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NSR database version of April 11, 2024.

Search: Author = W.Cosyn

Found 25 matches.

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2020CO14      Phys.Rev. C 102, 065204 (2020)

W.Cosyn, C.Weiss

Polarized electron-deuteron deep-inelastic scattering with spectator nucleon tagging

NUCLEAR REACTIONS 2H(e-, e-'), E in GeV region; calculated polarized deuteron Light-front (LF) spectral function and nucleon momentum distributions using covariant spin density matrix formalism to describe general deuteron polarization in collider experiments, and light-front (LF) quantum mechanics to factorize nuclear and nucleonic structure in the deep inelastic scattering (DIS) process; proposed practical procedures for neutron spin structure extraction from the tagged deuteron spin asymmetries for applications in future DIS facilities such as JLab upgrade to 12 GeV, and electron-ion collider (EIC) at Brookhaven National Laboratory with E(cm)=20-100 GeV.

doi: 10.1103/PhysRevC.102.065204
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2019CO13      Phys.Lett. B 799, 135035 (2019)

W.Cosyn, C.Weiss

Neutron spin structure from polarized deuteron DIS with proton tagging

NUCLEAR REACTIONS 2H(polarized E, X)1H, E ∼ 100 MeV; calculated the longitudinal spin asymmetries in polarized tagged deep-inelastic scattering.

doi: 10.1016/j.physletb.2019.135035
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2019RY04      Phys.Rev. C 100, 054620 (2019)

J.Ryckebusch, W.Cosyn, T.Vieijra, C.Casert

Isospin composition of the high-momentum fluctuations in nuclei from asymptotic momentum distributions

NUCLEAR STRUCTURE 4He, 9Be, 12C, 16O, 27Al, 40Ar, 40,48Ca, 56Fe, 63Cu, 84Kr, 108Ag, 124Xe, 197Au, 208Pb; calculated proton and neutron short-range correlations (SRC) scaling factors, relative probability of nucleon-pair (pp, pn, nn, np) SRC in a specific nucleus relative to the deuteron in the framework of low-order correlation operator approximation (LCA). Discussed impact the variations of the magnitude of the European Muon Collaboration (EMC) effect across nuclei.

doi: 10.1103/PhysRevC.100.054620
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2017CO12      Int.J.Mod.Phys. E26, 1730004 (2017)

W.Cosyn, M.Sargsian

Nuclear final-state interactions in deep inelastic scattering off the lightest nuclei

NUCLEAR REACTIONS 2H(E, X)1H, E=1.25, 1.5, 1.73, 2.0, 2.4 GeV; calculated QCD mass dependent parameters. Comparison with experimental data for tagged protons.

doi: 10.1142/S0218301317300041
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2016CO03      Phys.Rev. C 93, 034608 (2016)

C.Colle, W.Cosyn, J.Ryckebusch

Final-state interactions in two-nucleon knockout reactions

NUCLEAR REACTIONS 12C, 27Al, 56Fe, 208Pb(e, e'pp), (e, e'np), E at 0-600 MeV/c; calculated momentum distribution in the plane-wave limit of the ejected nucleons with and without RMSGA attenuation corrections, normalized θ12 distributions, cross-section ratios and corresponding transparencies, mass dependence of single-charge exchange (SCX) probabilities and two-nucleon knockout transparencies; deduced impact of final-state interactions (FSI) in short-range correlations (SRC)-driven exclusive A(e, e'pN) processes. Relativistic multiple-scattering Glauber approximation (RMSGA).

doi: 10.1103/PhysRevC.93.034608
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2016CO07      Phys.Rev. C 93, 055205 (2016)

W.Cosyn, M.M.Sargsian

High-x structure function of the virtually free neutron

NUCLEAR REACTIONS 2H(e, e'p), E=4.23, 5.27 GeV; analyzed Ratio R of the Barely Off-shell Nucleon Structure (BONuS) data to plane-wave model as a function of spectator cosθs, and compared to virtual nucleon approximation (VNA) and final-state interactions (FSI) calculations in the present work; deduced high-x structure function of the neutron using pole extrapolation method in semi-inclusive scattering from deuteron with a tagged recoil proton.

