Publications (28)
Nonperturbative renormalization of the neutrinoless double-beta operator in p-shell nuclei
Deepshikha Shukla, Jonathan Engel, Petr Navratil
We use Lee-Suzuki mappings and related techniques to construct effective two-body p-shell interactions and neutrinoless double-beta operators that exactly reproduce the results of…
Correlating Schiff moments in the light actinides with octupole moments
Jacek Dobaczewski, Jonathan Engel, Markus Kortelainen +1
We show that the measured intrinsic octupole moments of Rn, Ra, and Ra constrain the intrinsic Schiff moments of RaRn, Rn, F…
First Direct Double-Beta Decay Q-value Measurement of 82Se in Support of Understanding the Nature of the Neutrino
David L. Lincoln, Jason D. Holt, Georg Bollen +7
In anticipation of results from current and future double-beta decay studies, we report a measurement resulting in a 82Se double-beta decay Q-value of 2997.9(3) keV, an order of ma…
Corrections to the Neutrinoless Double-Beta-Decay Operator in the Shell Model
Jonathan Engel, Gaute Hagen
We use diagrammatic perturbation theory to construct an effective shell-model operator for the neutrinoless double-beta decay of 82Se. The starting point is the same Bonn-C nucleon…
Effective double-beta-decay operator for 76Ge and 82Se
Jason D. Holt, Jonathan Engel
We use diagrammatic many-body perturbation theory in combination with low-momentum interactions derived from chiral effective field theory to construct effective shell-model transi…
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…
Lanczos Method for QRPA Strength Functions in Atomic Nuclei
Dong Min Roh, Chao Yang, Jonathan Engel +1
We present a symmetric Lanczos method for computing charge-changing QRPA strength functions in atomic nuclei. Starting from the finite-amplitude-method formulation of the QRPA line…
Neutrinoless Double-Beta Decay: A Roadmap for Matching Theory to Experiment
Vincenzo Cirigliano, Zohreh Davoudi, Wouter Dekens +16
The observation of neutrino oscillations and hence non-zero neutrino masses provided a milestone in the search for physics beyond the Standard Model. But even though we now know th…
Teddy: A System for Interactive Review Analysis
Xiong Zhang, Jonathan Engel, Sara Evensen +3
Reviews are integral to e-commerce services and products. They contain a wealth of information about the opinions and experiences of users, which can help better understand consume…
Effective Lagrangians and Parity-Conserving Time-Reversal Violation at Low Energies
Jonathan Engel, Paul H. Frampton, Roxanne P. Springer
Using effective Lagrangians, we argue that any time-reversal-violating but parity-conserving effects are too small to be observed in flavor-conserving nuclear processes without dra…
Electric dipole moments and the search for new physics
Ricardo Alarcon, Jim Alexander, Vassilis Anastassopoulos +140
Static electric dipole moments of nondegenerate systems probe mass scales for physics beyond the Standard Model well beyond those reached directly at high energy colliders. Discrim…
Nuclear Structure from the In-Medium Similarity Renormalization Group
Heiko Hergert, Jiangming Yao, Titus D. Morris +3
Efforts to describe nuclear structure and dynamics from first principles have advanced significantly in recent years. Exact methods for light nuclei are now able to include continu…
Detecting the QCD axion via the ferroaxionic force with piezoelectric materials
Asimina Arvanitaki, Jonathan Engel, Andrew A. Geraci +3
We show that piezoelectric materials can be used to source virtual QCD axions, generating a new axion-mediated force. Spontaneous parity violation within the piezoelectric crystal…
FRIB and the GW170817 Kilonova
A. Aprahamian, R. Surman, A. Frebel +45
In July 2018 an FRIB Theory Alliance program was held on the implications of GW170817 and its associated kilonova for r-process nucleosynthesis. Topics of discussion included the a…
Nuclear Matrix Elements for Double-Beta Decay
Jonathan Engel
