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NSR database version of April 11, 2024.

Search: Author = R.Workman

Found 101 matches.

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2023BR14      Phys.Rev. C 108, 065205 (2023)

W.J.Briscoe, A.Schmidt, I.Strakovsky, R.L.Workman, A.Svarc

Extended SAID partial-wave analysis of pion photoproduction

doi: 10.1103/PhysRevC.108.065205
Citations: PlumX Metrics

2023MA55      Eur.Phys.J. A 59, 286 (2023)

M.Mai, J.Hergenrather, M.Doring, T.Mart, U.-G.Meissner, D.Ronchen, R.Workman, Julich–Bonn–Washington Collaboration

Inclusion of KΛ electroproduction data in a coupled channel analysis

doi: 10.1140/epja/s10050-023-01188-0
Citations: PlumX Metrics

2023ST08      Phys.Rev. C 108, 015202 (2023)

I.Strakovsky, W.J.Briscoe, E.Chudakov, I.Larin, L.Pentchev, A.Schmidt, R.L.Workman

Plausibility of the LHCb Pc(4312)+ in the GlueX γp → J/γp total cross sections

NUCLEAR REACTIONS 1H(γ, p), E=4.2-4.3 GeV; analyzed gluonic excitation (GlueX) experiment data on J/γp photoproduction; deduced resonance like structures. Fitting of the experimental σ with phenomenological formula using the Landau-Lifshitz normalization.

doi: 10.1103/PhysRevC.108.015202
Citations: PlumX Metrics

2023SV02      Phys.Rev. C 108, 014615 (2023)

A.Svarc, R.L.Workman

Laurent+Pietarinen partial-wave analysis

NUCLEAR REACTIONS 1H(γ, K+Λ), E(cm)=1625-2296 MeV; analyzed kaon photoproduction data from CLAS and GRAAL experiments; deduced multipoles, resonance pole parameters. Experimental data fitted in terms of a modified Laurent expansion (Laurent+Pietarinen expansion). Bonn-Gatchina analysis.

doi: 10.1103/PhysRevC.108.014615
Citations: PlumX Metrics

2022BR03      Eur.Phys.J. A 58, 23 (2022)

W.J.Briscoe, A.E.Kudryavtsev, I.I.Strakovsky, V.E.Tarasov, R.L.Workman

On the photoproduction reactions γd → πNN

doi: 10.1140/epja/s10050-022-00671-4
Citations: PlumX Metrics

2022MA35      Phys.Rev. C 106, 015201 (2022)

M.Mai, M.Doring, C.Granados, H.Haberzettl, J.Hergenrather, Ulf-G.Meissner, D.Ronchen, I.Strakovsky, R.Workman, for the Julich-Bonn-Washington Collaboration

Coupled-channels analysis of pion and η electroproduction within the Julich-Bonn-Washington model

NUCLEAR REACTIONS 1H(γ, π0p), (γ, π+n), (γ, ηp), E=1.13-1.6 GeV; analyzed jointly pion and η electroproduction differential σ experimental data from CLAS, Jefferson Lab, OOPS-MIT, MAMI-AI, DESI, ELSA and other collaborations during 1971-2007 using dynamical coupled-channels model, based on the Julich-Bonn-Washington analysis of pion electroproduction data; deduced fitted results, and η multipoles for higher fixed values of Q2.

doi: 10.1103/PhysRevC.106.015201
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2022ST04      Phys.Rev. C 105, 045202 (2022)

I.Strakovsky, S.Sirca, W.J.Briscoe, A.Deur, A.Schmidt, R.L.Workman

Single-pion contribution to the Gerasimov-Drell-Hearn sum rule and related integrals

NUCLEAR REACTIONS 1H(γ, X), (γ, nπ+), (γ, pπ0), N(γ, X), (γ, nπ0), (γ, pπ-), E=150-2000 MeV; analyzed experimental and theoretical data on σ, differences of total σ for the helicity states 3/2 and 1/2; deduced Gerasimov-Drell-Hearn (GDH), Baldin, and Gell-Mann–Goldberger–Thirring (GGT) sum rules, contribution of the single-pion photoproduction off the nucleon to the sum-rules to these sum rules.

doi: 10.1103/PhysRevC.105.045202
Citations: PlumX Metrics

2022WO03      Prog.Theor.Exp.Phys. 2022, 083C01 (2022)


Review of Particle Physics

doi: 10.1093/ptep/ptac097
Citations: PlumX Metrics

2021MA40      Phys.Rev. C 103, 065204 (2021)

M.Mai, M.Doring, C.Granados, H.Haberzettl, Ulf-G.Meissner, D.Ronchen, I.Strakovsky, R.Workman

Julich-Bonn-Washington model for pion electroproduction multipoles

NUCLEAR REACTIONS 1H(polarized e, e'π0)p, (polarized e, e'π+)n, E=1.13-1.6 GeV; analyzed a large number of data points for cross sections and angular distributions in SAID database from experiments at different laboratories such as CEBAF Jefferson laboratory, BATES-MIT, Mainz using Julich-Bonn-Washington model and MAID2007, ETA-MAID and KAON-MAID models for photo- and electroproduction of pions, etas, and kaons; deduced phenomenological parametrization of multipoles for the meson electroproduction multipoles associated with Δ(1232), N(1440), N(1520), and N(1535) resonances; assessed systematic uncertainties.

doi: 10.1103/PhysRevC.103.065204
Citations: PlumX Metrics

2020BR13      Eur.Phys.J. A 56, 218 (2020)

W.J.Briscoe, A.E.Kudryavtsev, I.I.Strakovsky, V.E.Tarasov, R.L.Workman

Threshold π- photoproduction on the neutron

NUCLEAR REACTIONS 2H(γ, π-), E<180 MeV; analyzed available data; deduced pion photoproduction on neutron σ.

