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NSR database version of April 24, 2024.

Search: Author = U.Thoma

Found 37 matches.

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2021ME22      Eur.Phys.J. A 57, 325 (2021)

V.Metag, M.Nanova, J.Hartmann, P.Mahlberg, F.Afzal, C.Bartels, D.Bayadilov, R.Beck, M.Becker, E.Blanke, K.-T.Brinkmann, S.Ciupka, V.Crede, M.Dieterle, H.Dutz, D.Elsner, F.Frommberger, A.Gridnev, M.Gottschall, M.Gruner, Ch.Hammann, J.Hannappel, W.Hillert, J.Hoff, Ph.Hoffmeister, Ch.Honisch, T.Jude, H.Kalinowsky, F.Kalischewski, I.Keshelashvili, B.Ketzer, P.Klassen, F.Klein, K.Koop, P.Kroenert, B.Krusche, M.Lang, I.Lopatin, F.Messi, W.Meyer, B.Mitlasoczky, J.Muller, J.Mullers, V.Nikonov, V.Novinsky, R.Novotny, D.Piontek, G.Reicherz, L.Richter, T.Rostomyan, S.Runkel, B.Salisbury, A.Sarantsev, D.Schaab, Ch.Schmidt, H.Schmieden, J.Schultes, T.Seifen, V.Sokhoyan, C.Sowa, K.Spieker, N.Stausberg, A.Thiel, U.Thoma, T.Triffterer, M.Urban, G.Urff, H.van Pee, M.Wagner, D.Walther, Ch.Wendel, D.Werthmuller, U.Wiedner, A.Wilson, A.Winnebeck, L.Witthauer, Y.Wunderlich

Observation of a structure in the M invariant mass distribution near 1700 MeV/c2 in the γ p -> p π0 η reaction - The CBELSA/TAPS Collaboration

doi: 10.1140/epja/s10050-021-00634-1
Citations: PlumX Metrics


2020AN07      Eur.Phys.J. A 56, 139 (2020)

A.V.Anisovich, A.V.Sarantsev, V.A.Nikonov, V.Burkert, R.A.Schumacher, U.Thoma, E.Klempt

Hyperon III: K- p - πΣ coupled-channel dynamics in the Λ(1405) mass region

doi: 10.1140/epja/s10050-020-00142-8
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


2019MA79      Eur.Phys.J. A 55, 179 (2019)

M.Matveev, A.V.Sarantsev, V.A.Nikonov, A.V.Anisovich, U.Thoma, E.Klempt

Hyperon I: Partial-wave amplitudes for K-p scattering

doi: 10.1140/epja/i2019-12878-y
Citations: PlumX Metrics


2019SA52      Eur.Phys.J. A 55, 180 (2019)

A.V.Sarantsev, M.Matveev, V.A.Nikonov, A.V.Anisovich, U.Thoma, E.Klempt

Hyperon II: Properties of excited hyperons

doi: 10.1140/epja/i2019-12880-5
Citations: PlumX Metrics


2017AN03      Phys.Rev. C 95, 035211 (2017)

A.V.Anisovich, V.Burkert, E.Klempt, V.A.Nikonov, A.V.Sarantsev, U.Thoma

Scrutinizing the evidence for N(1685)

NUCLEAR REACTIONS 2H(γ, nη), (γ, pη), E=bremsstrahlung photons from 1500-MeV electron beam; analyzed data on the helicity dependence of the reaction with a spectator proton taken by the A2 Collaboration at MAMI in Mainz; discussed the existence of a narrow resonance of Jπ=1/2+ at 1685 keV; deduced that no such resonance is needed to obtain an excellent description and fit of the data fit.

doi: 10.1103/PhysRevC.95.035211
Citations: PlumX Metrics


2017AN17      Phys.Rev. C 96, 055202 (2017)

A.V.Anisovich, V.Burkert, N.Compton, K.Hicks, F.J.Klein, E.Klempt, V.A.Nikonov, A.M.Sandorfi, A.V.Sarantsev, U.Thoma

Neutron helicity amplitudes

NUCLEAR REACTIONS 2H(γ, π-p), (γ, π0n), (γ, nη), (γ, K0Λ), (γ, K+Σ-), 1n(polarized γ, π-p), E=900-2600 MeV; analyzed total σ, differential σ(θ, E), asymmetry data from MAMI and CLAS collaborations; deduced helicity amplitudes for resonances, positive-parity nucleon resonances in the second excitation shell. New Bonn-Gatchina (BnGa) partial wave analysis of photoproduction reactions in deuterons with a spectator proton.

