W. Ullrich
Dresden University of Technology
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Featured researches published by W. Ullrich.
Physics Letters B | 2010
S. Abdel-Samad; M. Abdel-Bary; K. Brinkmann; H. Clement; J. Dietrich; E. Dorochkevitch; S. Dshemuchadse; K. Ehrhardt; A. Erhardt; W. Eyrich; C. Fanara; D. Filges; A. Filippi; H. Freiesleben; M. Fritsch; W. Gast; J. Georgi; A. Gillitzer; J. Gottwald; J. Hauffe; D. Hesselbarth; H. Jaeger; B. Jakob; R. Jaekel; L. Karsch; K. Kilian; H. Koch; M. Krapp; J. Kress; E. Kuhlmann
Abstract Hyperon production in the threshold region was studied in the reaction pp → K + Λ p using the time-of-flight spectrometer COSY-TOF. Exclusive data, covering the full phase-space, were taken at the three different beam momenta of p beam = 2.95 , 3.20 and 3.30 GeV/ c , corresponding to excess energies of e = 204 , 285 and 316 MeV, respectively. Total cross-sections were deduced for the three beam momenta to be 23.9 ± 0.8 ± 2.0 μb , 28.4 ± 1.3 ± 2.2 μb and 35.0 ± 1.3 ± 3.0 μb . Differential observables including Dalitz plots were obtained. The analysis of the Dalitz plots reveals a strong influence of the N ( 1650 ) -resonance at p beam = 2.95 GeV / c , whereas for the higher momenta an increasing relative contribution of the N ( 1710 ) - and/or of the N ( 1720 ) -resonance was observed. In addition, the pΛ -final-state interaction turned out to have a significant influence on the Dalitz plot distribution.
European Physical Journal A | 2010
M. Abdel-Bary; S. Abdel-Samad; K.-Th. Brinkmann; H. Clement; J. Dietrich; E. Doroshkevich; S. Dshemuchadse; K. Ehrhardt; A. Erhardt; W. Eyrich; A. Filippi; H. Freiesleben; M. Fritsch; W. Gast; A. Gillitzer; J. Gottwald; H. Jäger; B. Jakob; René Jäkel; L. Karsch; K. Kilian; H. Koch; M. Krapp; J. Kreß; E. Kuhlmann; A. Lehmann; S. Marcello; S. Mauro; P. Michel; K. Möller
A systematic study of the production of
European Physical Journal A | 2012
M. Abdel-Bary; S. Abdel-Samad; K.-Th. Brinkmann; H. Clement; J. Dietrich; E. Doroshkevich; S. Dshemuchadse; K. Ehrhardt; A. Erhardt; W. Eyrich; A. Filippi; H. Freiesleben; M. Fritsch; W. Gast; J. Georgi; A. Gillitzer; J. Gottwald; D. Hesselbarth; H. Jäger; B. Jakob; René Jäkel; L. Karsch; K. Kilian; H. Koch; M. Krapp; J. Kreß; E. Kuhlmann; A. Lehmann; S. Marcello; S. Marwinski
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European Physical Journal A | 2008
M. Abdel-Bary; K.-Th. Brinkmann; H. Clement; E. Doroshkevich; S. Dshemuchadse; A. Erhardt; W. Eyrich; H. Freiesleben; A. Gillitzer; René Jäkel; L. Karsch; K. Kilian; E. Kuhlmann; K. Möller; H. P. Morsch; L. Naumann; N. Paul; C. Pizzolotto; J. Ritman; E. Roderburg; W. Schroeder; M. Schulte-Wissermann; Th. Sefzick; A. Teufel; A. Ucar; W. Ullrich; P. Wintz; P. Wüstner; P. Zupranski
-mesons in proton-proton collisions was carried out in a kinematically complete experiment at three excess energies (
International Journal of Modern Physics A | 2005
K.-Th. Brinkmann; M. Abdel-Bary; S. Abdel-Samad; H. Clement; E. Doroshkevich; S. Dshemuchadse; H. Dutz; K. Ehrhardt; A. Erhardt; W. Eyrich; A. Filippi; H. Freiesleben; M. Fritsch; J. Georgi; A. Gillitzer; P. Gonser; René Jäkel; L. Karsch; K. Kilian; H. Koch; J. Kreß; E. Kuhlmann; S. Marcello; W. Meyer; P. Michel; H. P. Morsch; K. Möller; H. Mörtel; L. Naumann; L. Pinna
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European Physical Journal A | 2012
M. Abdel-Bary; S. Abdel-Samad; K.-Th. Brinkmann; H. Clement; J. Dietrich; E. Doroshkevich; S. Dshemuchadse; K. Ehrhardt; A. Erhardt; W. Eyrich; A. Filippi; H. Freiesleben; M. Fritsch; W. Gast; J. Georgi; A. Gillitzer; J. Gottwald; D. Hesselbarth; H. Jäger; B. Jakob; René Jäkel; L. Karsch; K. Kilian; H. Koch; M. Krapp; J. Kreß; E. Kuhlmann; A. Lehmann; S. Marcello; S. Marwinski
= 92, 128, 173 MeV). Both protons were detected using the large-acceptance COSY-TOF spectrometer at an external beam line at the Cooler Synchrotron COSY at Forschungszentrum Jülich. The total cross-section, angular distributions of both
International Journal of Modern Physics A | 2007
W. Ullrich; M. Abdel-Bary; K.-Th. Brinkmann; H. Clement; J. Dietrich; E. Doroshkevich; S. Dshemuchadse; K. Ehrhardt; A. Erhardt; W. Eyrich; H. Freiesleben; A. Gillitzer; René Jäkel; L. Karsch; K. Kilian; E. Kuhlmann; S. Marcello; H. P. Morsch; C. Pizzolotto; J. Ritman; E. Roderburg; W. Schroeder; M. Schulte-Wissermann; A. Teufel; A. Ucar; R. Wenzel; P. Wintz; P. Wüstner; P. Zupranski
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European Physical Journal A | 2010
M. Abdel-Bary; S. Abdel-Samad; K. T. Brinkmann; H. Clement; J. Dietrich; E. Doroshkevich; S. Dshemuchadse; K. Ehrhardt; A. Erhardt; W. Eyrich; D. Filges; A. Filippi; H. Freiesleben; M. Fritsch; W. Gast; J. Georgi; A. Gillitzer; J. Gottwald; D. Hesselbarth; H. Jäger; B. Jakob; René Jäkel; L. Karsch; K. Kilian; H. Koch; M. Krapp; J. Kreß; E. Kuhlmann; A. Lehmann; S. Marcello
-mesons and protons were measured and presented in various reference frames such as the overall CMS, helicity and Jackson frame. In addition, the orientation of the
Physics Letters B | 2008
M. Abdel-Bary; K.-Th. Brinkmann; H. Clement; J. Dietrich; E. Doroshkevich; S. Dshemuchadse; K. Ehrhardt; A. Erhardt; W. Eyrich; H. Freiesleben; A. Gillitzer; J. Gottwald; R. Jä; L. Karsch; K. Kilian; E. Kuhlmann; H. P. Morsch; C. Pizzolotto; S. Reimann; J. Ritman; E. Roderburg; W. Schroeder; M. Schulte-Wissermann; T. Sefzick; G. Y. Sun; A. Teufel; W. Ullrich; R. Wenzel; P. Wintz; P. Wüstner
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Archive | 2015
Tilo Gailat; J. Henniger; W. Ullrich; Harald Großmann; Toni Handke
-spin and invariant-mass spectra were determined. We observe
