Influence of short-range correlations in neutrino-nucleus scattering

Cuyck, T. Van; Jachowicz, Natalie; González-Jiménez, R.; Martini, M.; Pandey, V.; Ryckebusch, Jan; Dessel, N. Van

doi:10.1103/physrevc.94.024611

Cited by 59 publications

(74 citation statements)

References 86 publications

(129 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The LCA is a methodology with applications in nuclear reactions and nuclear structure. In LCA one can compute the observables for SRC dominated nucleon knockout reactions [10,[40][41][42][43]. Furthermore, the impact of SRC on nuclear momentum distributions [35,36] can be quantified across the nuclear mass range as even for the heaviest nuclei the numerical calculations are manageable.…”

Section: A Single-nucleon Momentum Distributionsmentioning

confidence: 99%

Isospin composition of the high-momentum fluctuations in nuclei from asymptotic momentum distributions

et al. 2019

View full text Add to dashboard Cite

Background: High-momentum nucleons in a nuclear environment can be associated with short-range correlations (SRC) that primarily occur between nucleon pairs. Observations and theoretical developments have indicated that the SRC properties can be captured by general quantitative principles that are subject to model-dependence upon quantification. The variations in the aggregated effect of SRC across nuclei, however, can be quantified in an approximately model-independent fashion in terms of the so-called SRC scaling factors that capture the aggregated effect of SRC for a specific nucleus A relative to the deuteron (A-to-d).Purpose: Provide predictions for the SRC scaling factors across the nuclear periodic table and determine the relative contribution of the different nucleon pair combinations to this quantity. Determine the SRC scaling factors for both bound protons and bound neutrons and study how these quantities evolve with the neutron-to-proton ( N Z ) ratio in asymmetric nuclei. Methods: We employ the low-order correlation operator approximation (LCA) to compute the SRC contribution to the single-nucleon momentum distribution and ratios of A-to-d momentum distributions. We do this for a sample of fifteen nuclei from He to Pb thereby gaining access to the evolution of the SRC scaling factor with the nuclear mass 4 ≤ A ≤ 208 and the neutron-to-proton ratio 1.0 ≤ N Z ≤ 1.54. Results: We provide evidence for approximate A-to-d scaling of the single-nucleon momentum distribution at nucleon momenta exceeding about 4 fm −1 . For the studied sample of fifteen nuclei, the total SRC scaling factor is in the range 4.05-5.14 of which roughly 3 can be attributed to proton-neutron (pn) correlations. The SRC scaling factors receive sizeable contributions from pp and nn correlations. They depend on the N Z ratio reflecting the fact that the minority species (protons) becomes increasingly more short-range correlated with increasing N Z . We compare the computed SRC scaling factors in the LCA with those of ab-initio calculations and with measured quantities from SRC-sensitive inclusive electron-scattering data.Conclusions: It is shown that the LCA provides predictions for the SRC scaling factors across the nuclear table that are in line with measured values. In asymmetric nuclei there are sizeable differences between the SRC scaling factors for protons and neutrons. It is suggested that this phenomenon may impact the variations of the magnitude of the European muon collaboration (EMC) effect across nuclei. Our results corroborate the finding that SRC physics can be qualitatively understood by universal principles that build on local modifications of mean-field wave functions of nucleon pairs.

show abstract

Section: A Single-nucleon Momentum Distributionsmentioning

confidence: 99%

Isospin composition of the high-momentum fluctuations in nuclei from asymptotic momentum distributions

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Obviously, the measured cross sections include contributions from channels beyond QE, like excitations, evident as the second peak in the data, and 2p-2h contributions. Our description is restricted to QE processes and further work is in progress on the role of processes beyond QE ones [61].…”

Section: A Electron Scatteringmentioning

confidence: 99%

Low-energy excitations and quasielastic contribution to electron-nucleus and neutrino-nucleus scattering in the continuum random-phase approximation

et al. 2015

Self Cite

View full text Add to dashboard Cite

We present a detailed study of a continuum random-phase approximation approach to quasielastic electronnucleus and neutrino-nucleus scattering. We compare the (e,e ) cross-section predictions with electron scattering data for the nuclear targets 12 C, 16 O, and 40 Ca, in the kinematic region where quasielastic scattering is expected to dominate. We examine the longitudinal and transverse contributions to 12 C(e,e ) and compare them with the available data. We find an overall satisfactory description of the (e,e ) data. Further, we study the 12 C(ν μ ,μ − ) cross sections relevant for accelerator-based neutrino-oscillation experiments. We pay special attention to low-energy excitations which can account for non-negligible contributions in measurements, and require a beyond-Fermi-gas formalism.

show abstract

“…Two-particle two-hole (2p-2h) excitations in electroweak nuclear reactions have been extensively explored in the past [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] in electron and neutrino scattering studies. These states, where two nucleons are promoted above the Fermi level leaving two holes inside the Fermi sea, are known to give a large contribution to the inclusive (e,e ) cross section in the so-called "dip region", corresponding to excitation energies lying between the quasielastic (QE) and (1232) excitation peaks.…”

Section: Introductionmentioning

confidence: 99%