doi: 10.1103/PhysRevC.96.055202
Citations: PlumX Metrics


2017AN19      Eur.Phys.J. A 53, 242 (2017)

A.V.Anisovich, V.Burkert, M.Hadzimehmedovic, D.G.Ireland, E.Klempt, V.A.Nikonov, R.Omerovic, A.V.Sarantsev, J.Stahov, U.Thoma

N* resonances from KΛ amplitudes in sliced bins in energy

NUCLEAR REACTIONS 1H(γ, K+)Λ, E not given;1H(π-, K0)Λ, E not given; calculated, analyzed σ(θ), Λ recoil polarization, spin rotation angle using Laurent+Pietarinen model; compared to ANL and RAL data for masses 1630-2130 MeV; deduced nucleon resonances at about 1.9 GeV with Jπ=(1/2)+, (3/2)+, (1/2)-, (3/2)-, (5/2)-.

doi: 10.1140/epja/i2017-12443-x
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


2016LU01      Nucl.Phys. A948, 93 (2016)

M.F.M.Lutz, J.S.Lange, M.Pennington, D.Bettoni, N.Brambilla, V.Crede, S.Eidelman, A.Gillitzer, W.Gradl, C.B.Lang, V.Metag, T.Nakano, J.Nieves, S.Neubert, M.Oka, S.L.Olsen, M.Pappagallo, S.Paul, M.Pelizaus, A.Pilloni, E.Prencipe, J.Ritman, S.Ryan, Ul.Thoma, U.Uwer, W.Weise

Resonances in QCD

doi: 10.1016/j.nuclphysa.2016.01.070
Citations: PlumX Metrics


2015AN08      Eur.Phys.J. A 51, 72 (2015)

A.V.Anisovich, E.Klempt, B.Krusche, V.A.Nikonov, A.V.Sarantsev, U.Thoma, D.Werthmuller

Interference phenomena in the JP = 1/2- wave in η photoproduction

NUCLEAR REACTIONS 1n(γ, n)η, E=1500-1900 MeV;1H(γ, p)η, E=1500-1900 MeV; measured reaction products; deduced σ, σ(θ), resonance near 1680 MeV, interference pattern of (1/2)- partial wave; calculated, simulated σ, σ(θ), helicity amplitudes using T- and K-matrices couplings within Bonn-Gatchina CCmodel.

doi: 10.1140/epja/i2015-15072-5
Citations: PlumX Metrics


2014AN07      Eur.Phys.J. A 50, 129 (2014)

A.V.Anisovich, R.Beck, V.Burkert, E.Klempt, M.E.McCracken, V.A.Nikonov, A.V.Sarantsev, R.A.Schumacher, U.Thoma

Energy-independent PWA of the reaction γp → K+Λ

doi: 10.1140/epja/i2014-14129-3
Citations: PlumX Metrics


2013AN15      Eur.Phys.J. A 49, 67 (2013)

A.V.Anisovich, V.Burkert, E.Klempt, V.A.Nikonov, A.V.Sarantsev, U.Thoma

Helicity amplitudes for photoexcitation of nucleon resonances off neutrons

doi: 10.1140/epja/i2013-13067-x
Citations: PlumX Metrics


2013AN20      Eur.Phys.J. A 49, 121 (2013)

A.V.Anisovich, R.Beck, E.Klempt, V.A.Nikonov, A.V.Sarantsev, U.Thoma, Y.Wunderlich

Study of ambiguities in π-p → ΛK0 scattering amplitudes

doi: 10.1140/epja/i2013-13121-9
Citations: PlumX Metrics


2013An22      Eur.Phys.J. A 49, 158 (2013)

A.V.Anisovich, E.Klempt, V.A.Nikonov, A.V.Sarantsev, U.Thoma

Sign ambiguity in the KΣ channel

doi: 10.1140/epja/i2013-13158-8
Citations: PlumX Metrics


2012AN02      Eur.Phys.J. A 48, 15 (2012)

A.V.Anisovich, R.Beck, E.Klempt, V.A.Nikonov, A.V.Sarantsev, U.Thoma

Properties of baryon resonances from a multichannel partial wave analysis

doi: 10.1140/epja/i2012-12015-8
Citations: PlumX Metrics


2012AN07      Eur.Phys.J. A 48, 88 (2012)

