N⁎ decays to Nω from new data on γp→ωp

Denisenko, I.; Anisovich, A. V.; Credé, V.; Eberhardt, H.; Klempt, E.; Nikonov, V. A.; Sarantsev, A.; Schmieden, H.; Thoma, U.; Wilson, A.

doi:10.1016/j.physletb.2016.01.061

Cited by 27 publications

(49 citation statements)

References 24 publications

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“…The method employed here satisfies unitarity and the amplitudes are analytic functions in the complex energy plane. The method has recently been improved by introducing a N/D-based method in our fitting [62]. Studies on baryons indicate that the effects on the amplitudes are mostly small, and that changes in the resonance parameters are covered by the errors we have quoted in our analyses based on the K-matrix formalism.…”

Section: Pion-induced Inelastic Reactionsmentioning

confidence: 99%

“…Branching ratios (B.R. in %) for N * → Nω decays from the BnGa PWA, see [62]. Small numbers were reported in [60].…”

Section: Photoproduction Of ω Mesonsmentioning

confidence: 99%

“…Figure 16. Total cross section for γp → pω from the CBELSA/TAPS experiment (•) as a function of the initial photon (E γ ) and center-of-mass (W) energy, see [62,136]. The error bars represent the statistical, the grey band the systematic uncertainty.…”

Section: Photoproduction Of ω Mesonsmentioning

confidence: 99%

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Partial wave analysis

2017

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Abstract. The project A.2 of the SFB/TR16 "Subnuclear Structure of Matter" aimed at a combined multichannel partial wave analysis of all or of most data on pion and photo-induced reactions for invariant masses from the Δ(1232) region to 2300 MeV. In this review the most important results are presented. It is shown that the data and their partial wave analysis have improved our understanding of the dynamics of excited light-quark baryons significantly.

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Section: Pion-induced Inelastic Reactionsmentioning

confidence: 99%

“…Branching ratios (B.R. in %) for N * → Nω decays from the BnGa PWA, see [62]. Small numbers were reported in [60].…”

Section: Photoproduction Of ω Mesonsmentioning

confidence: 99%

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Partial wave analysis

2017

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“…The sum of the observed branching ratios as given in table 2 is 72±14%. Measured are also branching ratios for decays into Nη (10±4%), ΛK (13±5%), and ΣK (6±3% [39]), and into Nω (15±8% [59]). The total sum is already more than, but compatible with, 100%, leaving little room for decays into Nρ.…”

Section: What Has Been Reached?mentioning

confidence: 99%

Spectroscopy of baryon resonances

Beck

Thoma

2017

EPJ Web Conf.

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Abstract. Within project A.1 of the SFB/TR16 "Subnuclear Structure of Matter", a large amount of data on photoproduction reactions has been accumulated at the Bonn Electron Stretcher Accelerator ELSA with the CBELSA/TAPS detector and was analysed in detail. In particular, data have been taken with unpolarized or with linearly or circularly polarized photons and with unpolarized or with longitudinally or transversely polarized protons. Photoproduction off neutrons was studied to determine the helicity amplitudes for the excitation of resonances off neutrons. In a partial wave analysis of the data, new resonances have been found and the properties of new and of known resonances have been determined, including the measurement of partial widths of so far unmeasured decay modes.

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“…Intermediate s-channel resonances were found to be important, with significant contributions from a J P = 3/2 + and J P = 5/2 + states below 1.9 GeV, and an improvement with the additional inclusion of a J P = 3/2 − . Table 1 [53] details the changes the new data sets have in constraining the resonance contribution in ω photoproduction. Fig.…”

Section: Measurements Of Polarisation Observables Andmentioning

confidence: 99%

Photoproduction of Mesons

Schmieden

Клейн

2017

EPJ Web Conf.

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Abstract. B.1 is one of the experimental projects within the CRC 16. It aims at the systematic investigation of the photoproduction of mesons off nucleons in order to understand reaction mechanisms and the relevant degrees of freedom in resonance formation. Of particular interest is the photoproduction of mesons heavier than the pion and resonances involving hidden or open strangeness. Essential hardware contributions have been made to the experimental programme of the CRC 16 through tagging systems, and photon-beam polarisation and polarimetry. A new experiment has been set up within the framework of the BGO-OD collaboration. This combines a forward magnetic spectrometer with a central BGO calorimeter with charged particle recognition and identification. The BGO-OD experiment enables reconstruction of complex final states composed of both charged and neutral particles, complementary to the existing CBELSA/TAPS calorimeter which is optimised for multi-photon final states. Selected results of the 12-year CRC period are presented from both experiments.

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N⁎ decays to Nω from new data on γp→ωp

Cited by 27 publications

References 24 publications

Partial wave analysis

Partial wave analysis

Spectroscopy of baryon resonances

Photoproduction of Mesons

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