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Search: Author = A.Svarc

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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

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
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2022SV02      Phys.Rev. C 105, 024614 (2022)

A.Svarc, Y.Wunderlich, L.Tiator

Application of the single-channel, single-energy amplitude and partial-wave analysis method to K+Λ photoproduction

NUCLEAR REACTIONS 1H(γ, K+Λ), E(cm)=1625-2296 MeV; analyzed σ(θ) from CLAS(2006BR06, 2010MC02, 2016PA25) and GRAAL (2007LL01); deduced photoproduction multipoles. Amplitude and partial-wave analysis (AA-PWA).

doi: 10.1103/PhysRevC.105.024614
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2021OS03      Phys.Rev. C 104, 034605 (2021)

H.Osmanovic, M.Hadzimehmedovic, R.Omerovic, J.Stahov, V.Kashevarov, M.Ostrick, L.Tiator, A.Svarc

Single-energy partial-wave analysis for pion photoproduction with fixed-t analyticity

NUCLEAR REACTIONS 1H(polarized γ, π0p), (polarized γ, π+n), 1n(polarized γ, π-p), (polarized γ, π0n), W<2.2 GeV; analyzed experimental world collection of data from several laboratories; deduced helicity amplitudes, polarization observables, electric and magnetic isoscalar and isovector multipoles for different isospins using fixed-t analyticity constraining method for single-energy partial wave analysis (SE PWA) in pion photoproduction. Compiled experimental world data for π0p, π+n and π-p channels from experiments at A2MAMI, CLAS, CBELSA/TAPS

doi: 10.1103/PhysRevC.104.034605
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2021SV01      Phys.Rev. C 104, 014605 (2021)


Each single-energy, single-channel partial-wave analysis is inherently model-dependent

doi: 10.1103/PhysRevC.104.014605
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2020SV01      Phys.Rev. C 102, 064609 (2020)

A.Svarc, Y.Wunderlich, L.Tiator

Amplitude- and truncated partial-wave analyses combined: A single-channel method for extracting photoproduction multipoles directly from measured data

NUCLEAR REACTIONS 1H(polarized γ, ηp), (polarized γ, π0p), E=710-1470 MeV; analyzed experimental σ(θ, E) data from CBELSA/TAPS (2020, PL-B 803, 135323), A2@MAMI (2016An07), GRAAL (2007Ba67), and A2@MAMI (2010Mc05) collaborations for photoproduction of mesons; deduced photoproduction multipoles for partial waves directly from the experimental data by combining amplitude- and truncated partial-wave analyses.

doi: 10.1103/PhysRevC.102.064609
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2019OS04      Phys.Rev. C 100, 055203 (2019)

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

Single-energy partial wave analysis for π0 photoproduction on the proton with fixed-t analyticity imposed

NUCLEAR REACTIONS 1H(γ, π0p), (polarized γ, π0p), E(cm)=1.07-1.9 GeV; analyzed experimental differential σ(E) data from A2@MAMI, DAPHNE, MAMI, CBELSA/TAPS and GRAAL collaborations; deduced electric and magnetic multipoles up to l=3. Fixed-t single energy partial-wave analysis (SE PWA) of π0 photoproduction on the world collection of data.

doi: 10.1103/PhysRevC.100.055203
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2018GO05      Phys.Rev. C 97, 035204 (2018)

B.Golli, H.Osmanovic, S.Sirca, A.Svarc

Genuine quark state versus dynamically generated structure for the Roper resonance

doi: 10.1103/PhysRevC.97.035204
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2018OS01      Phys.Rev. C 97, 015207 (2018)

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

Fixed-t analyticity as a constraint in single-energy partial-wave analyses of meson photoproduction reactions

NUCLEAR REACTIONS 1H(γ, pη), E=1487-1850 MeV; analyzed differential σ(E, θ) for polarization observables experimental data at MAMI and GRAAL facilities using analytical constraints from fixed-t dispersion relations in partial wave analysis of η photoproduction data.

doi: 10.1103/PhysRevC.97.015207
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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
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2018SV03      Phys.Rev. C 98, 045206 (2018)

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

Role of angle-dependent phase rotations of reaction amplitudes in η photoproduction on protons