A.V.Anisovich, R.Beck, E.Klempt, V.A.Nikonov, A.V.Sarantsev, U.Thoma

Pion- and photo-induced transition amplitudes to ΛK, ΣK and Nη

NUCLEAR REACTIONS 1H(π+, K++, E=1700=2200 MeV; calculated σ. Compared with data and other calculations.

doi: 10.1140/epja/i2012-12088-3
Citations: PlumX Metrics


2011AN26      Eur.Phys.J. A 47, 153 (2011)

A.V.Anisovich, E.Klempt, V.A.Nikonov, A.V.Sarantsev, U.Thoma

Nucleon resonances in the fourth-resonance region

doi: 10.1140/epja/i2011-11153-9
Citations: PlumX Metrics


2011AN27      Eur.Phys.J. A 47, 27 (2011)

A.V.Anisovich, E.Klempt, V.A.Nikonov, A.V.Sarantsev, U.Thoma

P -wave excited baryons from pion- and photo-induced hyperon production

doi: 10.1140/epja/i2011-11027-2
Citations: PlumX Metrics


2010AN10      Eur.Phys.J. A 44, 203 (2010)

A.V.Anisovich, E.Klempt, V.A.Nikonov, M.A.Matveev, A.V.Sarantsev, U.Thoma

Photoproduction of pions and properties of baryon resonances from a Bonn-Gatchina partial-wave analysis

doi: 10.1140/epja/i2010-10950-x
Citations: PlumX Metrics


2009AN18      Eur.Phys.J. A 41, 13 (2009)

A.V.Anisovich, I.Jaegle, E.Klempt, B.Krusche, V.A.Nikonov, A.V.Sarantsev, U.Thoma

Photoproduction of η -mesons off neutrons from a deuteron target

doi: 10.1140/epja/i2009-10766-9
Citations: PlumX Metrics


2008NI05      Phys.Lett. B 662, 245 (2008)

V.A.Nikonov, A.V.Anisovich, E.Klempt, A.V.Sarantsev, U.Thoma

Further evidence for N(1900)P13 from photoproduction of hyperons

doi: 10.1016/j.physletb.2008.03.004
Citations: PlumX Metrics


2007AN33      Eur.Phys.J. A 34, 243 (2007)

A.V.Anisovich, V.Kleber, E.Klempt, V.A.Nikonov, A.V.Sarantsev, U.Thoma

Baryon resonances and polarization transfer in hyperon photoproduction

doi: 10.1140/epja/i2007-10503-6
Citations: PlumX Metrics


2006KL09      Eur.Phys.J. A 29, 307 (2006)

E.Klempt, A.V.Anisovich, V.A.Nikonov, A.V.Sarantsev, U.Thoma

Phase motion of baryon resonances

doi: 10.1140/epja/i2006-10092-x
Citations: PlumX Metrics


2005AN07      Eur.Phys.J. A 24, 111 (2005)

A.V.Anisovich, E.Klempt, A.V.Sarantsev, U.Thoma

Partial-wave decomposition of pion and photoproduction amplitudes

doi: 10.1140/epja/i2004-10125-6
Citations: PlumX Metrics


2005AN27      Eur.Phys.J. A 25, 427 (2005)

A.V.Anisovich, A.Sarantsev, O.Bartholomy, E.Klempt, V.A.Nikonov, U.Thoma

Photoproduction of baryons decaying into Nπ and Nη

NUCLEAR REACTIONS 1H(γ, π0), (γ, π+), (γ, X), E ≈ 1200-2500 MeV; analyzed pion and η-meson production σ(θ), σ, related data; deduced resonance features.

doi: 10.1140/epja/i2005-10120-5
Citations: PlumX Metrics


2005SA53      Eur.Phys.J. A 25, 441 (2005)

A.V.Sarantsev, V.A.Nikonov, A.V.Anisovich, E.Klempt, U.Thoma

Decays of baryon resonances into ΛK+, Σ0K+ and Σ+K0

NUCLEAR REACTIONS 1H(γ, K0X), (γ, K+X), E ≈ 1.6-2.3 GeV; analyzed kaon and hyperon production σ(θ), σ, related data; deduced resonance features.

