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Publications (34)

nucl-ex2024

$K^{+} I^ (1520)$ photoproduction at forward angles near threshold with the BGOOD experiment

E. O. Rosanowski, T. C. Jude, S. Alef +22

The differential cross section for $I^^{3} p \to K^{+} I^ (1520)$ was measured from threshold to a centre-of-mass energy of 2090\,MeV at forward angles at the BGOOD experiment. The h…

nucl-ex2015

Measurement of double polarisation asymmetries in $I ¨ $ -photoproduction

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

The first measurements of the beam-target-helicity-asymmetries $E$ and $G$ in the photoproduction of $I ¨ $ -mesons off protons at the CBELSA/TAPS experiment are reported. $E$ ( $G$ ) w…

nucl-ex2015

High statistics study of the reaction $I^^{3} p \to p 2 I ¨ ^{0}$

V. Sokhoyan, E. Gutz, V. Crede +62

The photoproduction of 2 $I ¨ ^{0}$ 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…

nucl-ex2014

First measurement of the helicity asymmetry for $I^^{3} p \to p I ¨ ^{0}$ 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-ex2014

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 $I^^{3} p \to p I ¨ ^{0}$ are reported. The results are extracted from azimuthal asymmetries when a transversely polariz…

nucl-ex2014

Measurement of polarisation observables in $K_{s}^{0} I^£^{+}$ photoproduction off the proton

R. Ewald, A. V. Anisovich, B. Bantes +57

The reaction $I^^{3} p \to K_{S}^{0} I^£^{+}$ is studied in the photon energy range from threshold. Linearly polarised photon beams from coherent bremsstrahlung enabled the first m…

nucl-ex2019

New data on $I^^{3} p \to I^\cdot p$ with polarized photons and protons and their implications for $N^{*} \to N I^\cdot$ decays

J. MÃ¼ller, J. Hartmann, M. GrÃ¼ner +86

The polarization observables $T, E, P, H$ , and $G$ in photoproduction of $I^\cdot$ mesons off protons are measured for photon energies from threshold to $W = 2400$ MeV ( $T$ ), 2280 MeV ($…

nucl-ex2012

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…

nucl-ex2024

Coherent $I ¨ ^{0} I^\cdot d$ photoproduction at forward deuteron angles measured at BGOOD

A. J. Clara Figueiredo, T. C. Jude, S. Alef +18

The coherent reaction, $I^^{3} d \to I ¨ ^{0} I^\cdot d$ was studied with the BGOOD experiment at ELSA from threshold to a centre-of-mass energy of 3200\,MeV. A full kinematic reconstructi…

nucl-ex2015

Photoproduction of Ï Mesons off the Proton

A. Wilson, V. Crede, A. V. Anisovich +62

The differential cross sections and unpolarized spin-density matrix elements for the reaction $I^^{3} p \to p I ¨ $ were measured using the CBELSA/TAPS experiment for initial photon energie…

nucl-ex2011

Anomaly in the K^0_S Sigma^+ photoproduction cross section off the proton at the K* threshold

R. Ewald, A. V. Anisovich, B. Bantes +57

The $I^^{3} + p \to K^{0} + I^£^{+}$ photoproduction reaction is investigated in the energy region from threshold to $E_{I^}^{3} = 2250$ \,MeV. The differential cross section exhibits increa…

nucl-ex2021

Observation of a structure in the M $_{p I^\cdot}$ invariant mass distribution near 1700 MeV/ $c^{2}$ in the $I^^{3} p \to p I ¨ ^{0} I^\cdot$ reaction