doi: 10.1140/epja/s10050-020-00221-w
Citations: PlumX Metrics

2020KL02      Eur.Phys.J. A 56, 261 (2020)

E.Klempt, V.Burkert, U.Thoma, L.Tiator, R.Workman, for the Baryon at PDG Collaboration

Λ and Σ Excitations and the Quark Model

doi: 10.1140/epja/s10050-020-00261-2
Citations: PlumX Metrics

2018SV01      Phys.Rev. C 97, 054611 (2018)

A.Svarc, Y.Wunderlich, H.Osmanovic, M.Hadzimehmedovic, R.Omerovic, J.Stahov, V.Kashevarov, K.Nikonov, M.Ostrick, L.Tiator, R.Workman

Connection between angle-dependent phase ambiguities and the uniqueness of the partial-wave decomposition

doi: 10.1103/PhysRevC.97.054611
Citations: PlumX Metrics

2017AZ01      Phys.Rev. C 95, 025205 (2017)

Y.I.Azimov, I.I.Strakovsky, W.J.Briscoe, R.L.Workman

Legendre analysis of differential distributions in hadronic reactions

NUCLEAR REACTIONS 1H(p, π0p), E=235.6, 714.5, 815.0; 1H(p, π0η), E=953.2, 1355.4, 1412.1 MeV; analyzed differential σ(θ, E) data from A2 Collaboration at MAMI; deduced best fit results using Legendre polynomials, coefficients of Legendre polynomials for unpolarized and polarized data. Model-independent approach for modern detailed high-precision and high-statistics experimental data for two hadron reactions.

doi: 10.1103/PhysRevC.95.025205
Citations: PlumX Metrics

2017TI06      Phys.Rev. C 96, 025210 (2017)

L.Tiator, R.L.Workman, Y.Wunderlich, H.Haberzettl

Amplitude reconstruction from complete electroproduction experiments and truncated partial-wave expansions

doi: 10.1103/PhysRevC.96.025210
Citations: PlumX Metrics

2017WO01      Phys.Rev. C 95, 015206 (2017)

R.L.Workman, L.Tiator, Y.Wunderlich, M.Doring, H.Haberzettl

Amplitude reconstruction from complete photoproduction experiments and truncated partial-wave expansions

doi: 10.1103/PhysRevC.95.015206
Citations: PlumX Metrics

2017WU12      Phys.Rev. C 96, 065202 (2017)

Y.Wunderlich, A.Svarc, R.L.Workman, L.Tiator, R.Beck

Toward an understanding of discrete ambiguities in truncated partial-wave analyses

doi: 10.1103/PhysRevC.96.065202
Citations: PlumX Metrics

2016AN18      Eur.Phys.J. A 52, 284 (2016)

A.V.Anisovich, R.Beck, M.Doring, M.Gottschall, J.Hartmann, V.Kashevarov, E.Klempt, Ulf-G.Meissner, V.Nikonov, M.Ostrick, D.Ronchen, A.Sarantsev, I.Strakovsky, A.Thiel, L.Tiator, U.Thoma, R.Workman, Y.Wunderlich

The impact of new polarization data from Bonn, Mainz and Jefferson Laboratory on γp → πN multipoles

NUCLEAR REACTIONS 1H(γ, π0), (γ, π+), E=147-219, 650-2200 MeV; analyzed published σ(θ), beam asymmetry, double polarization data; calculated σ(θ), beam asymmetry, double polarization using PWA (Partial-Wave Analysis) BnGa code, Juelich-Bonn DCC (Dynamical CC) model, MAID and SAID models; deduced photoproduction multipoles, partial waves real, imaginary parts, parameters.

doi: 10.1140/epja/i2016-16284-9
Citations: PlumX Metrics

2016DO06      Phys.Rev. C 93, 065205 (2016)

M.Doring, J.Revier, D.Ronchen, R.L.Workman

Correlations of πN partial waves for multireaction analyses

doi: 10.1103/PhysRevC.93.065205
Citations: PlumX Metrics

2016GR06      Phys.Rev. C 93, 062201 (2016)

A.Gridnev, I.G.Alekseev, V.A.Andreev, I.G.Bordyuzhin, W.J.Briscoe, Ye.A.Filimonov, V.V.Golubev, D.V.Kalinkin, L.I.Koroleva, N.G.Kozlenko, V.S.Kozlov, A.G.Krivshich, V.A.Kuznetsov, B.V.Morozov, V.M.Nesterov, D.V.Novinsky, V.V.Ryltsov, M.Sadler, I.I.Strakovsky, A.D.Sulimov, V.V.Sumachev, D.N.Svirida, V.I.Tarakanov, V.Yu.Trautman, R.L.Workman

Search for narrow resonances in πp elastic scattering from the EPECUR experiment

NUCLEAR REACTIONS 1H(π+, π+), (π-, π-), (π-, Κ0Σ0), (π-, Κ+Σ-), (π+, Κ+Σ+), (π-, ηn), (π-, ΚΛ), p at 800-1300 MeV/c; analyzed cross-section data from EPECUR collaboration using multichannel K-matrix approach; deduced narrow resonances S11(1686 MeV) and P11(1720 MeV), widths and other parameters.

doi: 10.1103/PhysRevC.93.062201
Citations: PlumX Metrics

2016MA86      Phys.Lett. B 755, 92 (2016)

G.Macharashvili, D.Chiladze, S.Dymov, Z.Bagdasarian, S.Barsov, R.Gebel, B.Gou, M.Hartmann, A.Kacharava, I.Keshelashvili, A.Khoukaz, P.Kulessa, A.Kulikov, A.Lehrach, N.Lomidze, B.Lorentz, R.Maier, D.Mchedlishvili, S.Merzliakov, S.Mikirtychyants, M.Nioradze, H.Ohm, D.Prasuhn, F.Rathmann, V.Serdyuk, D.Schroer, V.Shmakova, R.Stassen, H.J.Stein, H.Stockhorst, I.I.Strakovsky, H.Stroher, M.Tabidze, A.Taschner, S.Trusov, D.Tsirkov, Yu.Uzikov, Yu.Valdau, C.Wilkin, R.L.Workman, P.Wuestner

Measurement of the absolute differential cross section of proton -proton elastic scattering at small angles

doi: 10.1016/j.physletb.2016.01.066
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetO2325.

