23 Result(s)
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Article
Open AccessMeasurement of polarization observables \(\textbf{T}\) , \({\textbf{P}}\) , and \({\textbf{H}}\) in \(\mathbf {\pi ^0}\) and \(\mathbf {\eta }\) photoproduction off quasi-free nucleons
The target asymmetry T, recoil asymmetry P, and beam-target double polarization observable H were determined in exclusive \(\pi ^0\) ...
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Article
Observation of a structure in the \(M_{p\eta }\) invariant mass distribution near 1700 \(\hbox {MeV}/\hbox {c}^2\) in the \(\gamma \mathbf {p \rightarrow p \pi ^0 \eta } \) reaction
The reaction \(\gamma p \rightarrow p \pi ^0 \eta \) γ p ...
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Article
Open AccessMeasurement of the helicity asymmetry E for the reaction \( \gamma p\rightarrow \pi ^0 p\)
A measurement of the double-polarization observable E for the reaction \(\gamma p\rightarrow \pi ^0 p\) ...
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Article
Photoproduction of \(\eta\) mesons from the neutron: Cross sections and double polarization observable E
Results from measurements of the photoproduction of \(\eta\) η ...
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Article
Double-polarization observable G in neutral-pion photoproduction off the proton
This paper reports on a measurement of the double-polarization observable G in \( \pi^0\) ...
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Article
Erratum to: High-statistics study of the reaction \(\gamma p\rightarrow p2\pi^{0}\)
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Article
High-statistics study of the reaction γp → p2π0
The photoproduction of 2π 0 mesons off protons was studied with the Crystal Barrel/TAPS experiment at the electron accelerator ELSA in Bonn. The energy of photons produced in a rad...
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Article
Photoproduction of ω mesons off protons and neutrons
ω photoproduction off hydrogen and deuterium has been studied with the tagged photon beam of the ELSA accelerator in Bonn for photon energies up to 2.0 GeV. The ω meson has been identified via th...
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Article
High statistics study of the reaction γp → pπ0 η
Photoproduction off protons of the pπ 0 η three-body final state was studied with the Crystal Barrel/TAPS detector, at the electron stretcher accelerator ELSA in Bonn, for incident...
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Article
Quasi-free photoproduction of η-mesons off the deuteron
Precise data for quasi-free photoproduction of η-mesons off the deuteron have been measured at the Bonn ELSA accelerator with the combined Crystal Barrel/TAPS detector for incident photon energies up to 2.5GeV. T...
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Article
Measurement of the helicity-dependent total cross-section for the \( \gamma\) n \( \rightarrow\) p \( \pi^{-}_{}\) \( \pi^{0}_{}\) reaction
The helicity dependence of the total cross-section for the \( \gamma\) n \( \rightarrow\) ...
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Article
Open AccessPhotoproduction of \( \omega\) mesons on nuclei near the production threshold
The photoproduction of \( \omega\) mesons on LH2 , C and Nb has been measured for incident photon energies from 900 to ...
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Article
Open AccessPhotoproduction of \( \eta{^\prime}\) -mesons off the deuteron
Quasi-free photoproduction of \( \eta{^\prime}\) -mesons off nucleons bound in the deuteron has been measured with the ...
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Article
Helicity dependence of the \( \gamma\) d \( \rightarrow\) \( \pi\) NN reactions in the \( \Delta\) -resonance region
The helicity dependence of the differential cross-section for the \( \gamma\) d ...
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Article
Photoproduction of η -mesons off nuclei for Eγ ⩽ 2.2 GeV
The photoproduction of η -mesons off 12C , 40Ca , 93Nb , and nat Pb nuclei has been measured with a tagged photon beam with energies between 0.6 and 2.2GeV. The experiment was p...
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Article
Measurement of the beam asymmetry Σ in πeta; production off the proton with the CBELSA/TAPS experiment⋆
In photoproduction experiments, a large number of final states yielding various resonance contributions are accessible. To extract resonance parameters via partial-wave analysis not only the measurement of dif...
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Article
K0πand K*0Σ+ photoproduction off the proton
The exclusive reactions γp → K *0Σ+(1189) and γp → K 0π0Σ+(1189) , leading to the p 4π0 final state, have been measured with a tagged photon beam for incident energ...
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Article
Nucleon resonance decay by the K0Σchannel
Hyperon production off the proton in the K 0Σ+ channel has been studied at the tagged-photon beam facility at the ELSA electron accelerator in Bonn. This experiment was part of a series of neutral...
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Article
First measurement of the helicity dependence for the γp → pπreaction
The helicity dependence of the total cross-section and the invariant-mass distributions in the (pπ±) and (π+π-) final states for the γp → pπ+π- reaction have been measured for the first time at incident photon en...
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Article
Measurement of the beam asymmetry in η photoproduction off the proton
The beam asymmetry, Σ , was measured at ELSA in the reaction \( \boldsymbol\gamma\) p → ηp using linear...
