<math><mmultiscripts><mi mathvariant="normal">O</mi><mprescripts/><none/><mn>16</mn></mmultiscripts></math> spectral function from coupled-cluster theory: Applications to lepton-nucleus scattering

spectral function by combining coupled-cluster theory with a Gaussian integral transform and by expanding the integral kernel in terms of Chebyshev polynomials to allow for a quantification of the theoretical uncertainties. We perform an analysis of the spectral function and employ it to predict lepton-nucleus scattering. Our results well describe the

{}^{16}O

electron-scattering data in the quasielastic peak for momentum transfers

| q | ⪆ 500

MeV and electron energies up to 1.2 GeV, extending, therefore, the so-called first-principles approach to lepton-nucleus cross sections well into the relativistic regime. To prove the applicability of this method to neutrino-nucleus cross sections, we implement our

{}^{16}O

spectral functions in the nuwro Monte Carlo event generator and provide a comparison with recently published T2K neutrino data.

Note:

12 pages, 9 figures

lepton nucleus: scattering
electron: energy
neutrino nucleus: scattering
spectral representation
Monte Carlo
J-PARC Lab
KAMIOKANDE
momentum transfer

References(46)

Figures(24)

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${}^{16}O$ spectral function from coupled-cluster theory: Applications to lepton-nucleus scattering