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NSR database version of April 11, 2024.

Search: Author = R.Wirth

Found 13 matches.

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2023ZA03      Eur.Phys.J. A 59, 95 (2023)

A.Zare, R.Wirth, C.A.Haselby, H.Hergert, M.Iwen

Modewise Johnson-Lindenstrauss embeddings for nuclear many-body theory

doi: 10.1140/epja/s10050-023-00999-5
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2022YA19      Phys.Rev. C 106, 014315 (2022)

J.M.Yao, I.Ginnett, A.Belley, T.Miyagi, R.Wirth, S.Bogner, J.Engel, H.Hergert, J.D.Holt, S.R.Stroberg

Ab initio studies of the double-Gamow-Teller transition and its correlation with neutrinoless double-β decay

RADIOACTIVITY 6,8He, 10Be, 14C, 18,22O, 22Ne, 26,28Mg, 30Si, 34S, 38Ar, 42,44,48,56Ca, 50Cr, 46,52Ti(2β-); A=6-76(2β-); calculated nuclear matrix elements (NMEs) for ground-state-to-ground-state double Gamow-Teller transitions (DGT) and Gamow Teller (GT) 0νββ decay, transition densities of parent nuclei, correlation between the transition densities and NMEs of DGT transitions. Ab initio many body methods by importance-truncated no-core shell model (IT-NCSM) with GXPF1A interaction, valence-space in-medium similarity renormalization group method (VSIMSRG) with EM1.8/2.0 interaction, and in-medium generator coordinate method (IM-GCM). 6He, 10Be, 14C, 18O, 22Ne, 26Mg, 30Si, 34S, 38Ar, 42,44Ca, 46Ti, 50Cr; 2β- decay mode forbidden for these nuclei due to negative Q values, however, on query, authors mentioned that these nuclei were included for NMEs for 0νββ decays as these involved the same decay operators that determine the allowed decay rates, thus helpful to benchmark many-body approaches for the nuclear matrix elements of neutrinoless double beta decay.

doi: 10.1103/PhysRevC.106.014315
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2021WI16      Phys.Rev.Lett. 127, 242502 (2021)

R.Wirth, J.M.Yao, H.Hergert

Ab Initio Calculation of the Contact Operator Contribution in the Standard Mechanism for Neutrinoless Double Beta Decay

RADIOACTIVITY 6,8He, 48Ca(2β-); calculated the contribution of the leading-order contact transition operator to the nuclear matrix element(NME) of neutrinoless double-beta decay assuming a light Majorana neutrino-exchange mechanism.

doi: 10.1103/PhysRevLett.127.242502
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2021YA03      Phys.Rev. C 103, 014315 (2021)

J.M.Yao, A.Belley, R.Wirth, T.Miyagi, C.G.Payne, S.R.Stroberg, H.Hergert, J.D.Holt

Ab initio benchmarks of neutrinoless double-β decay in light nuclei with a chiral Hamiltonian

RADIOACTIVITY 6,8He, 10Be, 14C, 22O(2β-); calculated nuclear matrix elements (NMEs) for isospin-conserving and isospin-changing 0νββ decay modes. Valence-space in-medium similarity renormalization group (VS-IMSRG) and importance-truncated no-core shell model (IT-NCSM) calculations. Comparison with results of calculations using NCSM and coupled-cluster theory with singles and doubles plus leading-order triples excitations (CC-SDT1).

NUCLEAR STRUCTURE 6,8He, 6,8,10Be, 10,14C, 14,22O, 22Ne; calculated energies per nucleon (E/A) using VS-IMSRG, in-medium generator coordinate (IM-GCM), and IT-NCSM calculations, and compared with those from the CC-SDT1 calculations.

doi: 10.1103/PhysRevC.103.014315
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2021ZH55      Phys.Rev. C 104, 044002 (2021)

B.Zhu, R.Wirth, H.Hergert

Singular value decomposition and similarity renormalization group evolution of nuclear interactions

NUCLEAR STRUCTURE 4He, 16O, 40Ca; calculated ground-state energies as function of flow parameter from in-medium similarity renormalization group (IMSRG) approach. 2H; calculated ground-state energy from singular value decompositions (SVD), similarity renormalization group (SRG) with Entem and Machleidt (EM) interaction.