2016MA87      Phys.Lett. B 755, 92 (2016)

G.Macharashvili, D.Chiladze, S.Dymov, Z.Bagdasarian, S.Barsov, R.Gebel, B.Gou, M.Hartmann, A.Kacharava, I.Keshelashvili, A.Khoukaz, P.Kulessa, A.Kulikov, A.Lehrach, N.Lomidze, B.Lorentz, R.Maier, D.Mchedlishvili, S.Merzliakov, S.Mikirtychyants, M.Nioradze, H.Ohm, D.Prasuhn, F.Rathmann, V.Serdyuk, D.Schroer, V.Shmakova, R.Stassen, H.J.Stein, H.Stockhorst, I.I.Strakovsky, H.Stroeher, M.Tabidze, A.Taeschner, S.Trusov, D.Tsirkov, Yu.Uzikov, Yu.Valdau, C.Wilkin, R.L.Workman, P.Wuestner

Measurement of the absolute differential cross section of proton-proton elastic scattering at small angles

NUCLEAR REACTIONS 1H(p, p), E=1-2.8 GeV; measured products, Eπ, Iπ; deduced σ(θ). Data were imported from EXFOR entry O2325.

doi: 10.1016/j.physletb.2016.01.066
Citations: PlumX Metrics

2016TI11      Phys.Rev. C 94, 065204 (2016)

L.Tiator, M.Doring, R.L.Workman, M.Hadzimehmedovic, H.Osmanovic, R.Omerovic, J.Stahov, A.Svarc

Baryon transition form factors at the pole

doi: 10.1103/PhysRevC.94.065204
Citations: PlumX Metrics

2016WO04      Phys.Rev. C 93, 045201 (2016)

R.L.Workman, W.J.Briscoe, I.I.Strakovsky

Sensitivity of the COSY dibaryon candidate to np elastic scattering measurements

NUCLEAR REACTIONS 1H(n, n), (n, X), E(cm)=2.38 GeV; analyzed total cross sections, angular distributions for Ay, total cross sections near the COSY resonance and compared to data from several laboratories. Compared different fits with and without an associated pole to clarify the impact of these COSY data. Dibaryon observation in WASA-at-COSY experiment.

doi: 10.1103/PhysRevC.93.045201
Citations: PlumX Metrics

2016WO10      Phys.Rev. C 94, 065203 (2016)

R.L.Workman, W.J.Briscoe, I.I.Strakovsky

Partial-wave analysis of nucleon-nucleon elastic scattering data

NUCLEAR REACTIONS 1H(p, p), (polarized p, p), E<3 GeV; 1H(n, n), E<1.3 GeV; analyzed differential σ(θ, E), total σ and vector analyzing Ay(θ, E) data from COSY-WASA and COSY-ANKE facilities and Scattering Analysis Interactive Database (SAID); deduced comparison of the SES and energy-dependent (ED) fits, partial-wave amplitudes, phase-shift parameters.

doi: 10.1103/PhysRevC.94.065203
Citations: PlumX Metrics

2015AL05      Phys.Rev. C 91, 025205 (2015)

I.G.Alekseev, V.A.Andreev, I.G.Bordyuzhin, W.J.Briscoe, Ye.A.Filimonov, V.V.Golubev, A.B.Gridnev, D.V.Kalinkin, L.I.Koroleva, N.G.Kozlenko, V.S.Kozlov, A.G.Krivshich, B.V.Morozov, V.M.Nesterov, D.V.Novinsky, V.V.Ryltsov, M.Sadler, B.M.Shurygin, I.I.Strakovsky, A.D.Sulimov, V.V.Sumachev, D.N.Svirida, V.I.Tarakanov, V.Yu.Trautman, R.L.Workman

High-precision measurements of πp elastic differential cross sections in the second resonance region

doi: 10.1103/PhysRevC.91.025205
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetF1257.

2015SV01      Phys.Rev. C 91, 015207 (2015)

A.Svarc, M.Hadzimehmedovic, H.Osmanovic, J.Stahov, R.L.Workman

Pole structure from energy-dependent and single-energy fits to GWU-SAID πN elastic scattering data

doi: 10.1103/PhysRevC.91.015207
Citations: PlumX Metrics

2014SV02      Phys.Rev. C 89, 065208 (2014)

A.Svarc, M.Hadzimehmedovic, H.Osmanovic, J.Stahov, L.Tiator, R.Workman

Pole positions and residues from pion photoproduction using the Laurent-Pietarinen expansion method

doi: 10.1103/PhysRevC.89.065208
Citations: PlumX Metrics

2013SV02      Phys.Rev. C 88, 035206 (2013)

A.Svarc, M.Hadzimehmedovic, H.Osmanovic, J.Stahov, L.Tiator, R.L.Workman

Introducing the Pietarinen expansion method into the single-channel pole extraction problem

doi: 10.1103/PhysRevC.88.035206
Citations: PlumX Metrics

2013WO03      Phys.Rev. C 87, 068201 (2013)

