Electric dipole moment of light nuclei in chiral effective field theory
1 Theory Center, Jefferson Lab, Newport News, Virginia 23606, USA
2 Amherst Center for Fundamental Interactions, Department of Physics, University of Massachusetts Amherst, Amherst, MA 01003, USA
3 RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
4 INFN-Pisa, 56127 Pisa, Italy
* e-mail: email@example.com
Published online: 11 January 2022
CP-violating interactions at quark level generate CP-violating nuclear interactions and currents, which could be revealed by looking at the presence of a permanent nuclear electric dipole moment. Within the framework of chiral effective field theory, we discuss the derivation of the CP-violating nuclear potential up to next-to-next-to leading order (N2LO) and the preliminary results for the charge operator up to next-to leading order (NLO). Moreover, we introduce some renormalization argument which indicates that we need to promote the short-distance operator to the leading order (LO) in order to reabsorb the divergences generated by the one pion exchange. Finally, we present some selected numerical results for the electric dipole moments of 2H, 3He and 3H discussing the systematic errors introduced by the truncation of the chiral expansion.
© The Authors, published by EDP Sciences, 2022
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