Quantum Monte Carlo calculations of electromagnetic moments and transitions in A$\leq$10 nuclei with two-body $\chi$EFT currents

We present ab initio Quantum Monte Carlo calculations of electromagnetic observables of light nuclei based on a many-body nuclear Hamiltonian consisting of the Argonne-v18 and Illioins-7 two- and three-nucleon potentials, respectively. External electromagnetic probes interact with the electromagnetic charge and current distributions of nuclei. Nuclear charge and current operators account for one- and two-body contributions describing, respectively, the coupling of photons with individual nucleons, as well as pairs of interacting nucleons. Two-body operators are derived from a chiral effective field theory with pions and nucleons including up to two-pion exchange corrections. It is found that two-body contributions can be large and crucial to reach agreement with the experimental data, particularly for selected nuclear magnetic moments and M1 transitions.

numerical calculations: Monte Carlo
nucleus: many-body problem
nucleus: charge
effective field theory: chiral
nucleon: interaction
current: operator
exchange: two-pion
photon: coupling
electromagnetic
light nucleus

References(17)

Figures(0)

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Quantum Monte Carlo calculations of electromagnetic moments and transitions in A≤\leq≤10 nuclei with two-body χ\chiχEFT currents

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Quantum Monte Carlo calculations of electromagnetic moments and transitions in A $\leq$ 10 nuclei with two-body $\chi$ EFT currents