# Publications

## 2022

Model reduction methods for nuclear emulators, Jordan Melendez, Christian Drischler, Dick Furnstahl, Alberto Garcia, and Xilin Zhang, J. Phys. G: Nucl. Part. Phys. 49 102001 (2022), arXiv:2203.05528.

The field of model order reduction (MOR) is growing in importance due to its ability to extract the key insights from complex simulations while discarding co...

Chapter 'Fast emulation of quantum three-body scattering' in 'Nuclear Forces for Precision Nuclear Physics: A Collection of Perspectives', Christian Drischler and Xilin Zhang, Few-Body Systems 63, 67 (2022), arXiv:2202.01105.

In this contribution we briefly recapitulate the progress made in constructing fast and accurate emulators for few-body scattering and reaction observables b...

## 2021

Gaussian process error modeling for chiral effective-field-theory calculations of $np \leftrightarrow d \gamma$ at low energies, Bijaya Acharya and Sonia Bacca, Phys. Lett. B 827, 137011, arXiv:2109.13972.

We calculate the energy-dependent cross section of the $np \leftrightarrow d\gamma$ process in chiral effective field theory and apply state-of-the-art tools...

Fast emulation of quantum three-body scattering, Xilin Zhang and Dick Furnstahl, Phys. Rev. C 105, 064004, arXiv:2110.04269.

We develop a class of emulators for solving quantum three-body scattering problems. They are based on combining the variational method for scattering observa...

Fast & accurate emulation of two-body scattering observables without wave functions, Jordan Melendez, Christian Drischler, Alberto Garcia, Dick Furnstahl, and Xilin Zhang, Phys. Lett. B 821, 136608 (2021), arXiv:2106.15608.

We combine Newton’s variational method with ideas from eigenvector continuation to construct a fast & accurate emulator for two-body scattering observabl...

Rigorous constraints on three-nucleon forces in chiral effective field theory from fast and accurate calculations of few-body observables, Sarah Wesolowski, Isak Svensson, Andreas Ekström, Christian Forssén, Dick Furnstahl, Jordan Melendez, Daniel Phillips, Phys. Rev. C 104, 064001 (2021), arXiv:2104.04441. [notebooks]

We explore the constraints on the three-nucleon force (3NF) of chiral effective field theory ($\chi$EFT) that are provided by bound-state observables in the ...

## 2020

Efficient emulators for scattering using eigenvector continuation, Dick Furnstahl, Alberto Garcia, Patrick Millican, and Xilin Zhang, Phys. Lett. B 809, 135719 (2020), arXiv:2007.03635. [notebooks]

Eigenvector continuation (EC) has been shown to accurately and efficiently reproduce ground states for targeted sets of Hamiltonian parameters. It uses as va...

Effective Field Theory Truncation Errors and Why They Matter, Jordan Melendez, PhD Thesis at OhioLINK,

All models are wrong, but some are useful. Still fewer are wrong in a way that is useful. This thesis shows that effective field theories (EFTs) are not only...

Ab initio calculations of low-energy nuclear scattering using a generalized Lüscher method, Xilin Zhang, Ragnar Stroberg, Petr Navratil, Chan Gwak, Jordan Melendez, Dick Furnstahl, and Jason Holt, Phys. Rev. Lett. 125, 112503 (2020), arXiv:2004.13575.

The Lüscher method in Lattice QCD was recently generalized to enable low-energy nuclear scattering results to be extracted from the discrete energy levels ...

Designing Optimal Experiments: An Application to Proton Compton Scattering, Jordan Melendez, Dick Furnstahl, Harald Grießhammer, Judith McGovern, Daniel Phillips, and M.T. Pratola, Eur. Phys. J 57, 81, arXiv:2004.11307. [notebooks]

Interpreting measurements requires a physical theory, but the theory’s accuracy may vary across the experimental domain. To optimize experimental design, and...

Quantifying uncertainties and correlations in the nuclear-matter equation of state, Christian Drischler, Jordan Melendez, Dick Furnstahl, and Daniel Phillips, Phys. Rev. C 102, 054315 (2020), arXiv:2004.07805. [notebooks]

We perform statistically rigorous uncertainty quantification (UQ) for chiral effective field theory ($\chi$EFT) applied to infinite nuclear matter up to twic...

How well do we know the neutron-matter equation of state at the densities inside neutron stars? A Bayesian approach with correlated uncertainties, Christian Drischler, Dick Furnstahl, Jordan Melendez, and Daniel Phillips, Phys. Rev. Lett. 125, 202702 (2020), arXiv:2004.07232. [notebooks]

We introduce a new framework for quantifying correlated uncertainties of the infinite-matter equation of state (EOS) derived from chiral effective field theo...

## 2019

S-factor and scattering-parameter extractions from He-3 + He-4 -> Be-7 + gamma, Xilin Zhang, Kenneth M. Nollett, and D. R. Phillips, J. Phys. G 47, 054002 (2020), arXiv:1909.07287.

Previous studies of the reaction ${}^3{\rm He} + {}^4{\rm He} \rightarrow {}^7{\rm Be} + \gamma$ have mainly focused on providing the best central value an...

Quantifying correlated truncation errors in effective field theory, Jordan Melendez, Dick Furnstahl, Daniel Phillips, Matt Pratola, and Sarah Wesolowski, Phys. Rev. C 100, 044001 (2019), arXiv:1904.10581. [notebooks]

Effective field theories (EFTs) organize the description of complex systems into an infinite sequence of decreasing importance. Predictions are made with a f...

Exploring Bayesian parameter estimation for chiral effective field theory using nucleon-nucleon phase shifts, Sarah Wesolowski, Dick Furnstahl, Jordan Melendez, and Daniel Phillips, J. Phys. G 46, 045102 (2019), arXiv:1808.08211.

We recently developed a Bayesian framework for parameter estimation in general effective field theories. Here we present selected results from using that fra...

## 2017

Bayesian truncation errors in chiral effective field theory: Nucleon-nucleon observables, Jordan Melendez, Sarah Wesolowski, and Dick Furnstahl, Phys. Rev. C 96, 024003 (2017), arXiv:1704.03308.

Chiral effective field theory (EFT) predictions are necessarily truncated at some order in the EFT expansion, which induces an error that must be quantified ...

## 2016

Bayesian parameter estimation for effective field theories, Sarah Wesolowski, Natalie Klco, Dick Furnstahl, Daniel Phillips, and A. Thapaliya, J. Phys. G 43, 074001 (2016), arXiv:1511.03618.

We present procedures based on Bayesian statistics for estimating, from data, the parameters of effective field theories (EFTs). The extraction of low-energy...

## 2015

Quantifying truncation errors in effective field theory, Dick Furnstahl, Natalie Klco, Daniel Phillips, and Sarah Wesolowski, Phys. Rev. C 92, 024005 (2015), arXiv:1506.01343.

Bayesian procedures designed to quantify truncation errors in perturbative calculations of quantum chromodynamics observables are adapted to expansions in ef...

A recipe for EFT uncertainty quantification in nuclear physics, Dick Furnstahl, Daniel Phillips, and Sarah Wesolowski, J. Phys. G 42, 034028 (2015), arXiv:1407.0657.

The application of effective field theory (EFT) methods to nuclear systems provides the opportunity to rigorously estimate the uncertainties originating in t...