Photoproduction of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>η</mml:mi></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>η</mml:mi><mml:mrow><mml:mo>'</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>mesons off protons

Credé, V.; McVeigh, A.; Anisovich, A. V.; Bacelar, J. C. S.; Bantes, R.; Bartholomy, O.; Bayadilov, D.; Beck, R.; Beloglazov, Y. A.; Castelijns, R.; Ehmanns, A.; Elsner, D.; Essig, K.; Ewald, R.; Fabry, I.; Fuchs, Markus; Funke, Chr.; Gothe, R.; Gregor, R.; Gridnev, A.; Gutz, E.; Höeffgen, Stefan K.; Hoffmeister, P.; Horn, I.; Jaeglé, I.; Junkersfeld, J.; Kalinowsky, H.; Kammer, S.; Klein, Frank; Клейн, Ф.; Klempt, E.; Konrad, M.; Kotulla, M.; Krusche, B.; Langheinrich, J.; Löhner, H.; Lopatin, I.; Lotz, J.; Lugert, S.; Menze, D.; Mertens, T.; Messchendorp, J. G.; Metag, V.; Nanova, M.; Nikonov, V. A.; Novinski, D.; Novotny, R.; Ostrick, M.; Schadmand, S.; Shende, S.

doi:10.1103/physrevc.80.055202

Cited by 143 publications

(161 citation statements)

References 105 publications

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“…The latter could possibly be explained by large uncertainties of CBELSA/ TAPS in the photon-flux determination (10% in Ref. [5]). In Fig.…”

Section: Prl 118 212001 (2017) P H Y S I C a L R E V I E W L E T T Ementioning

confidence: 99%

“…The Nð1895Þ1=2 − state is presently listed by the PDG with only two stars [14]. So far, the existing experimental data for η 0 photoproduction, provided by CLAS [4,15] and CBELSA/TAPS [5], are quite scarce, especially in the near-threshold region. Recently, the threshold region attracted more attention after the first results for the beam asymmetry Σ were presented by GRAAL [16], which, although limited in statistics, could not be reproduced by any of the existing models describing η 0 photoproduction [17][18][19][20][21].…”

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confidence: 99%

“…In Fig. 4, the combined γp → ηp differential cross sections from Run III are compared to the results from Run II, CLAS [4], and CBELSA/TAPS [5] at close energy bins. As seen, the results from Run II and Run III are consistent in the overlapping energy range.…”

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confidence: 99%

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Study of η and η′ Photoproduction at MAMI

Kashevarov¹,

Ott²,

Prakhov³

et al. 2017

Phys. Rev. Lett.

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The reactions γp → ηp and γp → η 0 p are measured from their thresholds up to the center-of-mass energy W ¼ 1.96 GeV with the tagged-photon facilities at the Mainz Microtron, MAMI. Differential cross sections are obtained with unprecedented statistical accuracy, providing fine energy binning and full production-angle coverage. A strong cusp is observed in the total cross section for η photoproduction at the energies in the vicinity of the η 0 threshold, W ¼ 1896 MeV (E γ ¼ 1447 MeV). Within the framework of a revised ηMAID isobar model, the cusp, in connection with a steep rise of the η 0 total cross section from its threshold, can only be explained by a strong coupling of the poorly known Nð1895Þ1=2 − state to both ηp and η 0 p. Including the new high-accuracy results in the ηMAID fit to available η and η 0 photoproduction data allows the determination of the Nð1895Þ1=2 − properties.

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“…The latter could possibly be explained by large uncertainties of CBELSA/ TAPS in the photon-flux determination (10% in Ref. [5]). In Fig.…”

Section: Prl 118 212001 (2017) P H Y S I C a L R E V I E W L E T T Ementioning

confidence: 99%

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confidence: 99%

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Study of η and η′ Photoproduction at MAMI

Kashevarov¹,

Ott²,

Prakhov³

et al. 2017

Phys. Rev. Lett.

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“…[30], where they measured the π − p → η n cross section just above the η n threshold. Production experiments of the η meson in other reactions, such as γp → η p [31][32][33][34] and pp → η pp [35][36][37], also give us a good ground to study the η N interaction.…”

Section: Introductionmentioning

confidence: 99%

Theoretical study of photoproduction of anη′Nbound state on a deuteron target with forward proton emission

Sekihara

Sakai

2016

Phys. Rev. C

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Possibilities of observing a signal of an η n bound state are investigated by considering photoproductions of the η and η mesons on a deuteron target with forward proton emission. For this purpose, we take the η n interaction from the linear σ model with a coupling to ηn, in which an s-wave η n bound state can be dynamically generated, and we fix the γp → ηp and η p scattering amplitudes so as to reproduce the experimental cross sections with forward proton emission. By using these γp → η ( ) p and η ( ) n → η ( ) n amplitudes, we calculate cross sections of the γ d → ηnp and η np reactions with forward proton emission in single and η ( ) -exchange double-scattering processes. As a result, we find that the signal of the η n bound state can be seen below the η n threshold in the ηn invariant mass spectrum of the γ d → ηnp reaction and is comparable with the contribution from the quasifree η production above the η n threshold. We also discuss the behavior of the signal of the η n bound state in several experimental conditions and model parameters.

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“…Baryon resonances are broad and widely overlap, especially at higher energies, imposing challenges on the interpretation of experimental data in terms of resonance contributions. Without precise data from many decay channels, it will be difficult or even impossible to accurately determine the properties of well-established resonances, or to confirm or rule out the existence of weakly established resonances or new, so far unobserved states [1].…”

Section: Introductionmentioning

confidence: 99%

Resonance Contributions to $\eta$ Photoproduction on the Nucleon in the Isobaric Model

Burhendi

2017

Omega J. Phys. Phys. Educ.

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The contributions of the resonances S11(1535), S11(1650), and P11(1710) to gamma nucleon → eta nucleon are found. In order to estimate model dependence of the obtained resonance characteristics, an isobaric models used for analysis. For the resonances considered, our analysis yields mass values compatible with those advocated by the Particle Data Group. We emphasise, however, that cross-section data alone are unable to pin down the resonance parameters and it is shown that the beam and or target asymmetries impose more stringent constraints on these parameter values. The amplitude transitions of Feynman diagrams at the center of mass frame used to find amplitude squares involving the s-channel, u-channel, and t-channel on Born term and resonance. The value of the differential cross section on the energy system used by 1.685 MeV up to 2.795 MeV.

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Photoproduction ofηandη'mesons off protons

Cited by 143 publications

References 105 publications

Study of η and η′ Photoproduction at MAMI

Study of η and η′ Photoproduction at MAMI

Theoretical study of photoproduction of anη′Nbound state on a deuteron target with forward proton emission

Resonance Contributions to $\eta$ Photoproduction on the Nucleon in the Isobaric Model

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