Status Report on the Normal Conducting CW Racetrack Microtron Cascade "MAMI"

Herminghaus, H.; Dreher, B.; Futeneuer, B.; Kaiser, K.-H.; Kelliher, M. G.; Klein, Richard; Kreidel, H. J.; Loch, M.; Ludwig-Mertin, U.; Merle, K.; Schoeler, H.; Schulze, R.; Semmel, P.; Stephan, G.

doi:10.1109/tns.1983.4336636

Cited by 89 publications

(68 citation statements)

References 4 publications

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“…These detectors were installed in the energy-tagged bremsstrahlung photon beam of the Mainz Microtron (MAMI) [35,36]. The photon energies were determined by using the Glasgow-Mainz tagging spectrometer [37][38][39].…”

Section: Methodsmentioning

confidence: 99%

Measurement of the ω→π0e+e− and η→e+e

Adlarson¹,

Afzal²,

Aguar-Bartolomé³

et al. 2017

Phys. Rev. C

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Measurement of the ω → π 0 e + e − and η → e + e − γ Dalitz decays with the A2 setup at MAMI The Dalitz decays η → e + e − γ and ω → π 0 e + e − have been measured in the γp → ηp and γp → ωp reactions, respectively, with the A2 tagged-photon facility at the Mainz Microtron, MAMI. The value obtained for the slope parameter of the electromagnetic transition form factor of η, Λ −2 η = (1.97 ± 0.11tot ) GeV −2 , is in good agreement with previous measurements of the η → e + e − γ and η → µ + µ − γ decays. The uncertainty obtained in the value of Λ −2 η is lower than in previous results based on the η → e + e − γ decay. The value obtained for the ω slope parameter, Λ −2 ωπ 0 = (1.99 ± 0.21tot) GeV −2 , is somewhat lower than previous measurements based on ω → π 0 µ + µ − , but the results for the ω transition form factor are in better agreement with theoretical calculations, compared to earlier experiments.

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Section: Methodsmentioning

confidence: 99%

Measurement of the ω→π0e+e− and η→e+e

Adlarson¹,

Afzal²,

Aguar-Bartolomé³

et al. 2017

Phys. Rev. C

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“…These detectors were installed at the energy-tagged bremsstrahlung-photon beam produced from the electron beam of the Mainz Microtron (MAMI) [18,19]. In the present experiment, bremsstrahlung photons, produced by the 1508-MeV electrons in a 10-µm Cu radiator and collimated by a 4-mm-diameter Pb collimator, were incident on a 5-cm-long liquid-hydrogen (LH 2 ) target located in the center of the CB.…”

Section: Methodsmentioning

confidence: 99%

Photoproduction of theωmeson on the proton near threshold

Strakovsky¹,

Prakhov²,

Azimov³

et al. 2015

Phys. Rev. C

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Photoproduction of the ω meson on the proton near threshold An experimental study of ω photoproduction on the proton has been conducted by using the Crystal Ball and TAPS multiphoton spectrometers together with the photon tagging facility at the Mainz Microtron MAMI. The γp → ωp differential cross sections are measured from threshold to the incident-photon energy Eγ = 1.40 GeV (W = 1.87 GeV for the center-of-mass energy) with 15-MeV binning in Eγ and full production-angle coverage. The quality of the present data near threshold gives access to a variety of interesting physics aspects. As an example, an estimation of the ωN scattering length αωp is provided.

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“…The more recent measurements with a polarized d-buthanol target were done with a slightly modified setup, using a smaller TAPS wall combined with a forward plug of the barrel of CsI crystals equipped with photomultipliers [45]. [54,55] can now deliver electron beams with energies up to 1.5 GeV, however for some of the experiments lower beam energies have been used (883 MeV). Like at ELSA photon beams are produced by the bremsstrahlung process and are tagged with the Glasgow magnetic spectrometer [56]; at maximum electron energy with a typical resolution of 4 MeV (2 MeV for 883 MeV electron beam energy).…”

Section: The Crystal Barrel/taps Setup At the Bonn Elsa Acceleratormentioning

confidence: 99%

Photoproduction of Mesons off Nuclei - The Photonuclear Programs at ELSA and MAMI

Krusche

2012

J. Phys.: Conf. Ser.

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Abstract. Recent results for the photoproduction of mesons from nuclei with tagged bremsstrahlung beams are summarized. The experiments have been done at the Mainz MAMI accelerator with the Crystal Ball/TAPS setup and at the Bonn ELSA accelerator with the Crystal Barrel/TAPS detector. Two main physics topics are covered. The electromagnetic excitation spectrum of the neutron has been studied with meson photoproduction reactions off quasi-free neutrons from light nuclei. Particularly interesting results have been obtained for η-photoproduction, where the excitation function of the neutron shows a pronounced, narrow structure which is not observed for the proton. The interaction of mesons with nuclear matter and the in-medium properties of hadrons under various aspects have been studied with meson photoproduction from nuclei, covering a large mass range (from the deuteron to lead). Questions like the possible formation of η-mesic nuclei and in-medium modifications of the σ-meson have been addressed.

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Status Report on the Normal Conducting CW Racetrack Microtron Cascade "MAMI"

Cited by 89 publications

References 4 publications

Measurement of the ω→π0e+e− and η→e+e

Measurement of the ω→π0e+e− and η→e+e

Photoproduction of theωmeson on the proton near threshold

Photoproduction of Mesons off Nuclei - The Photonuclear Programs at ELSA and MAMI

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