2012/08/29 by Saori Pastore, S. Pastore, Pastore, S. +6
Physics and Astronomy · #Nuclear physics research studies #Quantum, superfluid, helium dynamics #Scientific Research and Discoveries #nucl-th
paper · pdf · doi:10.48550/arxiv.1208.6034
5 pages, 2 figures. Invited talk at CIPANP 2012 - St. Petersburg, FL
arxiv created 2012/08/29 · arxiv updated 2012/08/31
We present Quantum Monte Carlo calculations of magnetic moments and M1 transitions in A≤ 9 nuclei which take into account contributions of two-body electromagnetic currents. The Hamiltonian utilized to generate the nuclear wave functions includes the realistic Argonne-\it v18 two-nucleon and the Illinois-7 three-nucleon interactions. The nuclear two-body electromagnetic currents are derived from a pionful chiral effective field theory including up to one-loop corrections. These currents involve unknown Low Energy Constants which have been fixed so as to reproduce a number of experimental data for the two- and three-nucleon systems, such as np phase shifts and deuteron, triton, and 3He magnetic moments. This preliminary study shows that two-body contributions provide significant corrections which are crucial to bring the theory in agreement with the experimental data in both magnetic moments and M1 transitions.