Study of the alpha-particle monopole transition form factor

2024/06/02 by M. Viviani, A. Kievsky, Viviani, M. +5 · 1 citation
Engineering · Physics and Astronomy · #Particle accelerators and beam dynamics #Particle Accelerators and Free-Electron Lasers #Neutrino Physics Research

paper · pdf · doi:10.48550/arxiv.2406.00653

Abstract

The 4He monopole form factor is studied by computing the transition matrix element of the electromagnetic charge operator between the 4He ground-state and the p+3H and n+3He scattering states. The nuclear wave functions are calculated using the hyperspherical harmonic method, by starting from Hamiltonians including two- and three-body forces derived in chiral effective field theory. The electromagnetic charge operator retains, beyond the leading order (impulse approximation) term, also higher order contributions, as relativistic corrections and meson-exchange currents. The results for the monopole form factor are in fairly agreement with recent MAMI data. Comparison with other theoretical calculations are also provided.

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