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 | |
| State | Published - May 16 2018 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
New Leading Contribution to Neutrinoless Double- β Decay. / Cirigliano, Vincenzo; Dekens, Wouter; De Vries, Jordy; Graesser, Michael L.; Mereghetti, Emanuele; Pastore, Saori; Van Kolck, Ubirajara.
In: Physical Review Letters, Vol. 120, No. 20, 202001, 16.05.2018.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - New Leading Contribution to Neutrinoless Double- β Decay
AU - Cirigliano, Vincenzo
AU - Dekens, Wouter
AU - De Vries, Jordy
AU - Graesser, Michael L.
AU - Mereghetti, Emanuele
AU - Pastore, Saori
AU - Van Kolck, Ubirajara
PY - 2018/5/16
Y1 - 2018/5/16
N2 - 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.
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.
UR - http://www.scopus.com/inward/record.url?scp=85047211495&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85047211495&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.120.202001
DO - 10.1103/PhysRevLett.120.202001
M3 - Article
AN - SCOPUS:85047211495
VL - 120
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 20
M1 - 202001
ER -