R.L.Workman, L.Tiator, A.Sarantsev

Baryon photo-decay amplitudes at the pole

doi: 10.1103/PhysRevC.87.068201
Citations: PlumX Metrics

2012BR16      Phys.Rev. C 86, 065207 (2012)

W.J.Briscoe, A.E.Kudryavtsev, P.Pedroni, I.I.Strakovsky, V.E.Tarasov, R.L.Workman

Evaluation of the γn → \p-p differential cross section in the Δ-isobar region

NUCLEAR REACTIONS 1n(γ, π-)p, E=301-455 MeV; analyzed σ(θ, E) from several experimental data sets for 2H(γ, π-p)p, E=301-455 MeV reaction.

doi: 10.1103/PhysRevC.86.065207
Citations: PlumX Metrics

2012CH32      Phys.Rev. C 86, 015206 (2012)

W.Chen, H.Gao, W.J.Briscoe, D.Dutta, A.E.Kudryavtsev, M.Mirazita, M.W.Paris, P.Rossi, S.Stepanyan, I.I.Strakovsky, V.E.Tarasov, R.L.Workman

Amplitude analysis of γn → π-p data above 1 GeV

doi: 10.1103/PhysRevC.86.015206
Citations: PlumX Metrics

2012WO02      Phys.Rev. C 85, 025201 (2012)

R.L.Workman, W.J.Briscoe, M.W.Paris, I.I.Strakovsky

Updated SAID analysis of pion photoproduction data

doi: 10.1103/PhysRevC.85.025201
Citations: PlumX Metrics

2012WO05      Phys.Rev. C 86, 015202 (2012)

R.L.Workman, M.W.Paris, W.J.Briscoe, I.I.Strakovsky

Unified Chew-Mandelstam SAID analysis of pion photoproduction data

doi: 10.1103/PhysRevC.86.015202
Citations: PlumX Metrics

2012WO06      Phys.Rev. C 86, 035202 (2012)

R.L.Workman, R.A.Arndt, W.J.Briscoe, M.W.Paris, I.I.Strakovsky

Parameterization dependence of T-matrix poles and eigenphases from a fit to πN elastic scattering data

doi: 10.1103/PhysRevC.86.035202
Citations: PlumX Metrics

2011LA16      J.Korean Phys.Soc. 59, 995s (2011)

A.B.Laptev, R.C.Haight, R.A.Arndt, W.J.Briscoe, M.W.Paris, I.I.Strakovsky, R.L.Workman

The Recent Absolute Total np and pp Cross Section Determinations: Quality of Data Description and Prediction of Experimental Observables

NUCLEAR REACTIONS 1H(p, p), E=0-3000 MeV;1H(n, n), E=0-1300 MeV; calculated, analyzed np and pp SAID facility scattering σ; evaluated σ using partial-wave analysis.

doi: 10.3938/jkps.59.995
Citations: PlumX Metrics

2011WO02      Phys.Rev. C 83, 035201 (2011)


Single-energy amplitudes for pion photoproduction in the first resonance region

doi: 10.1103/PhysRevC.83.035201
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2011WO06      Eur.Phys.J. A 47, 143 (2011)

R.L.Workman, M.W.Paris, W.J.Briscoe, L.Tiator, S.Schumann, M.Ostrick, S.S.Kamalov

Model dependence of single-energy fits to pion photoproduction data

NUCLEAR REACTIONS 1H(γ, π0), E=200-1200 MeV; calculated σ, σ(θ) using MAID with different γ multipolarities. Compared with data.

doi: 10.1140/epja/i2011-11143-y
Citations: PlumX Metrics

2010PA28      Phys.Rev. C 82, 035202 (2010)

M.W.Paris, R.L.Workman

Toward a unified description of hadro- and photoproduction: S-wave π- and η-photoproduction amplitudes

doi: 10.1103/PhysRevC.82.035202
Citations: PlumX Metrics

2009AR07      Nucl.Sci.Eng. 162, 312 (2009)

R.A.Arndt, W.J.Briscoe, A.B.Laptev, I.I.Strakovsky, R.L.Workman

Absolute Total np and pp Cross-Section Determinations

doi: 10.13182/NSE162-312
Citations: PlumX Metrics

2009WO02      Phys.Rev. C 79, 038201 (2009)

R.L.Workman, R.A.Arndt, M.W.Paris

Resonance parameters from K-matrix and T-matrix poles

doi: 10.1103/PhysRevC.79.038201
Citations: PlumX Metrics

2008AR03      Eur.Phys.J. A 35, 311 (2008)

R.Arndt, W.Briscoe, I.Strakovsky, R.Workman

Partial-wave analysis and baryon spectroscopy

NUCLEAR REACTIONS 1H(γ, pπ0), E=600-3000 MeV; analyzed single pion production σ.

doi: 10.1140/epja/i2007-10572-y
Citations: PlumX Metrics

2007AR22      Phys.Rev. C 76, 025209 (2007)

R.A.Arndt, W.J.Briscoe, I.I.Strakovsky, R.L.Workman

Updated analysis of NN elastic scattering to 3 GeV

doi: 10.1103/PhysRevC.76.025209
Citations: PlumX Metrics

2007HA54      Phys.Rev. C 76, 058201 (2007)

H.Haberzettl, R.Workman

Time delay in a multichannel formalism

doi: 10.1103/PhysRevC.76.058201
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2006AR20      Phys.Rev. C 74, 045205 (2006)

R.A.Arndt, W.J.Briscoe, I.I.Strakovsky, R.L.Workman

Extended partial-wave analysis of πN scattering data

NUCLEAR REACTIONS 1H(π+, π+), (π-, π-), (π-, π0), E=threshold-2.6 GeV; analyzed data; deduced partial wave amplitudes, resonance features.

