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Published on: October 12, 2019
Electromagnetic Response of ^{12}C: A First-Principles Calculation
A Lovato1, S Gandolfi2, J Carlson2
1Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
Abstract:
The longitudinal and transverse electromagnetic response functions of ^{12}C are computed in a "first-principles" Green's function Monte Carlo calculation, based on realistic two- and three-nucleon interactions and associated one- and two-body currents. We find excellent agreement between theory and experiment and, in particular, no evidence for the quenching of the measured versus calculated longitudinal response. This is further corroborated by a reanalysis of the Coulomb sum rule, in which the contributions from the low-lying J^{π}=2^{+}, 0_{2}^{+} (Hoyle), and 4^{+} states in ^{12}C are accounted for explicitly in evaluating the total inelastic strength.
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