattering

2009

Neutrino-nucleus reactions are surveyed. The approximations usually made are identified and a comparison to the corresponding electron-nucleus processes is presented. Impulse Approximation (IA), factorization of the cross-section and scaling approaches (SA) to lepton-nucleus scattering are examined in detail.

A Unified Empirical Model for Quasielastic Interactions of Neutrino and Antineutrino with Nuclei

Physics of Particles and Nuclei Letters, 2020

We propose a simple empirical model for evaluating the quasielastic neutrino-and antineutrinonucleus cross sections, based on the conventional relativistic Fermi-gas model and the notion of running (dipole) axial-vector mass of the nucleon driven by two adjustable parameters (one of which is the ordinary axial mass of the nucleon). The suggested approach provides reasonable agreement with available consistent accelerator data on total, differential, and double differential quasielastic and quasielastic-like cross sections for different nuclear targets.

Neutrino-Nucleus Interactions

Annual Review of Nuclear and Particle Science, 2011

The study of neutrino oscillations has necessitated a new generation of neutrino experiments that are exploring neutrino-nuclear scattering processes. We focus in particular on charged-current quasi-elastic scattering, a particularly important channel that has been extensively investigated both in the bubble-chamber era and by current experiments. Recent results have led to theoretical reexamination of this process. We review the standard picture of quasi-elastic scattering as developed in electron scattering, review and discuss experimental results, and discuss additional nuclear effects such as exchange currents and short-range correlations that may play a significant role in neutrino-nucleus scattering.

Simulation of nuclear effects in quasi elastic and resonant neutrino interactions

1998

The effects of nuclear re-interactions in quasi elastic and resonant neutrino interactions have been considered in the framework of the nuclear models of the DPMJET code. A preliminary investigation on the modifications induced on the final state has been performed. Some consequences affecting the experimental identification are discussed.

Calculations of the neutrino nucleon cross sections in nuclear matter

In this study, calculations of the total and differential quasi- elastic cross sections for neutrino and antineutrino scattering on nucleons in nuclear matter are presented within the frame of Pauli suppression model by using up to date fits to the nucleon elastic electromagnetic form factors GE p , GE n , GM p , GM n , and weak and pseudoscalar form factors. It was found that the non-zero value of GE n has a significant effect on both the total and differential neutrino and antineutrino quasielastic cross sections. We perform a re-analysis of previous neutrino data using updated form factors.

Neutrino interactions with nuclei

2009

We present a model for neutrino-nucleus scattering in the energy region relevant for present and forthcoming neutrino-oscillation experiments. The model is based on the RPA treatment of the nuclear responses in the quasi-elastic and Delta-resonance region. It includes also in a phenomenological way nucleon knock-out. It aims at the description, within a single framework, of several final state channels i.e. quasi-elastic, incoherent and coherent one-pion production and two-or several-nucleon knock-out.

Total neutrino and antineutrino nuclear cross sections around 1 GeV

Nuclear Physics A, 2007

We investigate neutrino-nucleus interactions at energies around 1 GeV. In this regime, the main contributions to the cross sections come from quasi-elastic and ∆ production processes. Our formalism, based on the Impulse Approximation is well suited to describe both types of interactions. We focus on a series of important nuclear effects in the interaction of electron neutrinos with 16 O, also relevant to future β-Beams. Our results show that the Fermi gas model, widely used in data analysis of neutrino experiments, overestimates the total cross sections by as much as 20 %.