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NSR database version of April 26, 2024.

Search: Author = G.Rupak

Found 31 matches.

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2023YA29      Eur.Phys.J. A 59, 233 (2023)

C.-J.Yang, A.Ekstrom, C.Forssen, G.Hagen, G.Rupak, U.van Kolck

The importance of few-nucleon forces in chiral effective field theory

NUCLEAR STRUCTURE 3H, 4He, 16O, 40Ca; calculated binding energy per nucleon with NN-only and NN+NNN interactions at leading order (LO) with coupled-cluster model of the equation of state for symmetric nuclear matter; deduced LO four-nucleon forces could play a crucial role for describing heavy-mass nuclei.

doi: 10.1140/epja/s10050-023-01149-7
Citations: PlumX Metrics

2022HI04      Phys.Rev. C 106, 014601 (2022)

R.Higa, P.Premarathna, G.Rupak

Coupled-channels treatment of 7Be(p, γ)8B in effective field theory

NUCLEAR REACTIONS 7Be(p, γ), E(cm)=0.2864-50.3 MeV; calculated S-factor, E1 and M1 contributions to the radiative capture. Halo effective field theory up to next-to-next-to-leading order (NNLO). Comparison to experimental data and previous EFT calculations. Bayesian analysis to estimate the expected theory error.

doi: 10.1103/PhysRevC.106.014601
Citations: PlumX Metrics

2021HI13      Eur.Phys.J. A 57, 269 (2021)

R.Higa, P.Premarathna, G.Rupak

Coupled-channel treatment of 7Li(n, γ)8Li in effective field theory

NUCLEAR REACTIONS 7Li(n, γ), E<1 MeV; calculated total capture σ, contributions of inelastic channels. Comparison with available data.

doi: 10.1140/epja/s10050-021-00516-6
Citations: PlumX Metrics

2020PR07      Eur.Phys.J. A 56, 166 (2020)

P.Premarathna, G.Rupak

Bayesian analysis of capture reactions 3He(α, γ)7Be and 3H(α, γ)7Li

doi: 10.1140/epja/s10050-020-00113-z
Citations: PlumX Metrics

2019AC09      Phys.Rev. C 100, 021001R (2019)

B.Acharya, L.Platter, G.Rupak

Universal behavior of p-wave proton-proton fusion near threshold

NUCLEAR REACTIONS 1H(p, X), E<110 keV; calculated p-wave contribution to the proton-proton fusion S factor and total threshold S factor using chiral effective-field theory (EFT) up to the next-to-leading order.

doi: 10.1103/PhysRevC.100.021001
Citations: PlumX Metrics

2018HI09      Eur.Phys.J. A 54, 89 (2018)

R.Higa, G.Rupak, A.Vaghani

Radiative 3He(α, g)7Be reaction in halo effective field theory

NUCLEAR REACTIONS 3He(α, γ), E not given; calculated phase shifts using halo effective field theory (EFT) (in LO and NLO); deduced parameters from simultaneous fitting published phase shift data for both reactions. 3He(α, γ)7Be, E(cm)=0-1600 keV; calculated S-factor, branching ratio.Compared to data.

doi: 10.1140/epja/i2018-12486-5
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2017EL05      Phys.Rev.Lett. 119, 222505 (2017)

S.Elhatisari, E.Epelbaum, H.Krebs, T.A.Lahde, D.Lee, N.Li, B.-n.Lu, U.-G.Meissner, G.Rupak

Ab initio Calculations of the Isotopic Dependence of Nuclear Clustering

NUCLEAR STRUCTURE 12,14,16C; calculated proton and neutron densities for the ground states, spin-up proton probability distributions.

doi: 10.1103/PhysRevLett.119.222505
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2016EL02      Eur.Phys.J. A 52, 174 (2016)

S.Elhatisari, D.Lee, U.-G.Meissner, G.Rupak

Nucleon-deuteron scattering using the adiabatic projection method

doi: 10.1140/epja/i2016-16174-2
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2016EL03      Phys.Rev.Lett. 117, 132501 (2016)