Recent progress in nuclear-structure theory has been dramatic. I describe recent and future applications of ab initio calculations and the generator coordinate method to double-bet…
Fully self-consistent calculations of nuclear Schiff moments
Shufang Ban, Jacek Dobaczewski, Jonathan Engel +1
We calculate the Schiff moments of the nuclei 199Hg and 211Ra in completely self-consistent odd-nucleus mean-field theory by modifying the Hartree-Fock-Bogoliubov code HFODD. We al…
Neutrino-nucleus coherent scattering as a probe of neutron density distributions
Kelly Patton, Jonathan Engel, Gail C. McLaughlin +1
Neutrino-nucleus coherent elastic scattering provides a theoretically appealing way to measure the neutron part of nuclear form factors. Using an expansion of form factors into mom…
Quenching of nuclear matrix elements for decay by chiral two-body currents
Long-Jun Wang, Jonathan Engel, Jiang Ming Yao
We examine the leading effects of two-body weak currents from chiral effective field theory on the matrix elements governing neutrinoless double-beta decay. In the closure approxim…
Proton-Neutron Pairing Amplitude as a Generator Coordinate for Double-Beta Decay
Nobuo Hinohara, Jonathan Engel
We treat proton-neutron pairing amplitudes, in addition to the nuclear deformation, as generator coordinates in a calculation of the neutrinoless double-beta decay of 76Ge. We work…
Anatomy of nuclear matrix elements for neutrinoless double-beta decay
Fedor Simkovic, Amand Faessler, Vadim Rodin +2
We show that, within the Quasiparticle Random Phase Approximation (QRPA) and the renormalized QRPA (RQRPA) based on the Bonn CD nucleon-nucleon interaction, the competition between…
Nuclear Schiff Moments and CP Violation
Jonathan Engel
This paper reviews the calculation of nuclear Schiff moments, which one must know in order to interpret experiments that search for time-reversal-violating electric dipole moments…
Isovector Pairing in Odd-A Proton-Rich Nuclei
Jonathan Engel, Karlheinz Langanke, Petr Vogel
A simple model based on the group SO(5) suggests that both the like-particle and neutron-proton components of isovector pairing correlations in odd-A nuclei are Pauli blocked. The…
Effects of Quasiparticle-Vibration Coupling on Gamow-Teller Strength and Decay with the Skyrme Proton-Neutron Finite-Amplitude Method
Qunqun Liu, Jonathan Engel, Nobuo Hinohara +1
We adapt the proton-neutron finite-amplitude method, which in its original form is an efficient implementation of the Skyrme quasiparticle random phase approximation, to include th…
Global calculation of two-neutrino double- decay within the finite amplitude method in nuclear density functional theory
Nobuo Hinohara, Jonathan Engel
Two-neutrino double-beta () decay has been used to constrain the neutron-proton part of effective interactions, which in turn is used to compute the nuclear matrix element…
Computational Nuclear Quantum Many-Body Problem: The UNEDF Project
Scott Bogner, Aurel Bulgac, Joseph A. Carlson +28
The UNEDF project was a large-scale collaborative effort that applied high-performance computing to the nuclear quantum many-body problem. UNEDF demonstrated that close association…
Electric Dipole Moments of Nucleons, Nuclei, and Atoms: The Standard Model and Beyond
Jonathan Engel, Michael J. Ramsey-Musolf, U. van Kolck
Searches for the permanent electric dipole moments (EDMs) of molecules, atoms, nucleons and nuclei provide powerful probes of CP violation both within and beyond the Standard Model…
Neutrino capture by r-process waiting-point nuclei
Rebecca Surman, Jonathan Engel
We use the Quasiparticle Random Phase Approximation to include the effects of low-lying Gamow-Teller and first forbidden strength in neutrino capture by very neutron-rich nuclei wi…
Double Beta Decay, Majorana Neutrinos, and Neutrino Mass
Frank T. Avignone, Steven R. Elliott, Jonathan Engel
The theoretical and experimental issues relevant to neutrinoless double-beta decay are reviewed. The impact that a direct observation of this exotic process would have on elementar…