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

The reaction $I^^{3} p \to p I ¨ ^{0} I^\cdot$ has been studied with the CBELSA/TAPS detector at the electron stretcher accelerator ELSA in Bonn for incident photon energies from thresho…

nucl-ex2015

Strangeness Photoproduction at the BGO-OD Experiment

T. C. Jude, S. Alef, D. Bayadilov +61

BGO-OD is a newly commissioned experiment to investigate the internal structure of the nucleon, using an energy tagged bremsstrahlung photon beam at the ELSA electron facility. The…

nucl-ex2019

Measurement of the Helicity Asymmetry $E$ for the reaction $I^^{3} p \to I ¨ ^{0} p$

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

A measurement of the double-polarization observable $E$ for the reaction $I^^{3} p \to I ¨ ^{0} p$ is reported. The data were taken with the CBELSA/TAPS experiment at the ELSA facility in Bo…

nucl-ex2018

The Î·'-carbon potential at low meson momenta

M. Nanova, S. Friedrich, V. Metag +58

The production of $I^\cdot^{'}$ mesons in coincidence with forward-going protons has been studied in photon-induced reactions on $^{12}$ C and on a liquid hydrogen (LH $_{2}$ ) target for…

nucl-ex2010

Photoproduction of $I^\cdot^{'}$ -mesons off the deuteron

I. Jaegle, T. Mertens, A. Fix +62

Quasi-free photoproduction of $I^\cdot^{'}$ mesons off nucleons bound in the deuteron has been measured with the combined Crystal Barrel - TAPS detector. The experiment was done at a tagge…

nucl-ex2021

Observation of a cusp-like structure in the $I^^{3} p \to K^{+} I^£^{0}$ cross section at forward angles and low momentum transfer

T. C. Jude, S. Alef, P. Bauer +39

The $I^^{3} p \to K^{+} I^£^{0}$ differential cross section at extremely forward angles was measured at the BGOOD experiment. A three-quarter drop in strength over a narrow range in e…

nucl-ex2016

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 $I ¨ ^{0}$ photoproduction off the proton using the CBELSA/TAPS experiment at the ELSA accelerator in Bon…

nucl-ex2023

Measurement of the $I^^{3} n \to K^{0} I^£^{0}$ differential cross section over the $K^{*}$ threshold

K. Kohl, T. C. Jude, S. Alef +30

The differential cross section for the quasi-free photoproduction reaction $I^^{3} n \to K^{0} I^£^{0}$ was measured at BGOOD at ELSA from threshold to a centre-of-mass energy of 2400…

nucl-ex2016

Momentum dependence of the imaginary part of the $I ¨ $ - and $I^\cdot^{'}$ -nucleus optical potential

S. Friedrich, M. Nanova, V. Metag +57

The photoproduction of $I ¨ $ and $I^\cdot^{'}$ mesons off carbon and niobium nuclei has been measured as a function of the meson momentum for incident photon energies of 1.2-2.9 GeV a…

nucl-ex2014

Experimental constraints on the $I ¨ $ -nucleus real potential

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

In a search for $I ¨ $ mesic states, the production of $I ¨ $ -mesons in coincidence with forward going protons has been studied in photon induced reactions on $^{12}$ C for incident pho…

physics.ins-det2020

The BGOOD experimental setup at ELSA

S. Alef, P. Bauer, D. Bayadilov +58

The BGOOD experiment at the ELSA facility in Bonn has been commissioned within the framework of an international collaboration. The experiment pursues a systematic investigation of…

nucl-ex2013

Determination of the Î·'-nucleus optical potential

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

The excitation function and momentum distribution of $I^\cdot^{'}$ mesons have been measured in photon induced reactions on $^{12}$ C in the energy range of 1250-2600 MeV. The exper…

nucl-ex2021

$K^{+} I^$ photoproduction at forward angles and low momentum transfer

S. Alef, P. Bauer, D. Bayadilov +39

$I^^{3} p \to K^{+} I^$ differential cross sections and recoil polarisation data from threshold for extremely forward angles are presented. The measurements were performed at the…