S.Elhatisari, N.Li, A.Rokash, J.M.Alarcon, D.Du, N.Klein, B.-n.Lu, U.-G.Meissner, E.Epelbaum, H.Krebs, Ti.A.Lahde, De.Lee, G.Rupak

Nuclear Binding Near a Quantum Phase Transition

NUCLEAR STRUCTURE 3H, 3,4He, 8Be, 12C, 16O, 20Ne; calculated ground state energies; deduced a first-order transition at zero temperature from a Bose-condensed gas of alpha particles to a nuclear liquid. Leading order (LO) nuclear interactions.

doi: 10.1103/PhysRevLett.117.132501
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2015EL07      Nature(London) 528, 111 (2015)

S.Elhatisari, D.Lee, G.Rupak, E.Epelbaum, H.Krebs, T.A.Lahde, T.Luu, Ulf-G.Meissner

Ab initio alpha-alpha scattering

NUCLEAR REACTIONS 4He(α, α), (α, X), E<12 MeV; calculated phase shifts, wave functions. Comparison with experimental data, lattice Monte Carlo simulations.

doi: 10.1038/nature16067
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2015LA16      Eur.Phys.J. A 51, 92 (2015)

T.A.Lahde, T.Luu, D.Lee, U.-G.Meissner, E.Epelbaum, H.Krebs, G.Rupak

Nuclear lattice simulations using symmetry-sign extrapolation

NUCLEAR STRUCTURE 6He, 6Be, 12C; calculated two-nucleon, three-nucleon forces shift for low energy levels using PMC (Projection Monte Carlo) with LO, NLO, EMIB and 3NF.

doi: 10.1140/epja/i2015-15092-1
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2014EP01      Phys.Rev.Lett. 112, 102501 (2014)

E.Epelbaum, H.Krebs, T.A.Lahde, D.Lee, Ulf-G.Meissner, G.Rupak

Ab Initio Calculation of the Spectrum and Structure of 16O

NUCLEAR STRUCTURE 16O; calculated lowest energy even-parity states, J, π, charge radius, quadrupole moments, B(E2), M(E0). Comparison with experimental data.

doi: 10.1103/PhysRevLett.112.102501
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2013PI12      Eur.Phys.J. A 49, 151 (2013)

M.Pine, D.Lee, G.Rupak

Adiabatic projection method for scattering and reactions on the lattice

doi: 10.1140/epja/i2013-13151-3
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2013RU09      Phys.Rev.Lett. 111, 032502 (2013)

G.Rupak, D.Lee

Radiative Capture Reactions in Lattice Effective Field Theory

doi: 10.1103/PhysRevLett.111.032502
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2013RU15      Phys.Rev. C 88, 065801 (2013)

G.Rupak, P.Jaikumar

r-mode instability in quark stars with a crystalline crust

doi: 10.1103/PhysRevC.88.065801
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2012FE02      Eur.Phys.J. A 48, 24 (2012)

L.Fernando, R.Higa, G.Rupak

Leading E1 and M1 contributions to radiative neutron capture on lithium-7

doi: 10.1140/epja/i2012-12024-7
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2012RU05      Phys.Rev. C 86, 044608 (2012)

G.Rupak, L.Fernando, A.Vaghani

Radiative neutron capture on carbon-14 in effective field theory

NUCLEAR REACTIONS 14C(n, γ)15C, E(cm)<2 MeV; calculated B(E1) strength. Model-independent formalism of halo effective field theory. Resonant and nonresonant interactions. Comparison with experimental data.

doi: 10.1103/PhysRevC.86.044608
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2011RU09      Phys.Rev.Lett. 106, 222501 (2011)

G.Rupak, R.Higa

Model-Independent Calculation of Radiative Neutron Capture on Lithium-7

NUCLEAR REACTIONS 7Li(n, γ), E not given; calculated σ. Phenomenological potentials in the single-particle approximation.

doi: 10.1103/PhysRevLett.106.222501
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2010RU11      Phys.Rev. C 82, 055806 (2010)

G.Rupak, P.Jaikumar

Constraining phases of quark matter with studies of r-mode damping in compact stars

doi: 10.1103/PhysRevC.82.055806
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2009RU02      Nucl.Phys. A816, 52 (2009)

