Study of photoproduction on hydrogen in a streamer chamber with tagged photons for 1.6 GeV &lt; Eγ &lt; 6.3 GeV Topological and reaction cross sections

Struczinski, W.; Dittmann, P.; Eckardt, V.; Joos, P.; Ladage, A.; Meyer, H.; Notz, D.; Hentschel, G.; Knobloch, Jürgen; Rabe, E.; Taureg, H.; Grimm, M.; Derado, I.; Schacht, P.; Meinke, R.

doi:10.1016/0550-3213(76)90123-1

Cited by 81 publications

(52 citation statements)

References 56 publications

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“…Theoretical analyses can be found in the literature which were performed to interpret the old data of γp → η ′ p [1][2][3]. Zhang et al [4] first analyzed the old data with an effective Lagrangian approach, in which the off-shell contributions from the low-lying resonances in (1.5 ∼ 1.7) GeV were excluded.…”

Section: Introductionmentioning

confidence: 99%

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η′photoproduction on the nucleon in the quark model

Zhong

Zhao

2011

Phys. Rev. C

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A chiral quark-model approach is adopted to study the γp → η ′ p and γn → η ′ n. Good descriptions of the recent observations from CLAS and CBELSA/TAPS are obtained. Both of the processes are governed by S 11 (1535) and u channel background. Strong evidence of an n = 3 shell resonance D 15 (2080) is found in the reactions, which accounts for the bump-like structure around W = 2.1 GeV observed in the total cross section and excitation functions at very forward angles. The S 11 (1920) seems to be needed in the reactions, with which the total cross section near threshold for the γp → η ′ p is improved slightly. The polarized beam asymmetries show some sensitivities to D 13 (1520), although its effects on the differential cross sections and total cross sections are negligible. There is no obvious evidence of the P-, D 13 -, F-and G-wave resonances with a mass around 2.0 GeV in the reactions.

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Section: Introductionmentioning

confidence: 99%

“…Thus, the study of η ′ photoproduction becomes an interest topic in both experiment and theory. However, due to the small production rate for the η ′ via an electromagnetic probe, it had been a challenge for experiment to measure the η ′ production cross section in the photoproduction reaction [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

η′photoproduction on the nucleon in the quark model

Zhong

Zhao

2011

Phys. Rev. C

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“…Finally, few experiments reach the necessary incident photon energies so that there are statistically relevant results for total cross section and angular distributions only from the CLAS and ELSA facilities. Until the end of the 1990s the only data came from old bubble chamber measurements [93,94] at DESY. They were analyzed in 1995 by Zhang, Mukhopadhyay, and Benmerouche [95], preparing the ground for the analysis of the expected results from the modern tagged photon experiments, in the framework of an effective Lagrangian model.…”

Section: Photoproduction Of η -Mesons Off Nucleonsmentioning

confidence: 99%

Production of η and η′ mesons on nucleons and nuclei

Krusche¹,

Wilkin²

2015

Progress in Particle and Nuclear Physics

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The production of η and η mesons in photon-and hadron-induced reactions on free and quasifree nucleons and on nuclei is reviewed. The extensive database on γN → ηN , for both proton and neutron targets, is described in detail and its implications for the search for N resonances much heavier than the dominant S 11 (1535) discussed. Though less is currently known about the production of the η or of ηπ pairs, these also offer tantalizing prospects in the search for the missing isobars. The more limited data available on pion-induced production are still necessary ingredients in the partial wave analysis discussed.The production of the η-meson in pp and pn collisions shows once again the strong influence of the S 11 (1535) isobar, which is in contrast to the relatively weak behaviour seen near threshold for η production. This difference is reflected in the important final state interaction effects of the η in nuclei that may even lead to this meson being "bound" in some systems. The evidence for this is reviewed for both γA and pA collisions. The inclusive photoproduction of η, η , and ηπ pairs from nuclei provides further information regarding the production mechanism and the interaction of the η and η with nuclei and the ηπ pairs may even allow access to low mass ηA systems that are forbidden in direct single-meson photoproduction.

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“…Assuming that the resonance production is the dominant contribution, an isobar analysis [37] of the SAPHIR data shows that the η ′ -photoproduction at photon energies 0.9≤E γ ≤2.6 GeV can be described by the coherent excitation of two resonances, S 11 (1897) and P 11 (1986). However, the presently available data [35][36][37][38] for the η ′ -photoproduction are quite limited. Thus, an evaluation of resonance properties from these data should be considered with caution.…”

Section: Introductionmentioning

confidence: 99%

“…The reaction γp→η ′ p was studied by a number of collaborations, namely ABBHHM [35], AHHM [36] and SAPHIR [37,38]. While ABBHHM and AHHM measured only the total cross section for the photoproduction of the η ′ meson at photon energies 1.67≤E γ ≤5 GeV, the SAPHIR collaboration at ELSA studied the angular spectra of the η ′ mesons produced at photon energies 0.9≤E γ ≤2.6 GeV.…”

Section: Introductionmentioning

confidence: 99%

Photoproduction of ηʹ-mesons from the Proton

Elster¹,

Sibirtsev²,

Krewald³

et al. 2004

AIP Conference Proceedings

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The presently available data for the reaction γp→η ′ p are analyzed in terms of a model in which the dominant production mechanism is the exchange of the vector mesons ω and ρ. To describe the data at photon energies close to the production threshold we introduce a resonance contribution due to the well established S 11 (1535) resonance. Finally we study the contributions due to nucleon exchange to the η ′ photoproduction and find, that those contributions can be seen at large angles in the differential cross section.

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Study of photoproduction on hydrogen in a streamer chamber with tagged photons for 1.6 GeV < Eγ < 6.3 GeV Topological and reaction cross sections

Cited by 81 publications

References 56 publications

η′photoproduction on the nucleon in the quark model

η′photoproduction on the nucleon in the quark model

Production of η and η′ mesons on nucleons and nuclei

Photoproduction of ηʹ-mesons from the Proton

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