doi: 10.1103/PhysRevC.93.055205
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2015CO13      Phys.Rev. C 92, 024604 (2015)

C.Colle, O.Hen, W.Cosyn, I.Korover, E.Piasetzky, J.Ryckebusch, L.B.Weinstein

Extracting the mass dependence and quantum numbers of short-range correlated pairs from A(e, e'p) and A(e, e'pp) scattering

NUCLEAR REACTIONS 12C, 27Al, 56Fe, 208Pb(e, e'p), (e, e'pp), E=5.014 GeV; analyzed experimental data collected in 2004 for one- and two-proton knockouts using CEBAF Large Acceptance Spectrometer (CLAS); deduced distribution of cosine of the angle γ between the missing momentum of the leading proton and the recoil proton, mass dependence of cross-section ratios and of the number of pp and pn short-range correlated (SRC) pairs. Comparison with reaction-model calculation for scattering from close-proximity pairs.

doi: 10.1103/PhysRevC.92.024604
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2015RY02      J.Phys.(London) G42, 055104 (2015)

J.Ryckebusch, M.Vanhalst, W.Cosyn

Stylized features of single-nucleon momentum distributions

NUCLEAR STRUCTURE 2H, 4He, 9Be, 12C, 16O, 27Al, 40,48Ca, 56Fe, 108Ag; calculated momentum dependence, single-nucleon momentum distribution, rms radii; deduced method for calculations of nuclear short-range correlations (SRC). Comparison with available data.

doi: 10.1088/0954-3899/42/5/055104
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2014CO02      Phys.Rev. C 89, 014612 (2014)

W.Cosyn, W.Melnitchouk, M.Sargsian

Final-state interactions in inclusive deep-inelastic scattering from the deuteron

doi: 10.1103/PhysRevC.89.014612
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2014CO05      Phys.Rev. C 89, 024603 (2014)

C.Colle, W.Cosyn, J.Ryckebusch, M.Vanhalst

Factorization of exclusive electron-induced two-nucleon knockout

NUCLEAR REACTIONS 12C, 27Al, 56Fe, 208Pb(e, e'2p), E in GeV region; calculated factorized cross section and momentum distributions for two-nucleon knockout reaction. Short-range correlations. Relevance to experiments at Jefferson Laboratory (JLab).

doi: 10.1103/PhysRevC.89.024603
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2014MO25      J.Phys.(London) G41, 105109 (2014)

P.Monaghan, R.Shneor, R.Subedi, B.D.Anderson, K.Aniol, J.Annand, J.Arrington, H.B.Benaoum, F.Benmokhtar, P.Bertin, W.Bertozzi, W.Boeglin, J.P.Chen, S.Choi, E.Chudakov, C.Ciofi degli Atti, E.Cisbani, W.Cosyn, B.Craver, C.W.de Jager, R.J.Feuerbach, E.Folts, S.Frullani, F.Garibaldi, O.Gayou, S.Gilad, R.Gilman, O.Glamazdin, J.Gomez, O.Hansen, D.W.Higinbotham, T.Holmstrom, H.Ibrahim, R.Igarashi, E.Jans, X.Jiang, L.Kaufman, A.Kelleher, A.Kolarkar, E.Kuchina, G.Kumbartzki, J.J.LeRose, R.Lindgren, N.Liyanage, D.J.Margaziotis, P.Markowitz, S.Marrone, M.Mazouz, D.Meekins, R.Michaels, B.Moffit, H.Morita, S.Nanda, C.F.Perdrisat, E.Piasetzky, M.Potokar, V.Punjabi, Y.Qiang, J.Reinhold, B.Reitz, G.Ron, G.Rosner, J.Ryckebusch, A.Saha, B.Sawatzky, J.Segal, A.Shahinyan, S.Sirca, K.Slifer, P.Solvignon, V.Sulkosky, N.Thompson, P.E.Ulmer, G.M.Urciuoli, E.Voutier, K.Wang, J.W.Watson, L.B.Weinstein, B.Wojtsekhowski, S.Wood, H.Yao, X.Zheng, L.Zhu

