A Virtual Tribute to Quark Confinement and the Hadron Spectrum 2021

Electric dipole moment of light nuclei in χEFT

2 Aug 2021, 17:25

25m

online

Parallel contribution E: QCD and New Physics Parallels Track E

Speaker

Alex Gnech (JLAB)

Description

$CP$-violating interactions at quark level generate $CP$-violating nuclear forces which could be revealed by looking at the presence of a permanent nuclear electric dipole moments. Within the framework of chiral effective field theory and thanks to the modern $ab-initio$ techniques, it is possible to perform realistic calculation for the electric dipole moment of the light nuclei. In this work we present the calculation of the electric dipole moments of ${}^2$H, ${}^3$He and ${}^3$H discussing the systematic errors introduced by the truncation of the chiral expansion. The $CP$-violating nucleon-nucleon and three-nucleon potential up to next-to-next-to leading order (N2LO) derivation will be also discussed. Moreover, we introduce some recent renormalization argument which indicates that a promotion of the short-distance operator to leading-order is needed to have a consistent picture of the $CP$-violating nuclear forces.