doi: 10.1140/epja/i2005-10121-4
Citations: PlumX Metrics


2004AM04      Eur.Phys.J. C 33, 23 (2004)

C.Amsler, A.V.Anisovich, C.A.Baker, B.M.Barnett, C.J.Batty, P.Blum, K.Braune, V.Crede, K.M.Crowe, M.Doser, W.Dunnweber, D.Engelhardt, M.A.Faessler, R.P.Haddock, F.H.Heinsius, N.P.Hessey, H.Kalinowsky, D.Jamnik, P.Kammel, J.Kisiel, E.Klempt, H.Koch, M.Kunze, U.Kurilla, R.Landua, H.Matthay, C.A.Meyer, F.Meyer-Wildhagen, R.Ouared, K.Peters, B.Pick, M.Ratajczak, C.Regenfus, J.Reinnarth, A.V.Sarantsev, U.Strohbusch, M.Suffert, J.S.Suh, U.Thoma, S.Wallis-Plachner, D.Walther, U.Wiedner

Production and decay of η'(958) and η(1440) in (p-bar)p annihilation at rest

NUCLEAR REACTIONS 1H(p-bar, X), E at rest; measured η-meson production associated invariant mass spectra; deduced branching ratios for decay channels.

doi: 10.1140/epjc/s2003-01540-6
Citations: PlumX Metrics


2003TH12      Eur.Phys.J. A 18, 135 (2003)

U.Thoma

Scalar mesons and the search for the 0++ glueball

doi: 10.1140/epja/i2002-10307-2
Citations: PlumX Metrics


2001BA92      Nucl.Phys. A691, 374c (2001)

J.Barth, C.Bennhold, W.Braun, J.Ernst, K.H.Glander, S.Goers, J.Hannappel, N.Jopen, H.Kalinowsky, F.Klein, E.Klempt, A.Kozela, R.Lawall, J.Link, T.Mart, D.Menze, W.Neuerburg, M.Ostrick, E.Paul, H.van Pee, I.Schulday, W.-J.Schwille, J.Smyrski, U.Thoma, R.Wedemeyer, B.Wiegers, F.W.Wieland, J.Wisskirchen

New Results on η and η' Photoproduction with SAPHIR at ELSA

NUCLEAR REACTIONS 1H(γ, X), E=0.7-2.6 GeV; measured η and η' meson production σ, σ(θ).

doi: 10.1016/S0375-9474(01)01059-4
Citations: PlumX Metrics


2001TH19      Nucl.Phys. A692, 275c (2001)

U.Thoma

Scalar Mesons

doi: 10.1016/S0375-9474(01)01187-3
Citations: PlumX Metrics


2000TH12      Nucl.Phys. A675, 76c (2000)

U.Thoma, for the Crystal Barrel Collaboration

Study of (p-bar)N Annihilations into Five Pions

NUCLEAR REACTIONS 1H(p-bar, X), E at rest; analyzed invariant mass spectra; deduced resonance features.

doi: 10.1016/S0375-9474(00)00217-7
Citations: PlumX Metrics


1999BA99      Phys.Lett. 467B, 147 (1999)

C.A.Baker, B.M.Barnett, C.J.Batty, K.Braune, D.V.Bugg, O.Cramer, V.Crede, N.Djaoshvili, W.Dunnweber, M.A.Faessler, N.P.Hessey, P.Hidas, C.Hodd, D.Jamnik, H.Kalinowsky, J.Kisiel, E.Klempt, C.Kolo, L.Montanet, B.Pick, W.Roethel, A.Sarantsev, I.Scott, C.Strassburger, U.Thoma, C.Volcker, S.Wallis, D.Walther, K.Wittmack, B.S.Zou

The f2(1565) in (p-bar)p → (ωω)π0 Interactions at Rest

NUCLEAR REACTIONS 1H(p-bar, π0X), E at rest; measured (ωω) associated invariant mass spectra; deduced resonance role.

doi: 10.1016/S0370-2693(99)01107-7
Citations: PlumX Metrics


1999TH07      Nucl.Phys. A655, 89c (1999)

U.Thoma

Partial Wave Analysis at the Crystal Barrel Experiment

doi: 10.1016/S0375-9474(99)00185-2
Citations: PlumX Metrics


1998AB15      Phys.Rev. D57, 3860 (1998)

