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Title: Uncertainties in ab initio nuclear structure calculations with chiral interactions

Abstract

We present theoretical ground state energies and their uncertainties for p -shell nuclei obtained from chiral effective field theory internucleon interactions as a function of chiral order, fitted to two- and three-body data only. We apply a Similary Renormalization Group transformation to improve the numerical convergence of the many-body calculations, and discuss both the numerical uncertainties arising from basis truncations and those from omitted induced many-body forces, as well as chiral truncation uncertainties. With complete Next-to-Next-to-Leading (N 2 LO) order two- and three-body interactions, we find significant overbinding for the ground states in the upper p -shell, but using higher-order two-body potentials, in combination with N 2 LO three-body forces, our predictions agree with experiment throughout the p -shell to within our combined estimated uncertainties. The uncertainties due to chiral order truncation are noticeably larger than the numerical uncertainties, but they are expected to become comparable to the numerical uncertainties at complete N 3 LO.

Authors:
; ; ; ;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1961919
Grant/Contract Number:  
FG02-87ER40371 DE-SC0018223 DE-SC0023495 DE-AC02-05CH11231 DE-AC02-06CH11357
Resource Type:
Published Article
Journal Name:
Frontiers in Physics
Additional Journal Information:
Journal Name: Frontiers in Physics Journal Volume: 11; Journal ID: ISSN 2296-424X
Publisher:
Frontiers Media SA
Country of Publication:
Switzerland
Language:
English

Citation Formats

Maris, P., Le, H., Nogga, A., Roth, R., and Vary, J. P. Uncertainties in ab initio nuclear structure calculations with chiral interactions. Switzerland: N. p., 2023. Web. doi:10.3389/fphy.2023.1098262.
Maris, P., Le, H., Nogga, A., Roth, R., & Vary, J. P. Uncertainties in ab initio nuclear structure calculations with chiral interactions. Switzerland. https://doi.org/10.3389/fphy.2023.1098262
Maris, P., Le, H., Nogga, A., Roth, R., and Vary, J. P. Thu . "Uncertainties in ab initio nuclear structure calculations with chiral interactions". Switzerland. https://doi.org/10.3389/fphy.2023.1098262.
@article{osti_1961919,
title = {Uncertainties in ab initio nuclear structure calculations with chiral interactions},
author = {Maris, P. and Le, H. and Nogga, A. and Roth, R. and Vary, J. P.},
abstractNote = {We present theoretical ground state energies and their uncertainties for p -shell nuclei obtained from chiral effective field theory internucleon interactions as a function of chiral order, fitted to two- and three-body data only. We apply a Similary Renormalization Group transformation to improve the numerical convergence of the many-body calculations, and discuss both the numerical uncertainties arising from basis truncations and those from omitted induced many-body forces, as well as chiral truncation uncertainties. With complete Next-to-Next-to-Leading (N 2 LO) order two- and three-body interactions, we find significant overbinding for the ground states in the upper p -shell, but using higher-order two-body potentials, in combination with N 2 LO three-body forces, our predictions agree with experiment throughout the p -shell to within our combined estimated uncertainties. The uncertainties due to chiral order truncation are noticeably larger than the numerical uncertainties, but they are expected to become comparable to the numerical uncertainties at complete N 3 LO.},
doi = {10.3389/fphy.2023.1098262},
journal = {Frontiers in Physics},
number = ,
volume = 11,
place = {Switzerland},
year = {Thu Mar 16 00:00:00 EDT 2023},
month = {Thu Mar 16 00:00:00 EDT 2023}
}

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