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B. Kiel

University of Erlangen-Nuremberg

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Featured researches published by B. Kiel.

Physical Review Letters | 2001

First measurement of the Gerasimov-Drell-Hearn integral for Hydrogen from 200 to 800 MeV

J. Ahrens; M. Lang; S. Goertz; T. Speckner; F. Klein; A. W. Thomas; W. Meyer; A. Braghieri; K. Hansen; K. Helbing; F. Zapadtka; G. Reicherz; B. Schoch; A. Wakai; V. Lisin; M. Schumacher; G. Zeitler; J. C. McGeorge; B. Seitz; T. Matsuda; Tadahisa Iwata; D. Ryckbosch; S. Hasegawa; N. Takabayashi; Michael Sauer; C. Bradtke; G. Anton; R. Leukel; F. Sadiq; R. Kondratiev

A direct measurement of the helicity dependence of the total photoabsorption cross section on the proton was carried out at MAMI (Mainz) in the energy range 200<E_gamma<800 MeV. The experiment used a 4

Physical Review Letters | 2002

Helicity amplitudes A1/2 and A3/2 for the D13(1520) resonance obtained from the gamma-->p-->-->ppi(0) Reaction.

J. Ahrens; S. Altieri; Annand; G. Anton; H. J. Arends; K. Aulenbacher; R. Beck; C. Bradtke; A. Braghieri; N. Degrande; N. d'Hose; D. Drechsel; H. Dutz; S. Goertz; P. Grabmayr; K. Hansen; J. Harmsen; von Harrach D; S. Hasegawa; T. Hasegawa; E. Heid; K. Helbing; H. Holvoet; Van Hoorebeke L; N. Horikawa; Tadahisa Iwata; O. Jahn; P. Jennewein; T. Kageya; S. Kamalov

\pi

European Physical Journal A | 2004

Helicity dependence of the gamma p -> N pi channels and multipole analysis in the Delta region

J. Ahrens; S. Altieri; J. R. M. Annand; Gisela Anton; H. J. Arends; K. Aulenbacher; R. Beck; C Bradtke; A Braghieri; N. Degrande; N. d'Hose; D. Drechsel; H. Dutz; S Goertz; P Grabmayr; Kurt Hansen; J. Harmsen; D. von Harrach; S Hasegawa; T. Hasegawa; E. Heid; K. Helbing; H Holvoet; L. Van Hoorebeke; N Horikawa; T Iwata; O. Jahn; P. Jennewein; T. Kageya; B. Kiel

detection system, a circularly polarized tagged photon beam and a frozen spin target. The contributions to the Gerasimov-Drell-Hearn sum rule and to the forward spin polarizability

Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2003

A photon tagging system for the GDH-Experiment at ELSA

J. Naumann; G. Anton; A Bock; P. Grabmayr; K. Helbing; B. Kiel; D. Menze; Thilo Michel; S. Proff; M. Sauer; M. Schumacher; T. Speckner; W. Weihofen; G. Zeitler

\gamma_0

Physical Review Letters | 2001

First measurement of the Gerasimov-Drell-Hearn integral for 1 H from 200 to 800 MeV

J. Ahrens; S. Altieri; G. Anton; K. Aulenbacher; R. Beck; C. Bradtke; A. Braghieri; N. Degrande; H. Dutz; S. Goertz; P. Grabmayr; K. Hansen; J. Harmsen; D. von Harrach; S. Hasegawa; T. Hasegawa; E. Heid; K. Helbing; H. Holvoet; L. Van Hoorebeke; N. Horikawa; Tadahisa Iwata; P. Jennewein; T. Kageya; B. Kiel; F. Klein; R. Kondratiev; K. Kossert; J. Krimmer; M. Lang

determined from the data are 226 \pm 5 (stat)\pm 12(sys) \mu b and -187 \pm 8 (stat)\pm 10(sys)10^{-6} fm^4, respectively, for 200<E_\gamma<800 MeV.