Measurement of the 12C(e, e'p)11B two-body breakup reaction at high missing momentum

NUCLEAR REACTIONS 12C(E, E'P), E200-400 MeV; measured reaction products, Ep, Ip; deduced σ(θ, E). Comparison with WS+Glauber calculations.

doi: 10.1088/0954-3899/41/10/105109
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2014PA06      Phys.Rev. C 89, 024601 (2014)

V.Pandey, N.Jachowicz, J.Ryckebusch, T.Van Cuyck, W.Cosyn

Quasielastic contribution to antineutrino-nucleus scattering

NUCLEAR REACTIONS 12C(ν-bar, μ+)X, E=700 MeV; calculated quasielastic (QE) contribution to double differential σ as function of Tμ and cosθμ. Comparison with the MiniBooNE experimental double-differential σ data. Impulse approximation (IA) and nonrelativistic continuum random phase approximation (CRPA) approach with Skyrme type nucleon-nucleon interaction.

doi: 10.1103/PhysRevC.89.024601
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2013CO14      Phys.Rev. C 87, 064608 (2013)

W.Cosyn, J.Ryckebusch

Nuclear ρ meson transparency in a relativistic Glauber model

doi: 10.1103/PhysRevC.87.064608
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2013RO06      Phys.Rev. C 87, 028202 (2013)

G.Ron, W.Cosyn, E.Piasetzky, J.Ryckebusch, J.Lichtenstadt

Nuclear density dependence of in-medium polarization

NUCLEAR REACTIONS 12C(polarized e, e'p)11B, E at <250 MeV/c; calculated effective densities for protons removed from the s- and p-shells, expected in-medium modification effects. Chiral quark soliton (CQS), and quark meson coupling (QMC) models. Proposed measurement of polarization transfer components for proton knockout from s- or p-shell.

doi: 10.1103/PhysRevC.87.028202
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2012VA07      Phys.Rev. C 86, 044619 (2012)

M.Vanhalst, J.Ryckebusch, W.Cosyn

Quantifying short-range correlations in nuclei

doi: 10.1103/PhysRevC.86.044619
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2011CO02      Few-Body Systems 49, 77 (2011)

W.Cosyn, J.Ryckebusch

Modeling Final-State Interactions with a Relativistic Multiple-Scattering Approximation, Relativistic Description of Two- and Three-Body Systems in Nuclear Physics, ECT*, October 19-23 2009

doi: 10.1007/s00601-010-0115-7
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2011CO12      Phys.Rev. C 84, 014601 (2011)

W.Cosyn, M.Sargsian

Final-state interactions in semi-inclusive deep inelastic scattering off the deuteron

doi: 10.1103/PhysRevC.84.014601
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2011RY03      Phys.Rev. C 83, 054601 (2011)

J.Ryckebusch, W.Cosyn, M.Vanhalst

Density dependence of quasifree single-nucleon knockout reactions

NUCLEAR REACTIONS 4He, 12C, 56Fe, 208Pb(e, e'p), (p, 2p), E not given; calculated function δ(r, θ), radial reaction probability densities δ(r), average density and radius as a function of target mass, momentum distributions. Quasifree single-nucleon knockout reactions. Impulse approximation and relativized extension of Glauber multiple-scattering reaction theory.

doi: 10.1103/PhysRevC.83.054601
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2011VA11      Phys.Rev. C 84, 031302 (2011)

M.Vanhalst, W.Cosyn, J.Ryckebusch

Counting the number of correlated pairs in a nucleus

NUCLEAR REACTIONS 4He, 9Be, 12C, 27Al, 40Ca, 48Ca, 56Fe, 63Cu, 108Ag, 197Au(e, e'), E not given; calculated relative quantum numbers l=s, p, d, f, g, h, i for number of proton-neutron, proton-proton, and neutron-neutron pairs in relative S states, a2(A/2H) coefficients for A=4-200. Comparison with experimental data. Power law for proton-neutron pairs.

doi: 10.1103/PhysRevC.84.031302
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2009CO10      Phys.Rev. C 80, 011602 (2009)