A.Abele, S.Bischoff, P.Blum, N.Djaoshvili, D.Engelhardt, A.Herbstrith, C.Holtzhaussen, M.Tischhauser, J.Adomeit, B.Kammle, J.Meier, P.Schmidt, R.Seibert, U.Strohbusch, C.Amsler, S.von Dombrowski, P.Giarritta, M.Heinzelmann, F.Ould-Saada, C.Pietra, C.Regenfus, S.Spanier, C.A.Baker, C.J.Batty, C.N.Pinder, B.M.Barnett, V.Crede, A.Ehmanns, M.Herz, H.Kalinowsky, E.Klempt, B.Pick, S.Resag, C.Strassburger, U.Thoma, K.Wittmack, M.Benayoun, A.Berdoz, R.McCrady, C.A.Meyer, K.Beuchert, T.Degener, H.Koch, M.Kunz, U.Kurilla, J.Ludemann, H.Matthay, K.Peters, M.Ratajczak, H.Stock, K.Braune, O.Cramer, W.Dunnweber, M.A.Faessler, N.P.Hessey, D.Jamnik, C.Kolo, W.Roethel, C.Volcker, S.Wallis, D.Walther, U.Wiedner, C.Zupancic, T.Case, K.M.Crowe, F.H.Heinsius, P.Kammel, M.Lakata, M.Doser, J.Kisiel, R.Landua, L.Montanet, R.Ouared, R.P.Haddock, P.Hidas, M.Suffert

(p-bar)p Annihilation at Rest into K(L)K(±)π(∓)

NUCLEAR REACTIONS 1H(p-bar, X), E at rest; measured (K(L)K(±)π(∓)) branching ratio; deduced a0(1450) resonance E, Γ.

doi: 10.1103/PhysRevD.57.3860
Citations: PlumX Metrics


1998PL02      Phys.Lett. 444B, 555 (1998)

R.Plotzke, J.Barth, W.Braun, R.Burgwinkel, J.Ernst, K.H.Glander, S.Goers, J.Hannappel, N.Jopen, H.G.Jungst, H.Kalinowsky, U.Kirch, F.Klein, F.-J.Klein, E.Klempt, A.Kozela, R.Lawall, J.Link, D.Menze, W.Neuerburg, M.Ostrick, M.Paganetti, E.Paul, H.van Pee, I.Schulday, W.J.Schwille, J.Smyrski, U.Thoma, L.Tiator, M.Q.Tran, F.Wehnes, B.Wiegers, F.W.Wieland, J.Wisskirchen

Photoproduction of η'-Mesons with the 4π-Detector SAPHIR

NUCLEAR REACTIONS 1H(γ, X), E=0.9-2.6 GeV; measured η' production σ(θ), σ; deduced resonance contributions. Tagged photons, 4π detector.

doi: 10.1016/S0370-2693(98)01444-0
Citations: PlumX Metrics


1996AB32      Nucl.Phys. A609, 562 (1996); Erratum Nucl.Phys. A625, 899 (1997)

A.Abele, J.Adomeit, D.S.Armstrong, C.A.Baker, C.J.Batty, M.Benayoun, A.Berdoz, K.Beuchert, S.Bischoff, P.Blum, K.Braune, D.V.Bugg, T.Case, A.R.Cooper, O.Cramer, K.M.Crowe, H.P.Dietz, N.Djaoshvili, W.Dunnweber, D.Engelhardt, M.Englert, M.A.Faessler, R.P.Haddock, F.H.Heinsius, M.Herz, N.P.Hessey, P.Hidas, C.Holtzhaussen, P.Illinger, D.Jamnik, B.Kammle, P.Kammel, T.Kiel, H.Koch, C.Kolo, M.Lakata, H.Matthay, R.McCrady, J.Meier, C.A.Meyer, L.Montanet, C.N.Pinder, G.Pinter, C.Regenfus, J.Reissmann, W.Rothel, P.Schmidt, I.Scott, R.Seibert, C.Strassburger, U.Strohbusch, M.Suffert, U.Thoma, M.Tischhauser, C.Volcker, D.Walther, B.Zou

Further Analysis of (p-bar)p → 3π0, ηηπ0 and ηπ0π0 at Rest

NUCLEAR REACTIONS 1H(p-bar, X), E at rest; analyzed 3π0, 2ηπ0, η2π0 production data; deduced f0, f2 resonances, widths.

doi: 10.1016/S0375-9474(96)00306-5
Citations: PlumX Metrics


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