Speaker
Dr
Vincenzo Cirigliano
(Los Alamos National Laboratory)
Description
Within the framework of chiral effective field theory I will discuss the leading contributions to the neutrinoless double-beta decay transition operator induced by light Majorana neutrinos. Based on renormalization arguments, I will argue that one needs to introduce a leading-order short-range operator, missing in all current calculations. I will then discuss strategies to determine the finite part of the short-range coupling by matching to lattice QCD or by relating it via chiral symmetry to isospin-breaking observables in the two-nucleon sector. Finally, I will estimate the impact of this new contribution on nuclear matrix elements of relevance to experiment.
| cirigliano@lanl.gov |
Primary author
Dr
Vincenzo Cirigliano
(Los Alamos National Laboratory)