W.Cosyn, J.Ryckebusch

Density dependence of single-proton and two-proton knockout reactions under quasifree conditions

NUCLEAR REACTIONS 12C(e, e'p), (γ, 2p), (p, 2p), E not given; calculated average effective nuclear densities and rms radii in one-proton and two-proton knockout reactions in a relativistic framework.

doi: 10.1103/PhysRevC.80.011602
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2008CO04      Phys.Rev. C 77, 034602 (2008)

W.Cosyn, M.C.Martinez, J.Ryckebusch

Color transparency and short-range correlations in exclusive pion photo- and electroproduction from nuclei

NUCLEAR REACTIONS 4He, 12C, 27Al, 64Cu, 197Au(γ, πX), (e, e'πX), E not given; calculated nuclear transparencies for pion and photoelectron production. Comparison with experimental data.

doi: 10.1103/PhysRevC.77.034602
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2007CL04      Phys.Rev.Lett. 99, 242502 (2007)

B.Clasie, X.Qian, J.Arrington, R.Asaturyan, F.Benmokhtar, W.Boeglin, P.Bosted, A.Bruell, M.E.Christy, E.Chudakov, W.Cosyn, M.M.Dalton, A.Daniel, D.Day, D.Dutta, L.El Fassi, R.Ent, H.C.Fenker, J.Ferrer, N.Fomin, H.Gao, K.Garrow, D.Gaskell, C.Gray, T.Horn, G.M.Huber, M.K.Jones, N.Kalantarians, C.E.Keppel, K.Kramer, A.Larson, Y.Li, Y.Liang, A.F.Lung, S.Malace, P.Markowitz, A.Matsumura, D.G.Meekins, T.Mertens, G.A.Miller, T.Miyoshi, H.Mkrtchyan, R.Monson, T.Navasardyan, G.Niculescu, I.Niculescu, Y.Okayasu, A.K.Opper, C.Perdrisat, V.Punjabi, A.W.Rauf, V.M.Rodriquez, D.Rohe, J.Ryckebusch, J.Seely, E.Segbefia, G.R.Smith, M.Strikman, M.Sumihama, V.Tadevosyan, L.Tang, V.Tvaskis, A.Villano, W.F.Vulcan, F.R.Wesselmann, S.A.Wood, L.Yuan, X.C.Zheng

Measurement of Nuclear Transparency for the A(e, e'π+) Reaction

NUCLEAR REACTIONS 2H, 12C, 27Al, 63Cu, 197Au(e, e'π+), E=4.021-5.767 GeV; measured electron and pion energies. Deduced nuclear transparency.

doi: 10.1103/PhysRevLett.99.242502
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2007RY02      Eur.Phys.J. A 31, 585 (2007)

J.Ryckebusch, W.Cosyn, B.Van Overmeire, C.Martinez

The transparency of nuclei to nucleons and pions in a relativistic Glauber approximation

NUCLEAR REACTIONS 4He(γ, π-p), Eγ=1.6-4.5 GeV; 12C(p, 2p), Ep=1 GeV; measured σ, compared to model calculations.

doi: 10.1140/epja/i2006-10227-1
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2006CO19      Phys.Rev.C 74, 062201 (2006)

W.Cosyn, M.C.Martinez, J.Ryckebusch, B.Van Overmeire

Nuclear transparencies from photoinduced pion production

NUCLEAR REACTIONS 4He, 12C, 16O, 56Fe, 208Pb(γ, pπ-), E=high; calculated transparency.

doi: 10.1103/PhysRevC.74.062201
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2006VA08      Phys.Rev. C 73, 064603 (2006)

B.Van Overmeire, W.Cosyn, P.Lava, J.Ryckebusch

Relativistic eikonal description of A(p, pN) reactions

NUCLEAR REACTIONS 12C(p, 2p), E=1 GeV; 16O, 40Ca(p, np), E=1 GeV; 4He(p, 2p), E=250 MeV; calculated initial- and final-state interaction effects, σ(E, θ), related quantities. Relativistic eikonal approximation, comparisons with data.

doi: 10.1103/PhysRevC.73.064603
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