Publications (44)
Electromagnetic two-body currents of one- and two-pion range
S. Pastore, R. Schiavilla, J. L. Goity
Nuclear electromagnetic currents are derived in time-ordered perturbation theory within an effective-field-theory framework including explicit nucleons, isobars, and pions up…
Charge-symmetry breaking forces and isospin mixing in 8Be
R. B. Wiringa, S. Pastore, Steven C. Pieper +1
We report Green's function Monte Carlo calculations of isospin-mixing (IM) matrix elements for the 2+, 1+, and 3+ T=0,1 pairs of states at 16--19 MeV excitation in 8Be. The realist…
Electromagnetic transition from the 4 to 2 resonance in Be measured via the radiative capture in He+He
V. M. Datar, D. R. Chakrabarty, Suresh Kumar +15
An earlier measurement on the 4 to 2 radiative transition in Be provided the first electromagnetic signature of its dumbbell-like shape. However, the large uncertainty…
Electron Scattering and Neutrino Physics
A. M. Ankowski, A. Ashkenazi, S. Bacca +50
A thorough understanding of neutrino-nucleus scattering physics is crucial for the successful execution of the entire US neutrino physics program. Neutrino-nucleus interaction cons…
Local chiral interactions and magnetic structure of few-nucleon systems
R. Schiavilla, A. Baroni, S. Pastore +8
The magnetic form factors of H, H, and He, deuteron photodisintegration cross sections at low energies, and deuteron threshold electrodisintegration cross sections at b…
Quantum Monte Carlo calculations of magnetic moments and M1 transitions in nuclei
S. Pastore, Steven C. Pieper, R. Schiavilla +1
We present Quantum Monte Carlo calculations of magnetic moments and M1 transitions in nuclei which take into account contributions of two-body electromagnetic currents. Th…
Fundamental Symmetries, Neutrons, and Neutrinos (FSNN): Whitepaper for the 2023 NSAC Long Range Plan
B. Acharya, C. Adams, A. A. Aleksandrova +176
This whitepaper presents the research priorities decided on by attendees of the 2022 Town Meeting for Fundamental Symmetries, Neutrons and Neutrinos, which took place December 13-1…
The two-nucleon electromagnetic charge operator in chiral effective field theory (EFT) up to one loop
S. Pastore, L. Girlanda, R. Schiavilla +1
The electromagnetic charge operator in a two-nucleon system is derived in chiral effective field theory (EFT) up to order (or N4LO), where denotes the low-momentum…
Electromagnetic structure of A=2 and 3 nuclei in chiral effective field theory
M. Piarulli, L. Girlanda, L. E. Marcucci +3
The objectives of the present work are twofold. The first is to address and resolve some of the differences present in independent, chiral-effective-field-theory (\chiEFT) derivati…
Present Status of Nuclear Shell-Model Calculations of Neutrinoless Double-Beta Decay Matrix Elements
L. Coraggio, N. Itaco, G. De Gregorio +3
Neutrinoless double beta decay searches are currently among the major foci of experimental physics. The observation of such a decay will have important implications in our understa…
The muon capture rate on hydrogen and the values of and
S. Pastore, F. Myhrer, K. Kubodera
Motivated by the recent developments in the determination of the experimental values of the nucleon axial-vector coupling constant and the pion-nucleon coupling constant $g_{…
Electromagnetic radii of light nuclei from variational Monte Carlo calculations
G. B. King, G. Chambers-Wall, A. Gnech +3
We present variational Monte Carlo calculations of charge and magnetic radii in nuclei. The calculations are based on the Norfolk two- and three-nucleon interactions, an…
Fundamental Neutron Physics: a White Paper on Progress and Prospects in the US
R. Alarcon, A. Aleksandrova, S. BaeÃler +88
Fundamental neutron physics, combining precision measurements and theory, probes particle physics at short range with reach well beyond the highest energies probed by the LHC. Sign…
Zemach moments and radii of 2,3H and 3,4He
N. Nevo Dinur, O. J. Hernandez, S. Bacca +5
We present benchmark calculations of Zemach moments and radii of 2,3H and 3,4He using various few-body methods. Zemach moments are required to interpret muonic atom data measured b…
Comparison between Variational Monte Carlo and Shell Model Calculations of Neutrinoless Double Beta Decay Matrix Elements in Light Nuclei