NUCLEAR REACTIONS 1H(γ, η), E(cm)=1.5-2.0 GeV; calculated E0+η and all η photoproduction multipoles using Kent State University, Bonn-Gatchina, Julich-Bonn, and Mainz EtaMAID models, differential σ(θ) using partial wave analysis. Comparison with experimental data from MAMI and GRAAL collaborations.

doi: 10.1103/PhysRevC.98.045206
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2018TI10      Eur.Phys.J. A 54, 210 (2018)

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

Eta and etaprime photoproduction on the nucleon with the isobar model EtaMAID2018

NUCLEAR REACTIONS 1H(γ, η), (γ, η')1H, E ≈ 1-3 GeV;1n(γ, η)1n, E ≈ 1-3 GeV; calculated σ using EtaMAID2018 code (updated isobar model EtaMAID); compared with published experimental data.

doi: 10.1140/epja/i2018-12643-x
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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
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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
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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
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2014SV01      Phys.Rev. C 89, 045205 (2014)

A.Svarc, M.Hadzimehmedovic, R.Omerovic, H.Osmanovic, J.Stahov

Poles of Karlsruhe-Helsinki KH80 and KA84 solutions extracted by using the Laurent-Pietarinen method

doi: 10.1103/PhysRevC.89.045205
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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

2013SV01      Phys.Rev. C 87, 067001 (2013)


Examining potential shortcomings in using phase shifts as a link between experiment and QCD

doi: 10.1103/PhysRevC.87.067001
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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
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2011CE05      Phys.Rev. C 84, 015205 (2011)

S.Ceci, M.Doring, C.Hanhart, S.Krewald, U.-G.Meissner, A.Svarc

Relevance of complex branch points for partial wave analysis

doi: 10.1103/PhysRevC.84.015205
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2011HA40      Phys.Rev. C 84, 035204 (2011)

M.Hadzimehmedovic, S.Ceci, A.Svarc, H.Osmanovic, J.Stahov

Poles as the only true resonant-state signals extracted from a worldwide collection of partial-wave amplitudes using only one, well controlled pole-extraction method

doi: 10.1103/PhysRevC.84.035204
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2011OS02      Phys.Rev. C 84, 035205 (2011)

H.Osmanovic, S.Ceci, A.Svarc, M.Hadzimehmedovic, J.Stahov

Stability of the Zagreb realization of the Carnegie-Mellon-Berkeley coupled-channels unitary model

doi: 10.1103/PhysRevC.84.035205
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2010BA38      Phys.Rev. C 82, 038203 (2010)

M.Batinic, S.Ceci, A.Svarc, B.Zauner

Poles of the Zagreb analysis partial-wave T matrices

doi: 10.1103/PhysRevC.82.038203
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2010TI08      Phys.Rev. C 82, 055203 (2010)

L.Tiator, S.S.Kamalov, S.Ceci, G.Y.Chen, D.Drechsel, A.Svarc, S.Yang

Singularity structure of the πN scattering amplitude in a meson-exchange model up to energies W≤2.0 GeV

doi: 10.1103/PhysRevC.82.055203
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2008CA12      Eur.Phys.J. A 35, 253 (2008)

S.Capstick, A.Svarc, L.Tiator, J.Gegelia, M.M.Giannini, E.Santopinto, C.Hanhart, S.Scherer, T.-S.H.Lee, T.Sato, N.Suzuki

The physical meaning of scattering matrix singularities in coupled-channel formalisms BRAG 2007 Workshop summary

doi: 10.1140/epja/i2007-10576-1
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2006CE02      Few-Body Systems 39, 27 (2006)

S.Ceci, A.Svarc, B.Zauner

The Re-Analysis of the 1700 MeV Structure of the P11 Partial Wave Using the πN → KΛ Production Data

doi: 10.1007/s00601-006-0153-3
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2006CE03      Phys.Rev.Lett. 97, 062002 (2006)

S.Ceci, A.Svarc, B.Zauner

πN → ηN Data Require the Existence of the N(1710) P11 Resonance, Reducing the 1700-MeV Continuum Ambiguity

doi: 10.1103/PhysRevLett.97.062002
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2001TI01      Phys.Rev. D63, 052001 (2001)