G.Rupak, T.Schafer

Density functional theory for non-relativistic fermions in the unitarity limit

doi: 10.1016/j.nuclphysa.2008.11.004
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2005BE22      Phys.Rev. D 71, 054015 (2005)

P.F.Bedaque, H.W.Griesshammer, G.Rupak

A nucleon in a tiny box

doi: 10.1103/PhysRevD.71.054015
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2005RE03      Phys.Rev. C 71, 025201 (2005)

S.Reddy, G.Rupak

Phase structure of two-flavor quark matter: Heterogeneous superconductors

doi: 10.1103/PhysRevC.71.025201
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2003BE08      Nucl.Phys. A714, 589 (2003)

P.E.Bedaque, G.Rupak, H.W.Griesshammer, H.-W.Hammer

Low energy expansion in the three body system to all orders and the triton channel

NUCLEAR REACTIONS 2H(n, n), E not given; calculated phase shifts, three-body force effects.

doi: 10.1016/S0375-9474(02)01402-1
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2003BE63      Phys.Rev. C 68, 065802 (2003)

P.F.Bedaque, G.Rupak, M.J.Savage

Goldstone bosons in the 3P2 superfluid phase of neutron matter and neutrino emission

doi: 10.1103/PhysRevC.68.065802
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2003RU03      Nucl.Phys. A717, 73 (2003)

G.Rupak, X.-W.Kong

Quartet S-wave p-d scattering in EFT

NUCLEAR REACTIONS 2H(p, p), E(cm)=20-100 MeV; calculated phase shifts. Pionless effective field theory, power counting, comparison with data.

doi: 10.1016/S0375-9474(03)00638-9
Citations: PlumX Metrics

2002GR07      Phys.Lett. 529B, 57 (2002)

H.W.Griesshammer, G.Rupak

Nucleon Polarisabilities from Compton Scattering on the Deuteron

NUCLEAR REACTIONS 2H(γ, γ), E=20-50 MeV; calculated, analyzed σ(θ); deduced nucleon polarizabilities.

doi: 10.1016/S0370-2693(02)01238-8
Citations: PlumX Metrics

2000PH01      Phys.Lett. 473B, 209 (2000)

D.R.Phillips, G.Rupak, M.J.Savage

Improving the Convergence of NN Effective Field Theory

NUCLEAR STRUCTURE 2H; calculated radius, quadrupole moment. Low-energy effective field theory.

doi: 10.1016/S0370-2693(99)01496-3
Citations: PlumX Metrics

2000RU07      Nucl.Phys. A678, 405 (2000)

G.Rupak

Precision Calculation of np → dγ Cross Section for Big-Bang Nucleosynthesis

NUCLEAR REACTIONS 1H(n, γ), E(cm) < 1 MeV; 2H(γ, n), E=2-10 MeV; calculated σ. Effective field theory. Applications to big-bang nucleosynthesis discussed.

doi: 10.1016/S0375-9474(00)00323-7
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1999CH21      Nucl.Phys. A653, 386 (1999)

J.-W.Chen, G.Rupak, M.J.Savage

Nucleon-Nucleon Effective Field Theory without Pions

NUCLEAR REACTIONS 1H(n, γ), E=low; calculated σ, effective range parameters. Effective field theory without pions.

NUCLEAR STRUCTURE 2H; calculated form factors. Effective field theory without pions.

doi: 10.1016/S0375-9474(99)00298-5
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1999CH31      Phys.Lett. 464B, 1 (1999)

J.W.Chen, G.Rupak, M.J.Savage

Isoscalar M1 and E2 Amplitudes in np → dγ

NUCLEAR REACTIONS 1H(n, γ), E=low; calculated isoscaler M1 and E2 amplitudes.

NUCLEAR STRUCTURE 2H; calculated quadrupole form factor.

doi: 10.1016/S0370-2693(99)01007-2
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1999RU08      Phys.Rev. C60, 054004 (1999)

G.Rupak, N.Shoresh

Next-to-Next-to-Leading-Order Calculation of Two-Nucleon Scattering in an Effective Field Theory

doi: 10.1103/PhysRevC.60.054004
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