nucl-ex2011

Quasi-free photoproduction of eta-mesons off the deuteron

I. Jaegle, B. Krusche, A. V. Anisovich +69

Precise data for quasi-free photoproduction of $I^\cdot$ mesons off the deuteron have been measured at the Bonn ELSA accelerator with the combined Crystal Barrel/TAPS detector for incid…

nucl-ex2017

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

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

Photoproduction of $I^\cdot$ mesons from neutrons} \abstract{Results from measurements of the photoproduction of $I^\cdot$ mesons from quasifree protons and neutrons are summarized. The expe…

nucl-ex2025

Polarization observables in double neutral pion photoproduction

TAPS Collaboration, T. Seifen, J. Hartmann +73

Measurements of target asymmetries and double-polarization observables for the reaction $I^^{3} p \to p I ¨ ^{0} I ¨ ^{0}$ are reported. The data were taken with the CBELSA/TAPS experiment at the…

nucl-ex2024

Evidence of a dibaryon spectrum in coherent $I ¨ ^{0} I ¨ ^{0} d$ photoproduction at forward deuteron angles

T. C. Jude, S. Alef, R. Beck +27

The coherent reaction, $I^^{3} d \to I ¨ ^{0} I ¨ ^{0} d$ was studied with the BGOOD experiment at ELSA from threshold to a centre-of-mass energy of 2850\,MeV. A full kinematic reconstru…

nucl-ex2015

The polarization observables T, P, and H and their impact on $I^^{3} p \to p I ¨ ^{0}$ multipoles

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

Data on the polarization observables T, P, and H for the reaction $I^^{3} p \to p I ¨ ^{0}$ are reported. Compared to earlier data from other experiments, our data are more precise and extend…

nucl-ex2011

Photoproduction of Neutral Pions off Protons

TAPS Collaboration, V. Crede, N. Sparks +59

Photoproduction of neutral pions has been studied with the CBELSA/TAPS detector in the reaction $I^^{3} p \to p I ¨ ^{0}$ for photon energies between 0.85 and 2.50 GeV. The $I ¨ ^{0}$ mesons are…

nucl-ex2010

Measurement of the Beam Asymmetry $I^£$ in the Forward Direction for pi0 Photoproduction

N. Sparks, V. Crede, A. V. Anisovich +57

Photoproduction of neutral pions has been studied with the CBELSA/TAPS detector for photon energies between 0.92 and 1.68~GeV at the electron accelerator ELSA. The beam asymmetry~$…

physics.ins-det2023

The new APD-Based Readout of the Crystal Barrel Calorimeter -- An Overview

TAPS Collaboration, C. Honisch, P. Klassen +47

The Crystal Barrel is an electromagnetic calorimeter consisting of 1380 CsI(Tl) scintillators, and is currently installed at the CBELSA/TAPS experiment where it is used to detect d…

nucl-ex2010

Photoproduction of meson pairs: First measurement of the polarization observable I^s

E. Gutz, V. Sokhoyan, H. van Pee +64

The polarization observable I^s, a feature exclusive to the acoplanar kinematics of multi-meson final states produced via linearly polarized photons, has been measured for the firs…

nucl-ex2016

Determination of the real part of the Î·'-Nb optical potential

M. Nanova, S. Friedrich, V. Metag +51

The excitation function and momentum distribution of Î·' mesons have been measured in photoproduction off 93^Nb in the energy range of 1.2-2.9 GeV. The experiment has been performe…

Publications (34)

K+I^(1520) photoproduction at forward angles near threshold with the BGOOD experiment

Measurement of double polarisation asymmetries in I¨-photoproduction

High statistics study of the reaction I^3p→p2I¨0

First measurement of the helicity asymmetry for I^3p→pI¨0 in the resonance region

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

Measurement of polarisation observables in Ks0​I^£+ photoproduction off the proton

New data on I^3p​→I^⋅p with polarized photons and protons and their implications for N∗→NI^⋅ decays

Well-established nucleon resonances revisited by double-polarization measurements

