M. Krapp
University of Erlangen-Nuremberg
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Featured researches published by M. Krapp.
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.
Physics Letters B | 2007
M. Abdel-Bary; S. Abdel-Samad; K.-Th. Brinkmann; R. Castelijns; H. Clement; J. Dietrich; S. Dshemuchadse; E. Dorochkevitch; W. Eyrich; K. Ehrhardt; A. Erhardt; H. Freiesleben; W. Gast; J. Georgi; A. Gillitzer; H. Jäger; René Jäkel; L. Karsch; K. Kilian; M. Krapp; E. Kuhlmann; A. Lehmann; H. P. Morsch; N. Paul; L. Pinna; C. Pizzolotto; J. Ritman; E. Roderburg; S. Schadmand; P. Schönmeier
Abstract The p p → p K 0 Σ + reaction was investigated with the TOF spectrometer at COSY at 3.059 GeV / c incident beam momentum. The main objective was to clarify whether or not a narrow exotic S = + 1 resonance, the Θ + pentaquark, is populated at 1.53 GeV / c 2 in the p K 0 subsystem with a data sample of much higher statistical significance compared to the previously reported data in this channel. An analysis of these data does not confirm the existence of the Θ + pentaquark. This is expressed as an upper limit for the cross section σ ( p p → Σ + Θ + ) 0.15 μb at the 95% confidence level.
European Physical Journal A | 2013
M. Röder; H. Clement; E. Doroshkevich; R. Dzhygadlo; K. Ehrhardt; A. Erhardt; W. Eyrich; W. Gast; A. Gillitzer; D. Grzonka; J. Haidenbauer; C. Hanhart; F. Hauenstein; P. Klaja; L. Kober; K. Kilian; M. Krapp; M. Mertens; J. Ritman; E. Roderburg; W. Schroeder; T. Sefzick; A. Sibirtsev; P. Wintz; P. Wüstner
The possibility to determine the pΛ scattering length from the final-state interaction in the reaction
European Physical Journal A | 2013
S. Abd El-Samad; K.-Th. Brinkmann; H. Clement; E. Doroshkevich; R. Dzhygadlo; K. Ehrhardt; A. Erhardt; W. Eyrich; H. Freiesleben; W. Gast; A. Gillitzer; D. Grzonka; C. Hanhart; F. Hauenstein; P. Klaja; K. Kilian; M. Krapp; J. Ritman; E. Roderburg; M. Röder; M. Schulte-Wissermann; W. Schroeder; T. Sefzick; G.J. Wagner; P. Wintz; P. Wüstner
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
bar pp to pK^ + Lambda
European Physical Journal C | 2012
S. Abd El-Samad; H. Clement; K. Kilian; A. Gillitzer; G.J. Wagner; K.-Th. Brinkmann; D. Grzonka; H. Freiesleben; E. Doroshkevich; J. Ritman; M. Krapp; C. Hanhart; M. Schulte-Wissermann; P. Wüstner; T. Sefzick; W. Gast; W. Eyrich; A. Erhardt; E. Roderburg; M. Röder; W. Schroeder; P. Wintz; F. Hauenstein; P. Klaja; R. Dzhygadlo; K. Ehrhardt
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
is investigated experimentally. From a transversely polarized measurement, the K+ analyzing power (AN) which, in principle, allows one to extract the spin triplet scattering length is studied. An unexpected energy dependence of the forward/backward symmetric part of AN is found. The influence of N* resonances on the pΛ invariant mass spectrum is investigated by exploiting the large acceptance for the process
Archive | 2012
P. Adlarson; W. Augustyniak; W. Bardan; M. Bashkanov; T. Bednarski; H. Bhatt; M. Büscher; H. Calen; H. Clement; D. Coderre; K. Demmich; E. Doroshkevich; R. Engels; W. Erven; W. Eyrich; P. Fedorets; K. Fransson; F. Goldenbaum; P. Goslawski; A. Goswami; F. Hauenstein; L. Heijkenskjöld; V. Hejny; F. Hinterberger; B. Höistad; A. Jany; L. Jarczyk; T. Johansson; B. Kamys; G. Kemmerling
European Physical Journal A | 2010
M. Abdel-Bary; S. Abdel-Samad; K.-Th. Brinkmann; H. Clement; J. Dietrich; E. Doroshkevich; S. V. Dshemuchadse; K. Ehrhardt; A. Erhardt; W. Eyrich; A. Filippi; H. Freiesleben; Michael Fritsch; W. Gast; A. Gillitzer; J. Gottwald; H. Jager; B. Jakob; René Jäkel; L. Karsch; K. Kilian; Hans Koch; M. Krapp; J. Kress; E. Kuhlmann; A. Lehmann; S. Marcello; S. Mauro; P. Michel; K. Möller
bar pp to pK^ + Lambda to pK^ + ppi ^ -
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; D. Filges; A. Filippi; H. Freiesleben; Michael Fritsch; W. Gast; J. Georgi; A. Gillitzer; J. Gottwald; D. Hesselbarth; H. Jäger; B. Jakob; René Jäkel; L. Karsch; K. Kilian; Hans Koch; M. Krapp; J. Kress; E. Kuhlmann; A. Lehmann; S. Marcello
