361 citations · 2.6k across the 81 of their papers we have counts for
70 papers · 1 filter
Improved nuclear-structure corrections to the hyperfine splitting of electronic and muonic deuterium
Jose Bonilla, Thomas R. Richardson, Sonia Bacca +2
We calculate the nuclear-structure correction to the hyperfine splitting in both electronic and muonic deuterium using interactions from chiral effective field theory. We explore t…
Magnetic dipole operator from chiral effective field theory for many-body expansion methods
R. Seutin, O. J. Hernandez, T. Miyagi +4
Many-body approaches for atomic nuclei generally rely on a basis expansion of the nuclear states, interactions, and current operators. In this work, we derive the representation of…
Muonic-Atom Spectroscopy and Impact on Nuclear Structure and Precision QED Theory
Aldo Antognini, Sonia Bacca, Andreas Fleischmann +10
Recent progress in laser and x-ray spectroscopy of muonic atoms offers promising long-term possibilities at the intersection of atomic, nuclear and particle physics. In muonic hydr…
Uncertainty quantification in electromagnetic observables of nuclei
Bijaya Acharya, Sonia Bacca, Francesca Bonaiti +2
We present strategies to quantify theoretical uncertainties in modern ab-initio calculations of electromagnetic observables in light and medium-mass nuclei. We discuss how uncertai…
Spectral function for He using the Chebyshev expansion in coupled-cluster theory
J. E. Sobczyk, S. Bacca, G. Hagen +1
We compute spectral function for He by combining coupled-cluster theory with an expansion of integral transforms into Chebyshev polynomials. Our method allows to estimate the u…
Bayesian analysis of nuclear polarizability corrections to the Lamb shift of muonic H-atoms and He-ions
Simone Salvatore Li Muli, Bijaya Acharya, Oscar Javier Hernandez +1
The extraction of nuclear charge radii from spectroscopy experiments in muonic atoms is currently limited by the large uncertainties associated with the theoretical evaluation of t…
Removing center of mass effects in response function and sum rule calculations based on the harmonic oscillator basis
K. Akdogan, D. Layh, I. Weinberger +3
Response functions are at the heart of any comparison of theory with experiment in studies of the nuclear dynamics with electroweak probes. Calculations performed in the laboratory…
Gaussian process error modeling for chiral effective-field-theory calculations of at low energies
Bijaya Acharya, Sonia Bacca
We calculate the energy-dependent cross section of the process in chiral effective field theory and apply state-of-the-art tools for quantification of theory…
Ab initio computation of the longitudinal response function in Ca
J. E. Sobczyk, B. Acharya, S. Bacca +1
We present a consistent \emph{ab initio} computation of the longitudinal response function in Ca using the coupled-cluster and Lorentz integral transform methods start…
Implementation of local chiral interactions in the hyperspherical harmonics formalism
Simone Salvatore Li Muli, Sonia Bacca, Nir Barnea
With the goal of using chiral interactions at various orders to explore properties of the few-body nuclear systems, we write the recently developed local chiral interactions as sph…
Dispersive evaluation of the Lamb shift in muonic deuterium from chiral effective field theory
Bijaya Acharya, Vadim Lensky, Sonia Bacca +2
We merge the dispersive relation approach and the ab initio method to compute nuclear structure corrections to the Lamb shift in muonic deuterium. We calculate the deuteron respons…
Benchmark calculations of electromagnetic sum rules with a symmetry-adapted basis and hyperspherical harmonics
R. B. Baker, K. D. Launey, S. Bacca +2
We demonstrate the ability to calculate electromagnetic sum rules with the \textit{ab initio} symmetry-adapted no-core shell model. By implementing the Lanczos algorithm, we comput…
From bound states to the continuum
Calvin W. Johnson, Kristina D. Launey, Naftali Auerbach +35
This white paper reports on the discussions of the 2018 Facility for Rare Isotope Beams Theory Alliance (FRIB-TA) topical program "From bound states to the continuum: Connecting bo…
Neutrino-deuteron scattering: Uncertainty quantification and new constraints
Bijaya Acharya, Sonia Bacca
We study neutral- and charged-current (anti)neutrino-induced dissociation of the deuteron at energies from threshold up to 150 MeV by employing potentials, as well as one- and two-…
Muonic Lithium atoms: nuclear structure corrections to the Lamb shift
S. Li Muli, A. Poggialini, S. Bacca
In view of the future plans to measure the Lamb shift in muonic Lithium atoms we address the microscopic theory of the -Li and -Li systems. The goal of…
Probing uncertainties of nuclear structure corrections in light muonic atoms
Oscar Javier Hernandez, Chen Ji, Sonia Bacca +1
Recent calculations of nuclear structure corrections to the Lamb shift in light muonic atoms are based on an expansion in a parameter eta, where only terms up to second order are r…
Coherent elastic neutrino-nucleus scattering on 40Ar from first principles
C. G. Payne, S. Bacca, G. Hagen +2
Coherent elastic neutrino scattering on the 40Ar nucleus is computed with coupled-cluster theory based on nuclear Hamiltonians inspired by effective field theories of quantum chrom…
First principles electromagnetic responses in medium-mass nuclei
Johannes Simonis, Sonia Bacca, Gaute Hagen
We review the recent progress made in the computation of electromagnetic response functions in light and medium-mass nuclei using coupled-cluster theory. We show how a many-body fo…
A statistical analysis of the nuclear structure uncertainties in D
Oscar J. Hernandez, Sonia Bacca, Nir Barnea +3
The charge radius of the deuteron (D), was recently determined to three times the precision compared with previous measurements using the measured Lamb shift in muonic deuterium (m…
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…
Electromagnetic Excitations and Responses in Nuclei from First Principles
R. B. Baker, K. D. Launey, N. Nevo Dinur +3
We discuss the role of clustering on monopole, dipole, and quadrupole excitations in nuclei in the framework of the ab initio symmetry-adapted no-core shell model (SA-NCSM). The SA…
Ab initio calculation of nuclear structure corrections in muonic atoms
Chen Ji, Sonia Bacca, Nir Barnea +2
The measurement of the Lamb shift in muonic hydrogen and the subsequent emergence of the proton-radius puzzle have motivated an experimental campaign devoted to measuring the Lamb…
Computing the dipole polarizability of 48Ca with increased precision
Mirko Miorelli, Sonia Bacca, Gaute Hagen +1
We compute the electric dipole polarizability of 48Ca with an increased precision by including more correlations than in previous studies. Employing the coupled-cluster method we g…
Recent developments in nuclear structure theory: an outlook on the muonic atom program
Oscar Javier Hernandez, Sonia Bacca, Kyle Andrew Wendt
The discovery of the proton-radius puzzle and the subsequent deuteron-radius puzzle is fueling an on-going debate on possible explanations for the difference in the observed radii…