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New Leading Contribution to Neutrinoless Double-β Decay

Vincenzo Cirigliano, Wouter Dekens, Jordy de Vries, Michael L. Graesser, Emanuele Mereghetti, Saori Pastore, and Ubirajara van Kolck
Phys. Rev. Lett. 120, 202001 – Published 16 May 2018
Physics logo See Synopsis: A Missing Piece in the Neutrinoless Beta-Decay Puzzle

Abstract

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.

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  • Received 1 March 2018
  • Revised 28 March 2018

DOI:https://doi.org/10.1103/PhysRevLett.120.202001

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Synopsis

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A Missing Piece in the Neutrinoless Beta-Decay Puzzle

Published 16 May 2018

The inclusion of short-range interactions in models of neutrinoless double-beta decay could impact the interpretation of experimental searches for the elusive decay.

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Authors & Affiliations

Vincenzo Cirigliano1, Wouter Dekens1, Jordy de Vries2, Michael L. Graesser1, Emanuele Mereghetti1, Saori Pastore1, and Ubirajara van Kolck3,4

  • 1Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  • 2Nikhef, Theory Group, Science Park 105, 1098 XG Amsterdam, The Netherlands
  • 3Institut de Physique Nucléaire, CNRS/IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay, France
  • 4Department of Physics, University of Arizona, Tucson, Arizona 85721, USA

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Issue

Vol. 120, Iss. 20 — 18 May 2018

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