doi: 10.1103/PhysRevC.74.045205
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2006WO01      Phys.Atomic Nuclei 69, 90 (2006)

R.L.Workman, R.A.Arndt, D.M.Manley, J.Tulpan, I.I.Strakovsky

Constraints on Narrow Exotic States from K+p and K0Lp Scattering Data

NUCLEAR REACTIONS 1H(K+, K+), (K0, K0), E ≈ 1500-1700 MeV; analyzed σ; deduced no narrow exotic resonances.

doi: 10.1134/S1063778806010121
Citations: PlumX Metrics

2006WO10      Phys.Rev. C 74, 055207 (2006)


Single-channel fits and K-matrix constraints

doi: 10.1103/PhysRevC.74.055207
Citations: PlumX Metrics

2005AR14      Nucl.Phys. A754, 261c (2005)

R.A.Arndt, I.I.Strakovsky, R.L.Workman

K+N scattering data and exotic Z+ resonances

doi: 10.1016/j.nuclphysa.2004.12.069
Citations: PlumX Metrics

2005AR28      Phys.Rev. C 72, 045202 (2005)

R.A.Arndt, W.J.Briscoe, T.W.Morrison, I.I.Strakovsky, R.L.Workman, A.B.Gridnev

Low-energy ηN interactions: Scattering lengths and resonance parameters

NUCLEAR REACTIONS 1H(π-, X), E at 684.5-770 MeV/c; analyzed η-meson production σ(θ); deduced scattering lengths, resonance parameters.

doi: 10.1103/PhysRevC.72.045202
Citations: PlumX Metrics

2005AR29      Phys.Rev. C 72, 058203 (2005)

R.A.Arndt, W.J.Briscoe, I.I.Strakovsky, R.L.Workman

Helicity-dependent photoabsorption cross sections on the nucleon

NUCLEAR REACTIONS 1n, 1H(γ, X), E ≈ 500-2000 MeV; analyzed single-pion and single-η photoabsorbtion data, contributions to sum rule.

doi: 10.1103/PhysRevC.72.058203
Citations: PlumX Metrics

2005AZ10      Eur.Phys.J. A 26, 79 (2005)

Ya.I.Azimov, R.A.Arndt, I.I.Strakovsky, R.L.Workman, K.Goeke

Search for higher flavor multiplets in partial-wave analyses

doi: 10.1140/epja/i2005-10150-y
Citations: PlumX Metrics

2004AR08      Phys.Rev. C 69, 035208 (2004)

R.A.Arndt, Ya.I.Azimov, M.V.Polyakov, I.I.Strakovsky, R.L.Workman

Nonstrange and other flavor partners of the exotic Θ+ baryon

doi: 10.1103/PhysRevC.69.035208
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2004AR09      Phys.Rev. C 69, 035213 (2004)

R.A.Arndt, W.J.Briscoe, I.I.Strakovsky, R.L.Workman

Dispersion relation constrained partial wave analysis of πN elastic and πN → ηN scattering data: The baryon spectrum

NUCLEAR REACTIONS 1H(π+, π+), (π-, π-), (π-, π0), (π-, X), E=threshold-2.1 GeV; analyzed elastic, charge-exchange, and η production data; deduced parameters, resonance features. Dispersion relation constrained partial wave analysis.

doi: 10.1103/PhysRevC.69.035213
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2004BR48      Fizika(Zagreb) B 13, 115 (2004)

W.J.Briscoe, R.A.Arndt, I.I.Strakovsky, R.L.Workman

Production of pseudoscalar mesons

2004WO15      Phys.Rev. C 70, 028201 (2004)

R.L.Workman, R.A.Arndt, I.I.Strakovsky, D.M.Manley, J.Tulpan

Effect of exotic S = +1 resonances on K0Lp scattering data

NUCLEAR REACTIONS 1H(K0, X), E at 250-550 MeV/c; analyzed σ; deduced exotic resonance contribution.

doi: 10.1103/PhysRevC.70.028201
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2003AR05      Phys.Rev. C 67, 048201 (2003)

R.A.Arndt, I.I.Strakovsky, R.L.Workman

Effect of double-polarization data in fits to single-pion photoproduction

NUCLEAR REACTIONS 1H(γ, π0X), E=800-2000 MeV; analyzed polarization transfer observables, multipole amplitudes.

doi: 10.1103/PhysRevC.67.048201
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2003AR25      Phys.Rev. C 68, 042201 (2003); Erratum Phys.Rev. C 69, 019901 (2004)

R.A.Arndt, I.I.Strakovsky, R.L.Workman

K+-nucleon scattering and exotic S = +1 baryons

NUCLEAR REACTIONS 1n, 1H(K+, K+), E < 2.65 GeV; analyzed invariant mass spectra; deduced resonance features.

doi: 10.1103/PhysRevC.68.042201
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2003AR28      Nucl.Phys. A721, 769c (2003)

R.A.Arndt, W.J.Briscoe, G.V.O'Rielly, I.I.Strakovsky, R.L.Workman

Photoproduction of Pseudoscalar Mesons

NUCLEAR REACTIONS 1H(γ, X), E ≈ 0.4-1.4 GeV; analyzed pseudoscalar meson production σ, σ(θ).

doi: 10.1016/S0375-9474(03)01177-1
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2003AZ06      Phys.Rev. C 68, 045204 (2003)

Ya.I.Azimov, R.A.Arndt, I.I.Strakovsky, R.L.Workman

Light baryon resonances: Restrictions and perspectives

doi: 10.1103/PhysRevC.68.045204
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2002AR18      Phys.Rev. C 66, 055213 (2002)

R.A.Arndt, W.J.Briscoe, I.I.Strakovsky, R.L.Workman

Analysis of pion photoproduction data

NUCLEAR REACTIONS 1n(π0, γX), (π+, γX), E=1-2 GeV; 1H(π0, γX), (π-, γX), E=1-2 GeV; analyzed σ(θ), partial wave amplitudes.

