H. Flemming
University of Bonn
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Featured researches published by H. Flemming.
European Physical Journal A | 2007
D. Elsner; A. V. Anisovich; G. Anton; J. C. S. Bacelar; B. Bantes; O. Bartholomy; D. Bayadilov; R. Beck; Y. A. Beloglazov; R. Bogendörfer; R. Castelijns; V. Crede; H. Dutz; A. Ehmanns; K. Essig; R. Ewald; I. Fabry; H. Flemming; K. Fornet-Ponse; M. Fuchs; Chr. Funke; R. W. Gothe; R. Gregor; A. B. Gridnev; E. Gutz; S. Hoffgen; P. Hoffmeister; I. Horn; J. Hossl; I. Jaegle
The beam asymmetry, Σ, was measured at ELSA in the reaction γ p → η p using linearly polarised tagged photon beams, produced by coherent bremsstrahlung off a diamond. The crystal was oriented to provide polarised photons in the energy range Eγ = 800 to 1400 MeV with the maximum polarisation of Pγ = 49% obtained at 1305 MeV. Both dominant decay modes of the η into two photons and 3π were used to extract the beam asymmetry from the azimuthal modulation of the cross section. The measurements cover the angular range Θcm ≃ 50 – 150 degrees. Large asymmetries up to 80 % are observed, in agreement with a previous measurement. The eta-MAID model and the Bonn–Gatchina partial wave analysis describe the measurements, but the required partial waves differ significantly. PACS. 13.60.-r Photon and charged-lepton interactions with hadrons – 13.60.Le Meson production – 13.88.+e Polarization in interactions and scattering – 14.20.Gk Baryon resonances with S=0
Physical Review Letters | 2005
V. Crede; O. Bartholomy; A. V. Anisovich; G. Anton; R. Bantes; Y. A. Beloglazov; R. Bogendörfer; R. Castelijns; A. Ehmanns; J. Ernst; I. Fabry; H. Flemming; A. Fösel; H. Freiesleben; M. Fuchs; Ch. Funke; R. W. Gothe; A. Gridnev; E. Gutz; S. Hoffgen; I. Horn; J. Hößl; R. Joosten; J. Junkersfeld; H. Kalinowsky; F. Klein; E. Klempt; H. Koch; M. Konrad; B. Kopf
Total and differential cross sections for the reaction p(gamma, eta)p have been measured for photon energies in the range from 750 MeV to 3 GeV. The low-energy data are dominated by the S11 wave which has two poles in the energy region below 2 GeV. Eleven nucleon resonances are observed in their decay into p eta. At medium energies we find evidence for a new resonance N(2070)D15 with (mass, width) = (2068+-22, 295+-40) MeV. At photon energies above 1.5 GeV, a strong peak in forward direction develops, signalling the exchange of vector mesons in the t channel.
European Physical Journal A | 2008
I. Horn; A. V. Anisovich; G. Anton; R. Bantes; O. Bartholomy; R. Beck; Y. A. Beloglazov; R. Bogendörfer; R. Castelijns; V. Crede; A. Ehmanns; J. Ernst; I. Fabry; H. Flemming; A. Fösel; M. Fuchs; Ch. Funke; R. W. Gothe; A. Gridnev; E. Gutz; S. Hoffgen; J. Hößl; J. Junkersfeld; H. Kalinowsky; F. Klein; E. Klempt; H. Koch; M. Konrad; B. Kopf; B. Krusche
The reaction
Physical Review Letters | 2005