W.B.Tippens, V.Abaev, M.Batinic, V.Bekrenev, W.J.Briscoe, R.E.Chrien, M.Clajus, D.Isenhower, N.Kozlenko, S.Kruglov, M.J.Leitch, A.Marusic, T.Moriwaki, T.Morrison, B.M.K.Nefkens, J.C.Peng, P.H.Pile, J.W.Price, D.Rigsby, M.E.Sadler, R.Sawafta, I.Slaus, H.Seyfarth, A.Starostin, I.Supek, R.J.Sutter, A.Svarc, D.B.White

Measurement of Charge Symmetry Breaking by the Comparison of π+d → ppη with π-d → nnη

NUCLEAR REACTIONS 2H(π+, 2pX), (π-, 2nX), E at 655-752 MeV/c; measured η meson production associated invariant mass spectra, σ; deduced charge symmetry breaking features.

doi: 10.1103/PhysRevD.63.052001
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1999CA19      Phys.Rev. C59, R3002 (1999)

S.Capstick, T.-S.H.Lee, W.Roberts, A.Svarc

Evidence for the Fourth P11 Resonance Predicted by the Constituent Quark Model

doi: 10.1103/PhysRevC.59.R3002
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1999CE06      J.Phys.(London) G25, L35 (1999)

S.Ceci, D.Hrupec, A.Svarc

The Importance of the Nucleon-Nucleon Correlations for the ηα S-Wave Scattering Length, and the π0-η Mixing Angle in the Low-Energy ηα Scattering Length Model

NUCLEAR REACTIONS 2H(d, π0), E=1.1 GeV; 2H(d, αX), E not given; analyzed data; deduced ηα S-wave scattering length contributions, related features.

doi: 10.1088/0954-3899/25/6/101
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1998BA39      Phys.Scr. 58, 15 (1998)

M.Batinic, I.Dadic, I.Slaus, A.Svarc, B.M.K.Nefkens, T.-S.H.Lee

The New Determination of the ηN S-Wave Scattering Length from a Three-Channel, Multi-Resonance Amplitude Analysis

1997BA65      Phys.Scr. 56, 321 (1997)

M.Batinic, A.Svarc, T.-S.H.Lee

Near Threshold η Production in Proton-Proton Collisions

NUCLEAR REACTIONS 1H(p, X), E=1260-1360 MeV; analyzed σ; deduced η production mechanism features.

1996BA90      Few-Body Systems 20, 69 (1996)

M.Batinic, A.Svarc

Complete Analysis of the ηN S-Wave Scattering-Length Values and Its Natural Limitations in Any Single-Resonance Model

NUCLEAR REACTIONS 1H(π-, X), E ≈ thershold; calculated η(nucleon)-scattering length, production σ. Single resonance reduction of multi-resonance model.

1995BA33      Phys.Rev. C51, 2310 (1995); Erratum Phys.Rev. C57, 1004 (1998)

M.Batinic, I.Slaus, A.Svarc, B.M.K.Nefkens

πN → (Eta)N and (Eta)N → (Eta)N Partial-Wave T Matrices in a Coupled, Three-Channel Model

NUCLEAR REACTIONS 1H(π-, X), E ≤ 2500 MeV; analyzed σ(E), σ(θ) along with πN-, (eta)N-elastic scattering data. Three-coupled-channels model.

doi: 10.1103/PhysRevC.51.2310
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1995BA77      Phys.Rev. C52, 2188 (1995)

M.Batinic, I.Slaus, A.Svarc

ηN S-Wave Scattering Length in a Three-Coupled-Channel, Multiresonance, Unitary Model

doi: 10.1103/PhysRevC.52.2188
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1994BA53      Phys.Rev. C50, 1300 (1994)

M.Batinic, T.-S.H.Lee, M.P.Locher, Y.Lu, A.Svarc

Off-Shell Effects for the Reaction pp → πd at High Energies

NUCLEAR REACTIONS 1H(polarized p, π+), E=1.3-2.4 GeV; analyzed σ(θ), analyzing power data; deduced pp distortion role. Relativistic meson rescattering model.

doi: 10.1103/PhysRevC.50.1300
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1993SL02      Acta Phys.Pol. B24, 1857 (1993)

I.Slaus, M.Batinic, A.Marusic, I.Supek, A.Svarc


1992SV01      J.Phys.(London) G18, L11 (1992)