doi: 10.1103/PhysRevC.66.055213
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2002KA67      Phys.Rev. C 66, 065206 (2002)

S.S.Kamalov, L.Tiator, D.Drechsel, R.A.Arndt, C.Bennhold, I.I.Strakovsky, R.L.Workman

Dispersion relation analysis of neutral pion photoproduction and electroproduction at threshold

NUCLEAR REACTIONS 1H(γ, π0), (e, e'π0), E ≈ threshold; analyzed data; deduced multipole contributions. Dispersion relation analysis.

doi: 10.1103/PhysRevC.66.065206
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2002ZH20      Phys.Rev. C65, 065204 (2002)

Q.Zhao, J.S.Al-Khalili, Z.-P.Li, R.L.Workman

Pion Photoproduction on the Nucleon in the Quark Model

NUCLEAR REACTIONS 1H(γ, π+), (γ, π0), E ≈ 200-700 MeV; 1n(γ, π-), (γ, π0), E ≈ 200-700 MeV; calculated σ, σ(θ), polarization observables. Quark model, comparison with data.

doi: 10.1103/PhysRevC.65.065204
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2001AD05      Phys.Rev. C63, 054606 (2001)

F.V.Adamian, A.Yu.Buniatian, G.S.Frangulian, P.I.Galumian, V.H.Grabsky, A.V.Hairapetian, H.H.Hakopian, V.K.Hoktanian, J.V.Manukian, A.M.Sirunian, A.H.Vartapetian, H.H.Vartapetian, V.G.Volchinsky, R.A.Arndt, I.I.Strakovsky, R.L.Workman

Measurement of the Cross Section Asymmetry of the Reaction γp → π0p in the Resonance Energy Region Eγ = 0.5-1.1 GeV

NUCLEAR REACTIONS 1H(polarized γ, π0), E=0.5-1.1 GeV; measured cross section asymmetry Σ. Comparison with previous work, model predictions.

doi: 10.1103/PhysRevC.63.054606
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2001DA02      Phys.Rev. C63, 025210 (2001)

R.M.Davidson, R.Workman

Form Factors and Photoproduction Amplitudes

NUCLEAR REACTIONS 1H(γ, X), E ≈ 1-4 GeV; analyzed meson production σ; deduced form-factor modification.

doi: 10.1103/PhysRevC.63.025210
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2001DA09      Phys.Rev. C63, 058201 (2001)

R.M.Davidson, R.Workman

Effect of Form Factors in Fits to Photoproduction Data

NUCLEAR REACTIONS 1H(γ, π+), E=1002 MeV; analyzed σ(θ). Several form factors compared.

doi: 10.1103/PhysRevC.63.058201
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2000AR12      Phys.Scr. T87, 62 (2000)

R.A.Arndt, I.I.Strakovsky, R.L.Workman, M.M.Pavan

Sensitivity to the Pion-Nucleon Coupling Constant in Partial-Wave Analyses of πN → πN, NN → NN, and γN → πN

doi: 10.1238/Physica.Topical.087a00062
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2000AR14      Phys.Rev. C62, 034005 (2000)

R.A.Arndt, I.I.Strakovsky, R.L.Workman

Nucleon-Nucleon Elastic Scattering to 3 GeV

NUCLEAR REACTIONS 1H(n, n), (p, p), E < 3 GeV; analyzed polarized, unpolarized data; deduced partial wave amplitudes, phase shift parameters.

doi: 10.1103/PhysRevC.62.034005
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2000PA46      Phys.Scr. T87, 65 (2000)

M.M.Pavan, R.A.Arndt, I.I.Strakovsky, R.L.Workman

Determination of the πNN Coupling Constant in the VPI/GWU πN → πN Partial-Wave and Dispersion Relation Analysis

doi: 10.1238/Physica.Topical.087a00065
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2000WO10      Phys.Rev. C62, 048201 (2000)

R.Workman, R.A.Arndt, I.I.Strakovsky

Extraction of the D13(1520) Photon-Decay Couplings from Pion- and η-Photproduction data

NUCLEAR REACTIONS 1H(γ, π0), E=762 MeV; analyzed σ(θ), recoil polarization; deduced D13 resonance decay couplings, related features. Comparison with η-production data.

doi: 10.1103/PhysRevC.62.048201
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1999DA06      Phys.Rev. C59, 1059 (1999)

R.M.Davidson, N.C.Mukhopadhyay, M.S.Pierce, R.A.Arndt, I.I.Strakovsky, R.L.Workman

Problems with Extraction of the Nucleon to Δ(1232) Photonic Amplitudes

NUCLEAR REACTIONS 1H(γ, π0), E=340 MeV; analyzed σ(θ); deduced little model dependence.

doi: 10.1103/PhysRevC.59.1059
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1999WO02      Phys.Rev. C59, 1810 (1999)

R.L.Workman, R.A.Arndt

Stability of the E2/M1 Ratio at the T-Matrix Pole

doi: 10.1103/PhysRevC.59.1810
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1999WO05      Phys.Rev. C59, 3441 (1999)


Pole versus Breit-Wigner Resonance Description of the Orbitally Excited Baryons

doi: 10.1103/PhysRevC.59.3441
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1998AR18      Phys.Rev. C58, 3636 (1998)

R.A.Arndt, A.M.Green, R.L.Workman, S.Wycech

Energies and Residues of the Nucleon Resonances N(1535) and N(1650)

NUCLEAR STRUCTURE 1n, 1H; calculated resonances E, Γ, pole positions.

doi: 10.1103/PhysRevC.58.3636
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1998CA49      Phys.Rev. D59, 014032 (1998)

