https://doi.org/10.1140/epja/s10050-020-00249-y
Regular Article - Theoretical Physics
Subleading contributions to the nuclear scalar isoscalar current
1
Fakultät für Physik und Astronomie, Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780, Bochum, Germany
2
Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn, D-53115, Bonn, Germany
3
Institute for Advanced Simulation, Institut für Kernphysik, and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425, Jülich, Germany
4
Tbilisi State University, 0186, Tbilisi, Georgia
* e-mail: hermann.krebs@rub.de
Received:
10
June
2020
Accepted:
9
September
2020
Published online:
27
September
2020
We extend our recent analyses of the nuclear vector, axial-vector and pseudoscalar currents and derive the leading one-loop corrections to the two-nucleon scalar current operator in the framework of chiral effective field theory using the method of unitary transformation. We also show that the scalar current operators at zero momentum transfer are directly related to the quark mass dependence of the nuclear forces.
© The Author(s), 2020
