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Open AccessMeasurement of the helicity asymmetry \({\mathbb {E}}\) for the \(\vec {\gamma }\vec {p} \rightarrow p \pi ^0\) reaction in the resonance region
The double-spin-polarization observable \({\mathbb {E}}\) E for ...
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Article
Measurement of the helicity dependence for single \(\pi ^{0}\) photoproduction from the deuteron
The helicity-dependent single \(\pi ^{0}\) π 0 ...
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Open AccessSingle \(\pi ^0\) production off neutrons bound in deuteron with linearly polarized photons
The quasifree \(\overrightarrow{\gamma } d\rightarrow \pi ^0n(p)\) ...
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Open AccessExperimental study of the \( \gamma p \rightarrow K^{0}\Sigma^{+}\), \( \gamma n \rightarrow K^{0} \Lambda\), and \( \gamma n \rightarrow K^{0} \Sigma^{0}\) reactions at the Mainz Microtron
This work measured \( \mathrm{d}\sigma/\mathrm{d}\Omega\)dσ/dΩ for neutral kaon photoproduction reactions from threshold up to a c.m. energy of 1855MeV, focussing specifically on the $ \gamma p\rightarrow K^0\Sigma...
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Article
Determination of the scalar polarizabilities of the proton using beam asymmetry \(\Sigma_{3}\) in Compton scattering
The scalar dipole polarizabilities, \(\alpha_{E1}\) ...
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Open AccessPhoton asymmetry measurements of \(\overrightarrow{\gamma}p \rightarrow \pi^{0} p\) for \(E_{\gamma}=\) 320-650 MeV
High-statistics measurements of the photon asymmetry \(\Sigma\) Σ ...
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Article
Photoproduction of \(\eta\) \(\pi\) pairs off nucleons and deuterons
Quasi-free photoproduction of \(\pi\eta\) -pairs has been investigated from threshold up to incident photon energies of ...
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Article
Open AccessPhotoproduction of \( \pi^{0}\) -pairs off protons and off neutrons
Total cross sections, angular distributions, and invariant-mass distributions have been measured for the photoproduction of $ \pi^{0}\...
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Article
Helicity dependence of the γ 3He → πX reactions in the Δ(1232) resonance region
The helicity dependences of the differential cross sections for the semi-inclusive γ 3He → π0 X and γ 3He → π± X reactions have been measured for th...
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Determination of the \( \eta\) mass with the Crystal Ball at MAMI-B
A new precise determination of the \( \eta\) meson mass is presented. It is based on a measurement of the threshold for...
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Article
Open AccessMeasurement of the beam-helicity asymmetry I⊙ in the photoproduction of \( \pi^{0}\) \( \pi^{\pm}\) pairs off protons and off neutrons
Beam-helicity asymmetries have been measured at the MAMI accelerator in Mainz for the photoproduction of mixed-charge pion pairs in the reactions ...
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Open AccessQuasi-free photoproduction of η-mesons off 3He nuclei
Quasi-free photoproduction of η-mesons has been measured off nucleons bound in 3He nuclei for incident photon energies from the threshold region up to 1.4 GeV. The experiment was performed at the tagged photon fa...
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In-medium modifications of the ω meson near the production threshold
The in-medium properties of the ω meson were investigated at the MAMI-C electron accelerator using the Crystal Ball/TAPS detector system to identify ω mesons through their ω → π 0 ...
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Open AccessMeasurements of 12C \((\vec{\gamma},pp)\) photon asymmetries for \(E_{\gamma}=200\) –450 MeV
The 12C \((\vec{\gamma},pp)\) reaction has been studied in the photon energy range 200-450 MeV at the Mainz microtron MA...
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Coherent photoproduction of π0- and η-mesons off 7Li
Coherent photoproduction of π0-mesons from threshold (E th ≈ 136 MeV) throughout the Δ-resonance region and of η-mesons close to the production threshold (E ...
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Open AccessDeep exclusive π+ electroproduction off the proton at CLAS
The exclusive electroproduction of π + above the resonance region was studied using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Laboratory by scattering a 6GeV continuous e...
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Photoproduction of π0π0 - and π0π+ -pairs off the proton from threshold to the second resonance region
Precise total cross-sections and invariant-mass distributions have been measured for photoproduction of pion pairs off the proton producing ...
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Article
Radiative π0 photoproduction on protons in the Δ+ (1232) region
The reaction γp → pπ 0γ′ has been measured with the Crystal Ball/TAPS detectors using the energy-tagged photon beam at the electron accelerator facility MAMI-B. Energy and angular differen...
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Article
Knockout of proton-neutron pairs from 16O with electromagnetic probes
After recent improvements to the Pavia model of two-nucleon knockout from 16O with electromagnetic probes the calculated cross-sections are compared to experimental data from such reactions. Comparison with data ...
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Article
Photoproduction of \( \pi^{0}_{}\) \( \eta\) on protons and the \( \Delta\) (1700)D33 -resonance
Total and differential cross-sections for the reaction \(\ensuremath \gamma p\rightarrow\pi^0\eta p\) have been measure...