S.Capstick, R.Workman

Δ Isobar Masses, Large Nc Relations, and the Quark Model

doi: 10.1103/PhysRevD.59.014032
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1997AL07      Phys.Rev. C55, 2049 (1997)

I.G.Alekseev, V.P.Kanavets, B.V.Morozov, D.N.Svirida, S.P.Kruglov, A.A.Kulbardis, V.V.Sumachev, R.A.Arndt, I.I.Strakovsky, R.L.Workman

Influence of Spin-Rotation Measurements on Partial-Wave Analyses of Elastic Pion-Nucleon Scattering

NUCLEAR REACTIONS 1H(π+, π+), E=1.3 GeV; analyzed spin rotation parameter vs θ, partial wave amplitudes; deduced Barrelet transformation, spin rotation influences on amplitude.

doi: 10.1103/PhysRevC.55.2049
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1997AR11      Phys.Rev. C56, 577 (1997)

R.A.Arndt, I.I.Strakovsky, R.L.Workman

Pion Photoproduction in the Δ Resonance Region

doi: 10.1103/PhysRevC.56.577
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1997AR12      Phys.Rev. C56, 579 (1997)

R.A.Arndt, I.I.Strakovsky, R.L.Workman

Comment on ' Measurement of the π+p(pol) Analyzing Power at 68.3 MeV '

NUCLEAR REACTIONS 1H(π+, π+), E=68.3 MeV; analyzed data analyses; deduced analyzing power role f2, Σ amplitude. Polarized target.

doi: 10.1103/PhysRevC.56.579
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1997AR26      Phys.Rev. C56, 3005 (1997)

R.A.Arndt, H.O.Chang, I.I.Strakovsky, R.L.Workman, F.Dohrmann

Nucleon-Nucleon Elastic Scattering Analysis to 2.5 GeV

NUCLEAR REACTIONS 1H(p, p), E=0-2400 MeV; compiled, analyzed isovector, isoscalar partial wave amplitudes, total σ, σ(θ) for some energies.

doi: 10.1103/PhysRevC.56.3005
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1997CH20      Phys.Rev. C56, 635 (1997)

H.O.Chang, R.A.Arndt, I.I.Strakovsky, R.L.Workman

Combined Analysis of the Reactions pp → pp, πd → πd, and πd → pp

NUCLEAR REACTIONS 1H(p, X), (p, p), E ≈ 2-2.4 GeV; analyzed elastic, total σ vs E. 2H(π, π), (π, 2p), E ≈ 2-2.4 GeV; analyzed amplitudes vs E.

doi: 10.1103/PhysRevC.56.635
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1997WO08      Phys.Rev. C56, 1645 (1997)


Δ+ Mass Reexamined

doi: 10.1103/PhysRevC.56.1645
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1997WO10      Phys.Rev.Lett. 79, 4511 (1997)


E2/M1 Ratio from the Mainz p(γ(pol), p)π0 Data

doi: 10.1103/PhysRevLett.79.4511
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1996AR01      Phys.Rev. C53, 430 (1996)

R.A.Arndt, I.I.Strakovsky, R.L.Workman

Updated Resonance Photodecay Amplitudes to 2 GeV

doi: 10.1103/PhysRevC.53.430
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1996KE02      Phys.Rev. C53, 1434 (1996)

G.Keaton, R.Workman

Amplitude Ambiguities in Pseudoscalar Meson Photoproduction

doi: 10.1103/PhysRevC.53.1434
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1996KE10      Phys.Rev. C54, 1437 (1996)

G.Keaton, R.Workman

Ambiguities in the Partial-Wave Analysis of Pseudoscalar-Meson Photoproduction

doi: 10.1103/PhysRevC.54.1437
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1996LI03      Phys.Rev. C53, R549 (1996)

Z.Li, R.Workman

Do We Have Three S11 Resonances in the Second Resonance Region ( Question )

doi: 10.1103/PhysRevC.53.R549
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1995AR20      Phys.Rev. C52, 2120 (1995)

R.A.Arndt, I.I.Strakovsky, R.L.Workman, M.M.Pavan

Updated Analysis of πN Elastic Scattering Data to 2.1 GeV: The baryon spectrum

NUCLEAR REACTIONS 1H(π-, π-), (π+, π+), E ≤ 2.1 GeV; analyzed energy-angle distribution data; deduced resonance parameters. Breit-Wigner fits.

doi: 10.1103/PhysRevC.52.2120
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1995AR21      Phys.Rev. C52, 2246 (1995)

R.A.Arndt, I.I.Strakovsky, R.L.Workman

Extraction of the πNN Coupling Constant from NN Scattering Data

NUCLEAR REACTIONS 1n(p, p), E < 350 MeV; analyzed σ(θ); deduced πNN-coupling constant.

doi: 10.1103/PhysRevC.52.2246
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1994AR05      Phys.Rev. C49, 2729 (1994)

R.A.Arndt, R.L.Workman, M.M.Pavan

Pion-Nucleon Partial-Wave Analysis with Fixed-t Dispersion Relation Constraints

doi: 10.1103/PhysRevC.49.2729
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1994AR16      Phys.Rev. C50, 1796 (1994)

R.A.Arndt, I.I.Strakovsky, R.L.Workman

Analysis of πd Elastic Scattering Data to 500 MeV

NUCLEAR REACTIONS 2H(π+, π+), (π-, π-), E ≤ 500 MeV; analyzed σ(θ), σ(E), analyzing power data.

doi: 10.1103/PhysRevC.50.1796
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1994AR18      Phys.Rev. C50, 2731 (1994)