Coherent I¨0I^⋅d photoproduction at forward deuteron angles measured at BGOOD

Photoproduction of Ï Mesons off the Proton

Anomaly in the K^0_S Sigma^+ photoproduction cross section off the proton at the K* threshold

Observation of a structure in the MpI^⋅​ invariant mass distribution near 1700 MeV/c2 in the I^3p→pI¨0I^⋅ reaction

Strangeness Photoproduction at the BGO-OD Experiment

Measurement of the Helicity Asymmetry E for the reaction I^3p→I¨0p

The Î·'-carbon potential at low meson momenta

Photoproduction of I^⋅′-mesons off the deuteron

Observation of a cusp-like structure in the I^3p→K+I^£0 cross section at forward angles and low momentum transfer

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

Measurement of the I^3n→K0I^£0 differential cross section over the K∗ threshold

Momentum dependence of the imaginary part of the I¨- and I^⋅′-nucleus optical potential

Experimental constraints on the I¨-nucleus real potential

The BGOOD experimental setup at ELSA

Determination of the Î·'-nucleus optical potential

K+I^ photoproduction at forward angles and low momentum transfer

Quasi-free photoproduction of eta-mesons off the deuteron

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

Polarization observables in double neutral pion photoproduction

Evidence of a dibaryon spectrum in coherent I¨0I¨0d photoproduction at forward deuteron angles

The polarization observables T, P, and H and their impact on I^3p→pI¨0 multipoles

Photoproduction of Neutral Pions off Protons

Measurement of the Beam Asymmetry I^£ in the Forward Direction for pi0 Photoproduction

The new APD-Based Readout of the Crystal Barrel Calorimeter -- An Overview

Photoproduction of meson pairs: First measurement of the polarization observable I^s

Determination of the real part of the Î·'-Nb optical potential

$K^{+} I^ (1520)$ photoproduction at forward angles near threshold with the BGOOD experiment

Measurement of double polarisation asymmetries in $I ¨ $ -photoproduction

High statistics study of the reaction $I^^{3} p \to p 2 I ¨ ^{0}$

First measurement of the helicity asymmetry for $I^^{3} p \to p I ¨ ^{0}$ in the resonance region

Measurement of polarisation observables in $K_{s}^{0} I^£^{+}$ photoproduction off the proton

New data on $I^^{3} p \to I^\cdot p$ with polarized photons and protons and their implications for $N^{*} \to N I^\cdot$ decays

Coherent $I ¨ ^{0} I^\cdot d$ photoproduction at forward deuteron angles measured at BGOOD

Photoproduction of Ï Mesons off the Proton

Observation of a structure in the M $_{p I^\cdot}$ invariant mass distribution near 1700 MeV/ $c^{2}$ in the $I^^{3} p \to p I ¨ ^{0} I^\cdot$ reaction

Measurement of the Helicity Asymmetry $E$ for the reaction $I^^{3} p \to I ¨ ^{0} p$

Photoproduction of $I^\cdot^{'}$ -mesons off the deuteron

Observation of a cusp-like structure in the $I^^{3} p \to K^{+} I^£^{0}$ cross section at forward angles and low momentum transfer

Measurement of the $I^^{3} n \to K^{0} I^£^{0}$ differential cross section over the $K^{*}$ threshold

Momentum dependence of the imaginary part of the $I ¨ $ - and $I^\cdot^{'}$ -nucleus optical potential

Experimental constraints on the $I ¨ $ -nucleus real potential

$K^{+} I^$ photoproduction at forward angles and low momentum transfer

Evidence of a dibaryon spectrum in coherent $I ¨ ^{0} I ¨ ^{0} d$ photoproduction at forward deuteron angles

The polarization observables T, P, and H and their impact on $I^^{3} p \to p I ¨ ^{0}$ multipoles

Measurement of the Beam Asymmetry $I^£$ in the Forward Direction for pi0 Photoproduction