X. B. Wang, A. C. Hayes, J. Carlson +4
Benchmark comparisons between many-body methods are performed to assess the ingredients necessary for an accurate calculation of neutrinoless double beta decay matrix elements. She…
Towards Precise and Accurate Calculations of Neutrinoless Double-Beta Decay: Project Scoping Workshop Report
V. Cirigliano, Z. Davoudi, J. Engel +20
We present the results of a National Science Foundation (NSF) Project Scoping Workshop, the purpose of which was to assess the current status of calculations for the nuclear matrix…
GFMC calculations of electromagnetic moments and M1 transitions in nuclei
S. Pastore, Steven C. Pieper, R. Schiavilla +1
We present recent Green's function Monte Carlo calculations of magnetic moments and M1 transitions in nuclei, which include corrections arising from two-body meson-excha…
Densities and momentum distributions in A <=12 nuclei from chiral effective field theory interactions
M. Piarulli, S. Pastore, R. B. Wiringa +2
Current and future electron and neutrino scattering experiments will be greatly aided by a better understanding of the role played by short-range correlations in nuclei. Two-body p…
A new leading contribution to neutrinoless double-beta decay
V. Cirigliano, W. Dekens, J. de Vries +4
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 neutr…
Thermal neutron captures on and He
L. Girlanda, A. Kievsky, L. E. Marcucci +3
We report on a study of the and He radiative captures at thermal neutron energies, using wave functions obtained from either chiral or conventional two- and three-nucle…
Scaling in the short-time approximation
S. Pastore, J. Carlson, S. Gandolfi +2
We briefly review the concept of scaling and how it occurs in quasielastic electron and neutrino scattering from nuclei, and then the particular approach to scaling in the short-ti…
Electromagnetic Currents and Magnetic Moments in EFT
S. Pastore, L. Girlanda, R. Schiavilla +2
A two-nucleon potential and consistent electromagnetic currents are derived in chiral effective field theory (EFT) at, respectively, (or NLO) and (or NLO)…
Quantum Monte Carlo calculations of magnetic form factors in light nuclei
G. Chambers-Wall, A. Gnech, G. B. King +4
We present Quantum Monte Carlo calculations of magnetic form factors in nuclei, based on Norfolk two- and three-nucleon interactions, and associated one- and two-body elec…
Partial muon capture rates in and nuclei with chiral effective field theory
G. B. King, S. Pastore, M. Piarulli +1
Searches for neutrinoless-double beta decay rates are crucial in addressing questions within fundamental symmetries and neutrino physics. The rates of these decays depend not only…
Magnetic structure of nuclei using the Norfolk nuclear models with quantum Monte Carlo methods
G. Chambers-Wall, A. Gnech, G. B. King +4
We present Quantum Monte Carlo calculations of magnetic moments, form factors, and densities of nuclei within a chiral effective field theory approach. We use the Norfolk…
Nuclear decay as a probe for physics beyond the Standard Model
M. Brodeur, N. Buzinsky, M. A. Caprio +43
This white paper was submitted to the 2022 Fundamental Symmetries, Neutrons, and Neutrinos (FSNN) Town Hall Meeting in preparation for the next NSAC Long Range Plan. We advocate to…
Snowmass Theory Frontier Report
N. Craig, C. Csáki, A. X. El-Khadra +38
This report summarizes the recent progress and promising future directions in theoretical high-energy physics (HEP) identified within the Theory Frontier of the 2021 Snowmass Proce…
Local chiral interactions, the tritium Gamow-Teller matrix element, and the three-nucleon contact term
A. Baroni, R. Schiavilla, L. E. Marcucci +8
The Gamow-Teller (GT) matrix element contributing to tritium decay is calculated with trinucleon wave functions obtained from hyperspherical-harmonics solutions of the Schröd…
Quantum Monte Carlo calculations of electromagnetic transitions in 8Be with meson-exchange currents derived from chiral effective field theory
S. Pastore, R. B. Wiringa, Steven C. Pieper +1
We report quantum Monte Carlo calculations of electromagnetic transitions in 8Be. The realistic Argonne v18 two-nucleon and Illinois-7 three-nucleon potentials are used to generate…
Chiral Effective Field Theory Calculations of Weak Transitions in Light Nuclei
