activity
20092021
most citedHard Two-Photon Contribution to Elastic Lepton-Proton Scattering: Determined by the OLYMPUS Experiment

100 citations · 595 across the 19 of their papers we have counts for

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15 papers · 1 filter

nucl-ex2021★ 11 cited

Observation of a structure in the M invariant mass distribution near 1700 MeV/ in the reaction

V. Metag, M. Nanova, J. Hartmann +74

The reaction has been studied with the CBELSA/TAPS detector at the electron stretcher accelerator ELSA in Bonn for incident photon energies from threshold…

nucl-ex2020★ 20 cited

Observation of the Cusp in the New Precise Beam Asymmetry Data for

TAPS Collaboration

Data on the beam asymmetry in the photoproduction of mesons off protons are reported for tagged photon energies from 1130 to 1790 MeV (mass range from 1748 MeV to …

nucl-ex2020★ 9 cited

Measurement of the Charge-Averaged Elastic Lepton-Proton Scattering Cross Section by the OLYMPUS Experiment

J. C. Bernauer, A. Schmidt, B. S. Henderson +67

We report the first measurement of the average of the electron-proton and positron-proton elastic scattering cross sections. This lepton charge-averaged cross section is insensitiv…

nucl-ex2019★ 26 cited

New data on with polarized photons and protons and their implications for decays

J. Müller, J. Hartmann, M. Grüner +86

The polarization observables , and in photoproduction of mesons off protons are measured for photon energies from threshold to MeV (), 2280 MeV ($E…

nucl-ex2019★ 2 cited

Measurement of the Helicity Asymmetry for the reaction

TAPS collaboration, M. Gottschall, F. Afzal +66

A measurement of the double-polarization observable for the reaction is reported. The data were taken with the CBELSA/TAPS experiment at the ELSA facility in Bonn…

nucl-ex2017★ 16 cited

Photoproduction of eta mesons from the neutron: cross sections and double polarization observable E

L. Witthauer, M. Dieterle, F. Afzal +70

Photoproduction of mesons from neutrons} \abstract{Results from measurements of the photoproduction of mesons from quasifree protons and neutrons are summarized. The experi…

nucl-ex2016★ 100 cited

Hard Two-Photon Contribution to Elastic Lepton-Proton Scattering: Determined by the OLYMPUS Experiment

B. S. Henderson, L. D. Ice, D. Khaneft +67

The OLYMPUS collaboration reports on a precision measurement of the positron-proton to electron-proton elastic cross section ratio, , a direct measure of the contribution o…

nucl-ex2016★ 20 cited

Double-polarization observable G in neutral-pion photoproduction off the proton

A. Thiel, H. Eberhardt, M. Lang +69

This paper reports on a measurement of the double-polarization observable G in photoproduction off the proton using the CBELSA/TAPS experiment at the ELSA accelerator in Bonn…

nucl-ex2015★ 30 cited

The polarization observables T, P, and H and their impact on multipoles

J. Hartmann, H. Dutz, A. V. Anisovich +76

Data on the polarization observables T, P, and H for the reaction are reported. Compared to earlier data from other experiments, our data are more precise and extend t…

nucl-ex2015★ 14 cited

Measurement of double polarisation asymmetries in -photoproduction

H. Eberhardt, T. C. Jude, H. Schmieden +72

The first measurements of the beam-target-helicity-asymmetries and in the photoproduction of -mesons off protons at the CBELSA/TAPS experiment are reported. () wa…

nucl-ex2014★ 31 cited

The N(1520) 3/2- helicity amplitudes from an energy-independent multipole analysis based on new polarization data on photoproduction of neutral pions

J. Hartmann, H. Dutz, A. V. Anisovich +74

New data on the polarization observables T, P, and H for the reaction are reported. The results are extracted from azimuthal asymmetries when a transversely polarized…

nucl-ex2014★ 21 cited

Experimental constraints on the -nucleus real potential

S. Friedrich, K. Makonyi, V. Metag +61

In a search for mesic states, the production of -mesons in coincidence with forward going protons has been studied in photon induced reactions on C for incident photo…

nucl-ex2013★ 54 cited

First measurement of the helicity asymmetry for in the resonance region

M. Gottschall, A. V. Anisovich, B. Bantes +64

The first measurement of the helicity dependence of the photoproduction cross section of single neutral pions off protons is reported for photon energies from 600 to 2300\,MeV, cov…

nucl-ex2013★ 76 cited

Determination of the η'-nucleus optical potential

M. Nanova, V. Metag, E. Ya. Paryev +59

The excitation function and momentum distribution of mesons have been measured in photon induced reactions on C in the energy range of 1250-2600 MeV. The experi…

nucl-ex2012★ 68 cited

Well-established nucleon resonances revisited by double-polarization measurements

A. Thiel, A. V. Anisovich, D. Bayadilov +64

The first measurement is reported of the double-polarization observable G in photoproduction of neutral pions off protons, covering the photon energy range from 620 to 1120 MeV and…