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

doi:10.1103/PhysRevLett.120.202001

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 journal › Article › peer-review

119 Scopus citations

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.

Original language	English (US)
Article number	202001
Journal	Physical review letters
Volume	120
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.120.202001
State	Published - May 16 2018
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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title = "New Leading Contribution to Neutrinoless Double- β Decay",

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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AU - Cirigliano, Vincenzo

AU - Dekens, Wouter

AU - De Vries, Jordy

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AU - Mereghetti, Emanuele

AU - Pastore, Saori

AU - Van Kolck, Ubirajara

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AB - 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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New Leading Contribution to Neutrinoless Double- β Decay

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