Electron scattering on A=3 nuclei from quantum Monte Carlo based approaches

Theoretical tools for neutrino scattering: interplay between lattice QCD, EFTs, nuclear physics, phenomenology, and neutrino event generators

“…The computational algorithm exploits a factorization scheme to consistently retain two-body physics, namely two-body correlations and associated two-body currents. Despite limiting the description of the scattering process to interactions of the probe with pairs of correlated nucleons, the STA is found to be in good agreement with both GFMC predictions and experimental data for electron scattering from the alpha particle and the trinucleon systems [65,393,394]. Importantly, the STA can account for interference effects between one-and two-body current contributions that are found to be essential to explain, e.g., the observed excess in the transverse electromagnetic nuclear response [244,313].…”

“…In addition to model development and robust prediction, theory is needed on uncertainty quantification [63]. A positive example of this is the assessment of uncertainties for models used in accelerator experiments [64][65][66]. Theory may be refined from existing or new measurements from electron scattering [67], and the uncertainties on those measurements also need to be quantified and propagated to experiments.…”

“…The nuclear SF has been computed within different semi-phenomenological [74,395] and ab-initio manybody approaches [64,396]. More recently, the SF of A = 3 and A = 4 nuclei has been obtained from VMC and GFMC calculations [65]. This is particularly relevant for studying the dependence of the different observables from the nuclear interactions adopted in the calculation.…”

“…For quasi-elastic scattering the number of qubits required and the evolution time, corresponding to the circuit depth, are modest compared to many other quantum many-body properties at low energies. [65], inclusive double-differential cross sections for electron scattering on 3 He at 469 MeV and 54 • scattering angle. The blue points represent the experimental data of Ref.…”

“…FIG.10. Left Panel: from Ref [65],. inclusive double-differential cross sections for electron scattering on 3 He at 469 MeV and 54 • scattering angle.…”