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Towards Reliable Nuclear Matrix Elements for Neutrinoless Decay
Javier Menéndez
The calculated nuclear matrix elements for the neutrinoless double-beta () decay suffer from several limitations. Predicted matrix-element values depend on the many-body meth…
Double Gamow-Teller transitions and its relation to neutrinoless decay
Noritaka Shimizu, Javier Menéndez, Kentaro Yako
We study the double Gamow-Teller (DGT) strength distribution of Ca with state-of-the-art large-scale nuclear shell model calculations. Our analysis shows that the centroid e…
Nuclear physics insights for new-physics searches using nuclei: Neutrinoless decay and dark matter direct detection
Javier Menéndez
Experiments using nuclei to probe new physics beyond the Standard Model, such as neutrinoless decay searches testing whether neutrinos are their own antiparticle, and direct d…
Uncertainties in constraining low-energy constants from H decay
P. Klos, A. Carbone, K. Hebeler +2
We discuss the uncertainties in constraining low-energy constants of chiral effective field theory from H decay. The half-life is very precisely known, so that the Gamow-Te…
Status and Future of Nuclear Matrix Elements for Neutrinoless Double-Beta Decay: A Review
Jonathan Engel, Javier Menéndez
The nuclear matrix elements that govern the rate of neutrinoless double beta decay must be accurately calculated if experiments are to reach their full potential. Theorists have be…
Three-nucleon forces and spectroscopy of neutron-rich calcium isotopes
J. D. Holt, J. Menendez, J. Simonis +1
We study excited-state properties of neutron-rich calcium isotopes based on chiral two- and three-nucleon interactions. We first discuss the details of our many-body framework, inv…
Role of three-nucleon forces and many-body processes in nuclear pairing
J. D. Holt, J. Menendez, A. Schwenk
We present microscopic valence-shell calculations of pairing gaps in the calcium isotopes, focusing on the role of three-nucleon (3N) forces and many-body processes. In most cases,…
Three-body forces and proton-rich nuclei
J. D. Holt, J. Menéndez, A. Schwenk
We present the first study of three-nucleon (3N) forces for proton-rich nuclei along the N=8 and N=20 isotones. Our results for the ground-state energies and proton separation ener…
Chiral three-nucleon forces and bound excited states in neutron-rich oxygen isotopes
J. D. Holt, J. Menendez, A. Schwenk
We study the spectra of neutron-rich oxygen isotopes based on chiral two- and three-nucleon interactions. First, we benchmark our many-body approach by comparing ground-state energ…
Deformation and the Nuclear Matrix Elements of the Neutrinoless Double Beta Decay
J. Menendez, A. Poves, E. Caurier +1
In this talk I will review the "state of the art" of the calculations of the nuclear matrix elements (NME) of the neutrinoless double beta decays for the nuclei 48Ca, 76Ge, 82Se, 1…