The Pauli Principle is Sufficient to Account for the Broad Structure in pp → π+d at the Invariant Mass of 2.41 GeV

NUCLEAR REACTIONS 1H(p, π+), E=high; analyzed data; deduced Pauli principle role in observed broad structure.

doi: 10.1088/0954-3899/18/1/003
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1991LO01      Z.Phys. A338, 89 (1991)

M.P.Locher, A.Svarc

Pole Expansion of the Deuteron Vertex Functions Revisited

NUCLEAR STRUCTURE 2H; analyzed (e, d) scattering data; deduced S-, D-state vertex function. Relativistic pole approximation.

NUCLEAR REACTIONS 2H(e, e), E not given; analyzed structure function, tensor polarization. Relativistic pole approximation.

doi: 10.1007/BF01279118
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1990LO19      Fizika(Zagreb) 22, 549 (1990)

M.P.Locher, A.Svarc

Deuteron Vertex Functions Including Meson Exchange Corrections

NUCLEAR STRUCTURE 2H; analyzed binding energy, effective radius, quadrupole moment data; deduced S-, D-state vertex functions. Meson exchange corrections.

NUCLEAR REACTIONS 2H(e, e), E not given; analyzed structure function, t20 data; deduced S-, D-state vertex functions. Meson exchange corrections.

1988LO14      Few-Body Systems 5, 59 (1988)

M.P.Locher, A.Svarc

Off-Shell Effects in pp → πd, πd → pp Spin Observables

NUCLEAR REACTIONS 1H(polarized p, π), E=515, 578 MeV; analyzed polarization observable data; deduced off-shell effects in pp-π, πd-pp spin observables.

doi: 10.1007/BF01351269
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1986LO02      Czech.J.Phys. B36, 230 (1986)

M.P.Locher, A.Svarc, M.Batinic

The Reaction pp-πd in the GeV Region

NUCLEAR REACTIONS 2H(p, π+), E=0.525, 0.87, 1.52 GeV; calculated σ(θ). 1H(p, π+), E=1-4 GeV; calculated all helicity amplitudes. Relativistic model.

doi: 10.1007/BF01597151
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1985LO01      J.Phys.(London) G11, 183 (1985)

M.P.Locher, A.Svarc

Energy Dependence of Relativistic Predictions for pp → dγ in the Δ-Resonance Region

NUCLEAR REACTIONS 1H(p, π), (polarized p, π), E=400-800 MeV; calculated σ(θ), asymmetry, spin correlation parameter vs θ. 2H(π, p), E=510-799 MeV; calculated vector polarization vs θ. Unpolarized, polarized targets. Isobar region, single neutron exchange, channel distortion factors.

doi: 10.1088/0305-4616/11/2/005
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1984GR07      Ann.Phys.(New York) 153, 301 (1984)

W.Grein, A.Konig, P.Kroll, M.P.Locher, A.Svarc

Relativistic Study of the Reaction pp → dπ: Formalism and comparison with experiment at T(p) = 578 MeV

NUCLEAR REACTIONS 1H(polarized p, π), E=578 MeV; calculated beam asymmetry, spin correlation parameter vs θ. Relativistic approach, pion-nucleon amplitudes, off-shell effects.

doi: 10.1016/0003-4916(84)90021-6
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1984LO02      Z.Phys. A316, 55 (1984)

M.P.Locher, A.Svarc

Pole Expansion of the Deuteron Vertex Function Constrained by Modern Data

NUCLEAR REACTIONS 2H(e, e), E not given; calculated σ(θ) components, S-, D-state vertex functions; deduced S-, D-state poles. Static properties input, invariant multipole expansion technique.

doi: 10.1007/BF01415661
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1980SV02      J.Phys.(London) G6, 1397 (1980)

A.Svarc, Z.Bajzer

The Extraction of the Neutron-Neutron Scattering Length from Muon Capture by a Deuteron

NUCLEAR REACTIONS 2H(μ-, n) E at rest; calculated neutron spectrum; deduced neutron-neutron off-energy-shell interaction vs neutron-neutron scattering length. Phase space, weak interaction, final state enhancement.

doi: 10.1088/0305-4616/6/11/011
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