NUCLEAR REACTIONS 1H(p, X), (n, X); calculated singular value spectra in proton-proton and neutron-proton 1S0 partial waves for chiral N3LO two-nucleon, Entem and Machleidt (EM), and AV18 interactions, contours of momentum-space matrix elements of the EM interaction, neutron-proton phase shifts and mixing angles of the EM interaction. Singular value decompositions (SVD) method of nucleon-nucleon interactions in partial wave representation similarity renormalization group (SRG).

doi: 10.1103/PhysRevC.104.044002
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2020BR12      Phys. Rev. Res. 2, 022035 (2020)

B.A.Brown, K.Minamisono, J.Piekarewicz, H.Hergert, D.Garand, A.Klose, K.Konig, J.D.Lantis, Y.Liu, B.Maass, A.J.Miller, W.Nortershauser, S.V.Pineda, R.C.Powel, D.M.Rossi, F.Sommer, C.Sumithrarachchi, A.Teigelhofer, J.Watkins, R.Wirth

Implications of the 36Ca-36S and 38Ca-38Ar difference in mirror charge radii on the neutron matter equation of state

NUCLEAR STRUCTURE 36Ca, 36S, 38Ca, 38Ar; analyzed available data; deduced differences in charge radii between mirror nuclei, the slope of the symmetry energy L at the nuclear saturation density. Comparison with theoretical calculations of charge radii, differences and symmetry energy.

doi: 10.1103/PhysRevResearch.2.022035
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2020TI05      Eur.Phys.J. A 56, 272 (2020)

A.Tichai, R.Wirth, J.Ripoche, T.Duguet

Symmetry reduction of tensor networks in many-body theory

doi: 10.1140/epja/s10050-020-00233-6
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2020YA16      Phys.Rev.Lett. 124, 232501 (2020)

J.M.Yao, B.Bally, J.Engel, R.Wirth, T.R.Rodriguez, H.Hergert

Ab Initio Treatment of Collective Correlations and the Neutrinoless Double Beta Decay of 48Ca

RADIOACTIVITY 48Ca(2β-); calculated particle-number projected potential energy surfaces. 48Ti; deduced nuclear matrix elements correlations with B(E2).

doi: 10.1103/PhysRevLett.124.232501
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2019WI10      Phys.Rev. C 100, 044313 (2019)

R.Wirth, R.Roth

Similarity renormalization group evolution of hypernuclear Hamiltonians

NUCLEAR STRUCTURE 7Li, 9Be, 11B, 13C; calculated low-lying levels, J, π, extrapolated ground-state energies for the hypernuclei. 4,5,6,7H, 5,6,7,8,9,10He; calculated extrapolated absolute energies of low-lying natural-parity states for hypernuclei. 6Li, 8Be, 10B, 12C; calculated low-lying levels, J, π, extrapolated ground-state energies for the core nuclei of corresponding hypernuclei. 3,4,5,6H, 4,5,6,7,8,9He; calculated extrapolated absolute energies of low-lying natural-parity states for the core nuclei of corresponding hypernuclei. Similarity renormalization group (SRG) calculations in a basis spanned by antisymmetric harmonic-oscillator states with respect to three-body Jacobi coordinates and N4LOEMN+N2LONL, N3LOEM+N2LOL and N3LOEM+N2LONLnucleonic Hamiltonians. Comparison with available experimental data.

doi: 10.1103/PhysRevC.100.044313
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2018WI03      Phys.Rev. C 97, 064315 (2018)

R.Wirth, D.Gazda, P.Navratil, R.Roth

Hypernuclear no-core shell model

NUCLEAR STRUCTURE 4,5,6,7He; calculated ground state energies, excitation energies of low-lying states in 4,5,6,7He hypernuclei and 4,5,6He core nuclei using Jacobi-coordinate (J-NCSM) and Slater-determinant formulations of no-core shell model (NCSM) for the ab initio description of single-Λ hypernuclei. Comparison with available experimental values.

doi: 10.1103/PhysRevC.97.064315
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2016WI07      Phys.Rev.Lett. 117, 182501 (2016)

R.Wirth, R.Roth

Induced Hyperon-Nucleon-Nucleon Interactions and the Hyperon Puzzle

NUCLEAR STRUCTURE 6,7Li, 8,9Be, 12,13C; calculated hypernuclei separation and binding energies, energy levels, J, π.

doi: 10.1103/PhysRevLett.117.182501
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2014GA25      Few-Body Systems 55, 857 (2014)

D.Gazda, J.Mares, P.Navratil, R.Roth, R.Wirth

No-Core Shell Model for Nuclear Systems with Strangeness

NUCLEAR STRUCTURE 3,4H, 4He; calculated hypernuclei ground state, and separation energies. ab initio approach, comparison with available data.

doi: 10.1007/s00601-014-0848-9
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2014WI05      Phys.Rev.Lett. 113, 192502 (2014)

R.Wirth, D.Gazda, P.Navratil, A.Calci, J.Langhammer, R.Roth

AbĀInitio Description of p-Shell Hypernuclei

NUCLEAR STRUCTURE 7Li, 9Be, 13C; calculated ground-state energy of s-shell hypernuclei, absolute and excitation energies.

doi: 10.1103/PhysRevLett.113.192502
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Note: The following list of authors and aliases matches the search parameter R.Wirth: , R.K.WIRTH