Transverse enhancement model and MiniBooNE charge current quasi-elastic neutrino scattering data

Abstract

Recently proposed Transverse Enhancement Model of nuclear effects in Charge Current Quasi-Elastic neutrino scattering

Many-body interactions of neutrinos with nuclei: Observables

“…There are two features of this expression that affect the analysis of a 2p-2h event using Eq. (20), which is correct only for true QE scattering, i.e., a 1p-1h event. First, in the last section we have shown that, at forward angles, where the cross section is largest, the 2p-2h contributions are largest at small T µ , below the QE peak.…”

“…First, in the last section we have shown that, at forward angles, where the cross section is largest, the 2p-2h contributions are largest at small T µ , below the QE peak. When analyzing such events with the help of the one-body expression (20) this leads to a lower reconstructed neutrino energy than the true one. Second, while QE scattering is strongly forward peaked, the 2p-2h events are fairly flat (within a factor of 2) in lepton angle (see Figs.…”

“…In this experiment the neutrino energy is reconstructed according to Eq. (20), but neglecting the binding energy, i.e., with E B = 0. Our results for the cross sections versus the reconstructed energy are shown in Fig.…”

“…[19] then are able to describe the Mini-BooNE data vs. reconstructed energy and even -approximately -the disappearance of the excess in the NOMAD experiment. It has recently been shown [20] that this adhoc ansatz of [19] also describes the double-differential cross sections. Finally, Meucci et al [21] find within the relativistic Green's function model (RGF), which is basically related to the (one-particle) impulse approximation, a very strong effect of FSI.…”

Running axial mass of the nucleon as a phenomenological tool for calculating quasielastic neutrino–nucleus cross sections

“…Modern explanations of the recent experiments include the effects beyond the scope of the naive RFG and impulse approximation. Among these are various extensions of the standard (global) RFG model, such as local Fermi gas (LFG) model [37], local density approximation (LDA) [38], and spectral function (SF) approach [39][40][41][42][43][44][45][46][47][48]; relativistic mean field and relativistic Green's function models [49,50]; charged meson-exchange currents (MEC), intermediate Δ isobar or multi-nucleon excitations [51,52], short-range and long-range correlations (SRC and LRC) within random phase approximation (RPA) [53][54][55]; quantum-kinetic transport equations (implemented in the GiBUU code) [56,57]; parametrization of the observed enhancement in the transverse electron quasielastic response function (presumably because of MEC) [45,[58][59][60]; a variety of so-called superscaling models, e.g., SuSA [61,62], SuSAv2 [63,64], SuSAv2-MEC [65][66][67], and SuSAM * [68]. The most comprehensive microscopic and phenomenological models usually increase the CCQE cross sections at low energies, thus providing better data explanation without increasing M RFG A (see Refs.…”