V. Crede; O. Bartholomy; A. V. Anisovich; G. Anton; R. Bantes; Y. A. Beloglazov; R. Bogendörfer; R. Castelijns; A. Ehmanns; J. Ernst; I. Fabry; H. Flemming; A. Fösel; H. Freiesleben; M. Fuchs; Ch. Funke; R. W. Gothe; A. Gridnev; E. Gutz; S. Hoffgen; I. Horn; J. Hossl; R. Joosten; J. Junkersfeld; H. Kalinowsky; F. Klein; E. Klempt; H. Koch; M. Konrad; B. Kopf
\gamma p\to p\pi^0\eta
European Physical Journal A | 2007
O. Bartholomy; R. Bogendoerfer; V. Crede; I. Fabry; A. V. Anisovich; G. Anton; R. Bantes; Y. A. Beloglazov; R. Castelijns; A. Ehmanns; J. Ernst; H. Flemming; A. Foesel; M. Fuchs; Ch. Funke; R. W. Gothe; A. Gridnev; E. Gutz; S. Hoeffgen; I. Horn; J. Hoebl; J. Junkersfeld; H. Kalinowsky; F. Klein; E. Klempt; H. Koch; M. Konrad; B. Kopf; B. Krusche; J. Langheinrich
has been studied with the CBELSA detector at the tagged photon beam of the Bonn electron stretcher facility. The reaction shows contributions from
Physical Review Letters | 2008
I. Horn; A. V. Anisovich; Gisela Anton; R. Bantes; O. Bartholomy; R. Beck; Yu. A. Beloglazov; R. Bogendörfer; R. Castelijns; V. Crede; A. Ehmanns; J. Ernst; I. Fabry; H. Flemming; A. Fosel; M. Fuchs; Chr. Funke; R. W. Gothe; A. Gridnev; E. Gutz; S. Hoffgen; J. Hossl; J. Junkersfeld; H. Kalinowsky; F. J. de Klein; E. Klempt; H. Koch; M. Konrad; B. Kopf; B. Krusche
\Delta^+(1232)\eta
European Physical Journal A | 2008
I. Horn; A. V. Anisovich; Gisela Anton; R. Bantes; O. Bartholomy; R. Beck; Yu. A. Beloglazov; R. Bogendörfer; R. Castelijns; V. Crede; A. Ehmanns; J. Ernst; I. Fabry; H. Flemming; A. Fosel; M. Fuchs; Ch. Funke; R. W. Gothe; A. Gridnev; E. Gutz; S. Hoffgen; J. Hossl; J. Junkersfeld; H. Kalinowsky; F. J. de Klein; E. Klempt; Hans Koch; M. Konrad; B. Kopf; B. Krusche
,
European Physical Journal A | 2008
I. Horn; A. V. Anisovich; Gisela Anton; R. Bantes; O. Bartholomy; R. Beck; Yu. A. Beloglazov; R. Bogendörfer; R. Castelijns; V. Crede; A. Ehmanns; J. Ernst; I. Fabry; H. Flemming; A. Fosel; M. Fuchs; Ch. Funke; R. W. Gothe; A. Gridnev; E. Gutz; S. Hoffgen; J. Hossl; J. Junkersfeld; H. Kalinowsky; F. J. de Klein; E. Klempt; Hans Koch; M. Konrad; B. Kopf; B. Krusche
N(1535)^+\pi^0
Archive | 2007
H. vanPee; O. Bartholomy; V. Crede; A. V. Anisovich; Gisela Anton; R. Bantes; R. Bogendörfer; R. Castelijns; A. Ehmanns; James A. Ernst; I. Fabry; H. Flemming; A. Fosel; M. Fuchs; Ch. Funke; R. W. Gothe; A. Gridnev; E. Gutz; S. Hoffgen; I. Horn; J. Junkersfeld; H. Kalinowsky; F. J. de Klein; E. Klempt; Hans Koch; Moira Konrad; B. Kopf; B. Krusche; J. Langheinrich; H. Löhner
and
Physical Review Letters | 2005
V. Crede; O. Bartholomy; A. V. Anisovich; Gisela Anton; R. Bantes; Y. A. Beloglazov; R. Bogendörfer; R. Castelijns; A. Ehmanns; J. Ernst; I. Fabry; H. Flemming; A. Fosel; H. Freiesleben; M. Fuchs; Ch. Funke; R. W. Gothe; A. Gridnev; E. Gutz; S. Hoffgen; I. Horn; J. Hossl; R. Joosten; J. Junkersfeld; H. Kalinowsky; F. J. de Klein; E. Klempt; H. Koch; M. Konrad; B. Kopf
pa_0(980)
