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Rigorous constraint...
Rigorous constraints on three-nucleon forces in chiral effective field theory from fast and accurate calculations of few-body observables
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- Wesolowski, S. (författare)
- Salisbury University
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- Svensson, Isak, 1988 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Ekström, Andreas, 1980 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Forssén, Christian, 1974 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Furnstahl, R. J. (författare)
- Ohio State University
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- Melendez, J. A. (författare)
- Ohio State University
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- Phillips, D. R. (författare)
- Ohio University,Technische Universität Darmstadt,Helmholtz Zentrum,Helmholtz Center
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(creator_code:org_t)
- 2021
- 2021
- Engelska.
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Ingår i: Physical Review C. - 2469-9985 .- 2469-9993. ; 104:6
- Relaterad länk:
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We explore the constraints on the three-nucleon force (3NF) of chiral effective field theory (χEFT) that are provided by bound-state observables in the A=3 and A=4 sectors. Our statistically rigorous analysis incorporates experimental error, computational method uncertainty, and the uncertainty due to truncation of the χEFT expansion at next-to-next-to-leading order. A consistent solution for the H3 binding energy, the He4 binding energy and radius, and the H3β-decay rate can only be obtained if χEFT truncation errors are included in the analysis. The β-decay rate is the only one of these that yields a nondegenerate constraint on the 3NF low-energy constants, which makes it crucial for the parameter estimation. We use eigenvector continuation for fast and accurate emulation of no-core shell model calculations of the few-nucleon observables. This facilitates sampling of the posterior probability distribution, allowing us to also determine the distributions of the parameters that quantify the truncation error. We find a χEFT expansion parameter of Q=0.33±0.06 for these observables.
Ämnesord
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
- NATURVETENSKAP -- Kemi -- Teoretisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Theoretical Chemistry (hsv//eng)
- NATURVETENSKAP -- Matematik -- Sannolikhetsteori och statistik (hsv//swe)
- NATURAL SCIENCES -- Mathematics -- Probability Theory and Statistics (hsv//eng)
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- ref (ämneskategori)
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