The Chiral Long-range Two-pion Exchange Electromagnetic Currents in Radiative Nucleon--Deuteron Capture

R. Skibiński, J. Golak, D. Rozpędzik, K. Topolnicki, H. Witała
2015 Acta Physica Polonica B  
The nucleon-deuteron radiative capture process is investigated using the chiral nuclear potentials and the electromagnetic currents developed by the Bochum-Bonn group. While the strong interaction is taken up to the next-to-next-to-leading order, the electromagnetic current consists of a single nucleon current, the leading one-pion exchange one and is supplemented by contributions from the long-range two-pion exchange current at next-to-leading-order. The theoretical predictions for the cross
more » ... ons for the cross sections as well as analyzing powers show strong dependence on the values of regularization parameters. Only small effects of the three-nucleon force and the long-range two-pion exchange current are observed. The dependence on the choice of regularization parameters results in a big theoretical uncertainty and clearly points to the necessity to include corrections from higher orders of the chiral expansion both for the nuclear forces and currents.
doi:10.5506/aphyspolb.46.159 fatcat:wnn6snaapfbuflatnzymffuzhu