Frequency matrix for the calculation of correlation functions in dipolar systems

Sauermann, G.; Wiegand, M.

doi:10.1016/0378-4363(81)90133-9

Cited by 8 publications

(2 citation statements)

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“…Ratio of exclusive proton and neutron cross sections in the TAPS acceptance. The deuteron data are compared to the 4 He-data [17] and to model predictions from Sauermann et al [29] and Kaiser et al [3]. The curves labeled MAID [30] are the predictions from the full MAID model (MAID1) and a truncated version restricted to the S11(1535)-resonance, Born terms and vector meson exchange (MAID2).…”

Section: Discussionmentioning

confidence: 99%

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Exclusive measurement of quasi-free η-photoproduction from deuterium

et al. 2003

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Quasi-free photoproduction of η-mesons from the deuteron has been measured at the tagged photon facility of the Mainz microtron MAMI with the photon spectrometer TAPS for incident photon energies from the production threshold at 630 MeV up to 820 MeV. In a fully exclusive measurement ηmesons and recoil nucleons were detected in coincidence. At incident photon energies above the production threshold on the free nucleon, where final state interaction effects are negligible, an almost constant ratio of σn/σp = 0.66 ± 0.10 was found. At lower incident photon energies the ratio rises due to re-scattering effects. The average ratio agrees with the value extracted from a comparison of the inclusive d(γ, η)X cross section to the free proton cross section via a participant -spectator model for the deuteron cross section (σn/σp = 0.67 ± 0.07). The angular dependence of the ratio agrees with the expected small deviation of neutron and proton cross section from isotropy due to the influence of the D13(1520) resonance. The energy dependence of the ratio in the excitation energy range of the S11(1535) resonance disfavors model predictions which try to explain this resonance as KΣ-bound state.PACS. 13.60.Le Meson production -25.20.Lj photoproduction reactions

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Section: Discussionmentioning

confidence: 99%

“…9. The full curve is a prediction from a coupled channel model by Sauermann et al [29]. The dash-dotted and dotted curves are predictions from the MAID model [30] for the full model and for a truncated model which only takes into account the excitation of the S 11 (1535) resonance, Born terms and vector meson exchange.…”

Section: Discussionmentioning

confidence: 99%