R.A.Arndt, I.I.Strakovsky, R.L.Workman

Update Analysis of NN Elastic Scattering Data to 1.6 GeV

NUCLEAR REACTIONS 1n, 1H(p, p), E ≤ 1.6 GeV; analyzed data; deduced πNN coupling constant dependence.

doi: 10.1103/PhysRevC.50.2731
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1993AR04      Phys.Rev. C48, 474 (1993)

R.A.Arndt, I.I.Strakovsky, R.L.Workman

Does the πNN Coupling ' Constant ' Vary with Energy ( Question )

NUCLEAR REACTIONS 1H(p, p), E ≤ 800 MeV; analyzed recent data analyses; deduced NΔ-channel role in πNN-coupling constant extraction.

doi: 10.1103/PhysRevC.48.474
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1993AR11      Phys.Rev. C48, 1926 (1993); Erratum Phys.Rev. C49 1229 (1994)

R.A.Arndt, I.I.Strakovsky, R.L.Workman, D.V.Bugg

Analysis of the Reaction π+d → pp to 500 MeV

NUCLEAR REACTIONS 2H(π+, 2p), E=500 MeV; analyzed σ(θ), deuteron vector analyzing power, 2p-spin correlation parameter; deduced dominant partial wave amplitude characteristics. Energy-dependent approach.

doi: 10.1103/PhysRevC.48.1926
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1992AR16      Phys.Rev. D45, 3995 (1992)

R.A.Arndt, L.D.Roper, R.L.Workman, M.W.McNaughton

Nucleon-Nucleon Partial-Wave Analysis to 1.6 GeV

NUCLEAR REACTIONS 1n, 1H(p, p), E < 1.6 GeV; analyzed data; deduced 1D2, 3F3, 3P2, 3F2 partial wave structure. Energy dependent, energy independent analyses.

doi: 10.1103/PhysRevD.45.3995
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1992AR22      Phys.Rev. D46, 1192 (1992)

R.A.Arndt, R.L.Workman

Uncertainties in np Cross Sections from 25-225 MeV

NUCLEAR REACTIONS 1H(n, n), E=25-225 MeV; analyzed σ(θ), polarization data; deduced limits on overall uncertainities.

doi: 10.1103/PhysRevD.46.1192
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1992HY01      Phys.Rev. D46, 961 (1992)

J.S.Hyslop, R.A.Arndt, L.D.Roper, R.L.Workman

Partial-Wave Analysis of K+-Nucleon Scattering

NUCLEAR REACTIONS 2H(K+, X), (K+, K+), E < 2.65 GeV; analyzed data; deduced scattering lengths.

doi: 10.1103/PhysRevD.46.961
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1990AR15      Phys.Rev. C42, 1853 (1990)

R.A.Arndt, R.L.Workman, Z.Li, L.D.Roper

Partial-Wave Analysis of Pion Photoproduction

NUCLEAR REACTIONS 1H(γ, pπ0), (γ, nπ+), 1n(γ, nπ0), (γ, pπ-), E ≤ 1 GeV; analyzed photo pion production data; deduced energy dependent solutions. Energy dependent partial wave analysis.

doi: 10.1103/PhysRevC.42.1853
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1990AR16      Phys.Rev. C42, 1864 (1990)

R.A.Arndt, R.L.Workman, Z.Li, L.D.Roper

Pion Photoproduction Resonance Couplings in the Second Resonance Region

NUCLEAR REACTIONS 1H(γ, pπ), (γ, nπ), 1n(γ, pπ), (γ, nπ), E ≤ 1 GeV; analyzed data; deduced resonance couplings.

doi: 10.1103/PhysRevC.42.1864
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1990MI06      Phys.Rev. D41, 2689 (1990)

K.Michaelian, P.Kitching, D.A.Hutcheon, R.Abegg, G.H.Coombes, W.K.Dawson, H.W.Fearing, H.Fielding, G.Gaillard, P.Green, L.G.Greeniaus, M.Hugi, C.A.Miller, G.C.Neilson, W.C.Olsen, J.Soukup, N.R.Stevenson, J.Wesick, R.L.Workman

Proton-Proton Bremsstrahlung at 280 MeV

NUCLEAR REACTIONS 1H(polarized p, γ), E=280 MeV; measured bremsstrahlung σ(θ); deduced free nucleon-nucleon interaction off-shell effects.

doi: 10.1103/PhysRevD.41.2689
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1990NA10      Phys.Rev. D41, 2323 (1990)

S.Nam, R.L.Workman

Generalized Skyrme Model with Pion Masses

NUCLEAR STRUCTURE 1n, 1H; calculated charge densities. Generalized Skyrme model, pion masses.

doi: 10.1103/PhysRevD.41.2323
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1990WO02      Phys.Rev. C41, 1688 (1990)

R.L.Workman, H.W.Fearing

Radiative Capture of Kaons by the Deuteron and the (Lambda-n) Scattering Lengths

NUCLEAR REACTIONS 2H(K-, γ), E not given; calculated Eγ, Iγ; deduced (lambda-n) scattering length.

doi: 10.1103/PhysRevC.41.1688
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1987KI07      Nucl.Phys. A463, 87c (1987)

P.Kitching, D.A.Hutcheon, K.Michaelian, R.Abegg, H.Coombes, W.K.Dawson, H.Fielding, G.Gaillard, P.Green, L.G.Greeniaus, M.Hugi, C.A.Miller, G.C.Neilson, W.C.Olsen, J.Soukup, N.R.Stevenson, J.Wesick, H.W.Fearing, R.L.Workman

Polarised Proton-Proton Bremsstrahlung

NUCLEAR REACTIONS 1H(polarized p, p'γ), E=280 MeV; measured analyzing power vs θγ. Liquid hydrogen target. Soft photon approximation, potential model calculations.

doi: 10.1016/0375-9474(87)90650-6
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