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NSR database version of April 29, 2024.

Search: Author = D.Skoupil

Found 8 matches.

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2023BY03      Phys.Rev. C 108, 024615 (2023)

P.Bydzovsky, D.Denisova, D.Petrellis, D.Skoupil, P.Vesely, G.De Gregorio, F.Knapp, N.Lo Iudice

Self-consistent many-body approach to the electroproduction of hypernuclei

NUCLEAR REACTIONS 12C(e, eK+)12B, 16O(e, eK+)16N, 40Ca(e, eK+)40K, 48Ca(e, eK+)48K, E*<31 MeV; calculated differential σ(θ) for hypernuclei electroproduction, excitation spectrum, σ of electroproduction for selected hypernucleus states. Microscopic self-consistent many-body mean field approach, known as Tamm-Dancoff for hypernuclei extended by equation of motion phonon method (EMPM). Comparison to available experimental data and empirical shell-model calculations. Relevance to the preparation of planned E12-15-008 experiment at JLab.

NUCLEAR STRUCTURE 12B, 16N, 28Al, 40K, 48K; calculated Λ binding energy for hypernuclei. 40K, 48K; calculated levels of hypernuclei, J, π, proton and Λ single particle states. Tamm-Dancoff formalism with the NF YNG interaction and elementary amplitudes - SLA and BS3.

doi: 10.1103/PhysRevC.108.024615
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2023PE07      Phys.Rev. C 107, 045206 (2023)

D.Petrellis, D.Skoupil

Ridge regression for minimizing the couplings of hyperon resonances in k+Λ photoproduction

NUCLEAR REACTIONS 1H(polarized γ, K+Λ), E=1.7-2.2 GeV; calculated photon-beam asymmetry, double-polarization asymmetry, target asymmetry. Isobar model with the amplitude constructed from effective meson-baryon Lagrangians. Comparison to data obtained in CLAS experiment.

doi: 10.1103/PhysRevC.107.045206
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2022BY02      Phys.Rev. C 106, 044609 (2022)

P.Bydzovsky, D.Denisova, D.Skoupil, P.Vesely

Fermi motion effects in electroproduction of hypernuclei

NUCLEAR REACTIONS 12C(e, eK+)12B, Q2=0.06(GeV/c)2; calculated full electroproduction σ(θ) for the selected states of 12B hypernuclei, contributions from the transverse, longitudinal, and transverse-longitudinal interference parts to the full σ. Distorted-wave impulse approximation (DWIA) with two-component Chew-Goldberger-Low-Nambu-like (CGLN-like) form of the elementary amplitude which allows its use in a general reference frame moving with respect to the nucleus rest frame. Comparison with experimental results for 12B, 9Li, 16N hypernuclei electroproduction.

doi: 10.1103/PhysRevC.106.044609
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2021BY03      Phys.Rev. C 104, 065202 (2021)

P.Bydzovsky, A.Cieply, D.Petrellis, D.Skoupil, N.Zachariou

Model selection for K+ Σ- photoproduction within an isobar model

NUCLEAR REACTIONS 1n(polarized γ, K+Σ-), E=1150, 1350, 1150, 1750, 1950, 2150, 2350, 2550 MeV, [neutrons from 2H target]; analyzed experimental data from LEPS ad CLAS collaborations for differential cross section σ(Eγ, θ(K+)) as a functions of kaon center-of-mass angle, and incident photon energy, photon beam asymmetries as functions of kaon center-of-mass angle and incident photon energy. Isobar model for investigation of K+Σ- photoproduction off a neutron in the resonance region, with free parameters of the model fitted to experimental data from LEPS and CLAS Collaborations, and including masses and widths of resonances taken from Particle Data Group (PDG) Breit-Wigner evaluations.

doi: 10.1103/PhysRevC.104.065202
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2019BY03      Phys.Rev. C 100, 035202 (2019)

P.Bydzovsky, D.Skoupil

Photoproduction of K+Λ within a Regge-plus-resonance model

NUCLEAR REACTIONS 1H(γ, K+), E=1.6-6 GeV; calculated total σ(E), differential σ(θ, E), hyperon polarization, double-polarization observables using RPR-BS and RPR-BS(pv) models using MINUIT code for parameter optimization. Comparison with experimental data from CLAS 2004, CLAS 2005, CLAS 2010, CLAS 2016, GRAAL, LEPS 2006, and LEPS 2018 collaborations. Hybrid Regge-plus-resonance model, with a novel treatment of gauge-invariance restoration for kaon photoproduction off the proton target in and above the resonance region.

doi: 10.1103/PhysRevC.100.035202
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2018SK02      Phys.Rev. C 97, 025202 (2018)

D.Skoupil, P.Bydzovsky

Photo- and electroproduction of K+Λ with a unitarity-restored isobar model

NUCLEAR REACTIONS 1H(γ, K+), E=1.6-2.6 GeV; calculated total σ(E) using BS3 model, differential σ(E, θ), hyperon polarization, double-polarization observables, energy dependence of transverse and longitudinal cross sections using BS1, BS3, Saclay-Lyon and Kaon-MAID models for four kaon center-of-mass angles using MINUIT code, and compared with experimental data from CLAS 2005, CLAS 2010, MAMI and LEPS collaborations. New version of the isobar model BS3 for kaon photo- and electroproduction on the proton in the resonance region.

doi: 10.1103/PhysRevC.97.025202
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2016SK01      Phys.Rev. C 93, 025204 (2016)

D.Skoupil, P.Bydzovsky

Photoproduction of KΛ on the proton

NUCLEAR REACTIONS 1H(γ, K+)Λ, E=threshold-2.4 GeV; analyzed σ for hyperon production, σ(θ) and polarization data using two new isobar models and several hadron form factors; deduced consistency with the results of the Saclay-Lyon model.

doi: 10.1103/PhysRevC.93.025204
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2013BY01      Nucl.Phys. A914, 14c (2013)

P.Bydzovsky, D.Skoupil

Theory of the electromagnetic production of hyperons

NUCLEAR REACTIONS 1n(γ, K0), E=0.97 GeV;1H(γ, K+), E=1.3, 2.2, 8 GeV;1H(e, e'K+), E=1.75, 1.84 GeV;2H(γ, Λ), E=1 GeV; calculated hypernuclei σ(θ) using Saclay-Lyon, Kaon-MAID and H2 models. Compared to data.

doi: 10.1016/j.nuclphysa.2012.12.125
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