Nuclear Science References (NSR)

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
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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
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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 J^π=(1/2)⁺, (3/2)⁺, (1/2)^-, (3/2)^-, (5/2)^-.

doi: 10.1140/epja/i2017-12443-x
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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
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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
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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 J^P = 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
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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
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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
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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
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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
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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
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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⁺)Σ⁺, E=1700=2200 MeV; calculated σ. Compared with data and other calculations.

doi: 10.1140/epja/i2012-12088-3
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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