New Leading Contribution to Neutrinoless Double- β Decay

Vincenzo Cirigliano, Wouter Dekens, Jordy De Vries, Michael L. Graesser, Emanuele Mereghetti, Saori Pastore, Ubirajara Van Kolck

Research output: Contribution to journalArticlepeer-review

54 Scopus citations


Within the framework of chiral effective field theory, we discuss the leading contributions to the neutrinoless double-beta decay transition operator induced by light Majorana neutrinos. Based on renormalization arguments in both dimensional regularization with minimal subtraction and a coordinate-space cutoff scheme, we show the need to introduce a leading-order short-range operator, missing in all current calculations. We 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, we speculate on the impact of this new contribution on nuclear matrix elements of relevance to experiment.

Original languageEnglish (US)
Article number202001
JournalPhysical review letters
Issue number20
StatePublished - May 16 2018

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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