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Bayesian prediction...
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Djärv, Tor,1991Chalmers tekniska högskola,Chalmers University of Technology
(författare)
Bayesian predictions for A=6 nuclei using eigenvector continuation emulators
- Artikel/kapitelEngelska2022
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2022
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LIBRIS-ID:oai:research.chalmers.se:e0dcb9b9-beba-4c49-827a-4183408d34b4
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https://research.chalmers.se/publication/528740URI
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https://doi.org/10.1103/PhysRevC.105.014005DOI
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Språk:engelska
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Sammanfattning på:engelska
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We make ab initio predictions for the A=6 nuclear level scheme based on two- and three-nucleon interactions up to next-to-next-to-leading order in chiral effective field theory (χEFT). We utilize eigenvector continuation and Bayesian methods to quantify uncertainties stemming from the many-body method, the χEFT truncation, and the low-energy constants of the nuclear interaction. The construction and validation of emulators is made possible via the development of jupiterncsm - a new M-scheme no-core shell model code that uses on-the-fly Hamiltonian matrix construction for efficient, single-node computations up to Nmax=10 for Li6. We find a slight underbinding of He6 and Li6, although consistent with experimental data given our theoretical error bars. As a result of incorporating correlated χEFT-truncation errors we find more precise predictions (smaller error bars) for separation energies: Sd(Li6)=0.89±0.44MeV, S2n(He6)=0.20±0.60MeV, and for the beta decay Q value: Qβ-(He6)=3.71±0.65MeV. We conclude that our error bars can potentially be reduced further by extending the model space used by jupiterncsm.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Ekström, Andreas,1980Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)andeks
(författare)
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Forssén, Christian,1974Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)f2bcf
(författare)
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Johansson, Håkan T,1977Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)f96hajo
(författare)
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Chalmers tekniska högskola
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Physical Review C105:12469-99852469-9993
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