Physics Letters B | 2003

Helicity dependence of the gamma(pol.) p(pol.) --> n pi+ pi0 reaction in the second resonance region

J. Ahrens; M. Lang; S. Goertz; T. Speckner; F. Klein; A. W. Thomas; W. Meyer; A. Braghieri; K. Hansen; K. Helbing; F. Zapadtka; G. Reicherz; B. Schoch; A. Wakai; V. Lisin; B. Seitz; C. Rovelli; J. C. McGeorge; T. Matsuda; Tadahisa Iwata; D. Ryckbosch; S. Hasegawa; N. Takabayashi; Michael Sauer; C. Bradtke; G. Anton; R. Leukel; K. Aulenbacher; J. Naumann; T. Michel

The helicity dependence of the gamma-->p-->-->ppi(0) reaction has been measured for the first time in the photon-energy range from 550 to 790 MeV. The experiment, performed at the Mainz microtron MAMI, used a 4pi-detector system, a circularly polarized, tagged photon beam, and a longitudinally polarized frozen-spin target. These data are predominantly sensitive to the D13(1520) resonance and are used to determine its helicity amplitudes.

Archive | 2003

Helicity dependence of the gamma p to n pi /sup +/ pi /sup 0/ reaction in the second resonance region

J. Ahrens; S. Altieri; J. R. M. Annand; G. Anton; H. J. Arends; K. Aulenbacher; R. Beck; C. Bradtke; A. Braghieri; N. Degrande; N. d'Hose; H. Dutz; S. Goertz; P. Grabmayr; K. Hansen; J. Harmsen; D. von Harrach; S. Hasegawa; T. Hasegawa; E. Heid; K. Helbing; H. Holvoet; L. Van Hoorebeke; N. Horikawa; Tadahisa Iwata; O. Jahn; P. Jennewein; T. Kageya; B. Kiel; F. Klein

Abstract.A high-quality double-polarization data set for the helicity dependence of the total and differential cross-sections for both

Physical Review Letters | 2002

Helicity AmplitudesA1/2andA3/2for theD13(1520)Resonance Obtained from theγ→p→→pπ0Reaction

J. Ahrens; S. Altieri; J. R. M. Annand; G. Anton; H. J. Arends; K. Aulenbacher; R. Beck; C. Bradtke; A. Braghieri; N. Degrande; N. d'Hose; D. Drechsel; H. Dutz; S. Goertz; P. Grabmayr; K. Hansen; J. Harmsen; D. von Harrach; S. Hasegawa; T. Hasegawa; E. Heid; K. Helbing; H. Holvoet; L. Van Hoorebeke; N. Horikawa; Tadahisa Iwata; O. Jahn; P. Jennewein; T. Kageya; S. Kamalov

\gamma p\rightarrow N \pi

Physical Review Letters | 2002

Helicity amplitudes A(1/2) and A(3/2) for the D-13(1520) resonance obtained from the (gamma)over-right-arrow(p)over-right-arrow -> p pi(0) reaction

J. Ahrens; S. Altieri; J. R. M. Annand; G. Anton; H. J. Arends; K. Aulenbacher; R. Beck; C. Bradtke; A. Braghieri; N. Degrande; N. d'Hose; D. Drechsel; H. Dutz; S. Goertz; P. Grabmayr; Kurt Hansen; J. Harmsen; D. von Harrach; S. Hasegawa; T. Hasegawa; E. Heid; K. Helbing; H. Holvoet; L. Van Hoorebeke; N. Horikawa; Tadahisa Iwata; O. Jahn; P. Jennewein; T. Kageya; S. Kamalov

channels in the

Physical Review Letters | 2002

The helicity amplitudes A(1/2) and A(3/2) for the D13(1520) resonance obtained from the gamma p --> p pi0

S. Altieri J. Ahrens; J. R. M. Annand; G. Anton; H. J. Arends; K. Aulenbacher; R. Beck; C. Bradtke; A. Braghieri; N. Degrande; N. D’Hose; D. Drechsel; H. Dutz; S. Goertz; P. Grabmayr; K. Hansen; J. Harmsen; D. von Harrach; S. Hasegawa; T. Hasegawa; E. Heid; K. Helbing; H. Holvoet; L. Van Hoorebeke; N. Horikawa; Tadahisa Iwata; O. Jahn; P. Jennewein; T. Kageya; S. Kamalov; B. Kiel

\Delta

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