G. B. King, L. Andreoli, S. Pastore +5
We report Quantum Monte Carlo calculations of weak transitions in nuclei, based on the Norfolk two- and three-nucleon chiral interactions, and associated one- and two-bo…
Nuclear Axial Currents in Chiral Effective Field Theory
A. Baroni, L. Girlanda, S. Pastore +2
Two-nucleon axial charge and current operators are derived in chiral effective field theory up to one loop. The derivation is based on time-ordered perturbation theory, and account…
Quantum Monte Carlo calculations of weak transitions in =6--10 nuclei
S. Pastore, A. Baroni, J. Carlson +4
Ab initio calculations of the Gamow-Teller (GT) matrix elements in the decays of He and C and electron captures in Be are carried out using both variational and…
Neutrinoless double beta decay matrix elements in light nuclei
S. Pastore, J. Carlson, V. Cirigliano +3
We present the first ab initio calculations of neutrinoless double beta decay matrix elements in - nuclei using Variational Monte Carlo wave functions obtained from the Ar…
Electromagnetic Structure and Reactions of Few-Nucleon Systems in EFT
L. Girlanda, S. Pastore, R. Schiavilla +1
We summarize our recent work dealing with the construction of the nucleon-nucleon potential and associated electromagnetic currents up to one loop in chiral effective field theory…
Bridging the Virtual Observatory and the GRID with the query element
G. Taffoni, E. Ambrodsi, C. Vuerli +8
The current generation of Grid infrastructures designed for production activity is strongly computing oriented and tuned on the needs of applications that requires intensive comput…
Theoretical tools for neutrino scattering: interplay between lattice QCD, EFTs, nuclear physics, phenomenology, and neutrino event generators
L. Alvarez Ruso, A. M. Ankowski, S. Bacca +58
Maximizing the discovery potential of increasingly precise neutrino experiments will require an improved theoretical understanding of neutrino-nucleus cross sections over a wide ra…
A renormalized approach to neutrinoless double-beta decay
V. Cirigliano, W. Dekens, J. de Vries +6
The process at the heart of neutrinoless double-beta decay, induced by a light Majorana neutrino, is investigated in pionless and chiral effective fi…
Electromagnetic processes in a EFT framework
L. Girlanda, S. Pastore, R. Schiavilla +1
Recently, we have derived a two--nucleon potential and consistent nuclear electromagnetic currents in chiral effective field theory with pions and nucleons as explicit degrees of f…
Relativity constraints on the two-nucleon contact interaction
L. Girlanda, S. Pastore, R. Schiavilla +1
We construct the most general, relativistically invariant, contact Lagrangian at order Q^2 in the power counting, Q denoting the low momentum scale. A complete, but non-minimal, se…
Electromagnetic Processes in EFT
S. Pastore, R. Schiavilla, J. L. Goity
Nuclear electromagnetic currents derived in a chiral-effective-field-theory framework including explicit nucleons, isobars, and pions up to NLO, {\it i.e.} ignoring loop c…
Quantum Monte Carlo calculations of electromagnetic moments and transitions in A <= 9 nuclei with meson-exchange currents derived from chiral effective field theory
S. Pastore, Steven C. Pieper, R. Schiavilla +1
Quantum Monte Carlo calculations of electromagnetic moments and transitions are reported for A <= 9 nuclei. The realistic Argonne v18 two-nucleon and Illinois-7 three-nucleon poten…
An update of muon capture on hydrogen
S. Pastore, F. Myhrer, K. Kubodera
The successful precision measurement of the rate of muon capture on a proton by the MuCap Collaboration allows for a stringent test of the current theoretical understanding of this…
Bayesian analysis of nucleon-nucleon scattering data in pionless effective field theory
J. M. Bub, M. Piarulli, R. J. Furnstahl +2
We perform Bayesian model calibration of two-nucleon () low-energy constants (LECs) appearing in an interaction based on pionless effective field theory (EFT). The calibra…
Longitudinal form factors of nuclei in a chiral effective field theory approach
G. B. King, G. Chambers-Wall, A. Gnech +3
In this work, we present the elastic electron scattering longitudinal form factors of nuclei computed in a variational Monte Carlo approach. We employ the Norfolk family…