H
H. Fenner
Researcher at University of Hamburg
Publications - 57
Citations - 1150
H. Fenner is an academic researcher from University of Hamburg. The author has contributed to research in topics: Annihilation & Electron–positron annihilation. The author has an hindex of 18, co-authored 57 publications receiving 1119 citations.
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Journal ArticleDOI
A measurement of the π0, η and η′ electromagnetic form factors
H. J. Behrend,L. Criegee,J. H. Field,G. Franke,Hannes Jung,Jean-Arcady Meyer,O. Podobrin,V. Schröder,G. G. Winter,P. J. Bussey,A. J. Campbell,D. Hendry,S. Lumsdon,I. O. Skillicorn,J. Ahme,Volker Blobel,M. Feindt,H. Fenner,J. Harjes,J. H. Köhne,J. H. Peters,H. Spitzer,T. Weihrich,W. D. Apel,J. Engler,G. Flügge,D. C. Fries,J. Fuster,K. Gamerdinger,P. Grosse-Wiesmann,H. Küster,H. Müller,K. H. Ranitzsch,H. Schneider,W. De Boer,G. Buschhorn,G. Grindhammer,B. Gunderson,C. Kiesling,R. Kotthaus,Hubert Kroha,D. Lüers,Horst Oberlack,Peter Schacht,S. Scholz,Werner Wiedenmann,M. Davier,Jean-Francois Grivaz,J. Haissinski,V. Journé,F. Le Diberder,J. J. Veillet,K. Blohm,R. George,M. Goldberg,O. Hamon,F. Kapusta,Luc Poggioli,M. Rivoal,G. D'Agostini,F. Ferrarotto,M. Iacovacci,G. Shooshtari,B. Stella,G. Cozzika,Y. Ducros,Gideon Alexander,A. Beck,Gideon Bella,J. Grunhaus,A. Klatchko,Aharon Levy,C. Milstene +72 more
TL;DR: In this article, the π0-form factor of the η-meson was determined from its decay modes π+π−π0, π +π−γ and the neutral decay mode γγ.
Journal ArticleDOI
An Experimental study of the process gamma gamma ---> pi+ pi-
H. J. Behrend,M. Iacovacci,F. Le Diberder,T. Weihrich,G. G. Winter,P. Grosse-Wiesmann,H. Schneider,J. Haissinski,Jean-Arcady Meyer,M. Davier,J. Fuster,G. Flügge,Volker Blobel,B. Stella,D. C. Fries,C. Milstene,G. Grindhammer,G. D'Agostini,J. Ahme,H. Muller,W. De Boer,H. Spitzer,Werner Wiedenmann,W. D. Apel,Gideon Alexander,F. Ferrarotto,J. Engler,V. Schroeder,S. Scholz,M. Feindt,H. Fenner,Jean-Francois Grivaz,Peter Bussey,J. J. Veillet,Peter Schacht,R. George,S. Lumsdon,G. Franke,F. Kapusta,Horst Oberlack,K.H. Ranitzsch,G. Cozzika,Aharon Levy,R. Kotthaus,Y. Ducros,J. Harjes,Hubert Kroha,A. Beck,A. Klatchko,G. Buschhorn,L. Criegee,K. Gamerdinger,G. Shooshtari,I. O. Skillicorn,J. H. Peters,H. Kuester,O. Podobrin,Gideon Bella,D. Hendry,J. Grunhaus,B. Gunderson,M. Rivoal,J. H. Field,J.H. Koehne,C. Kiesling,Luc Poggioli,O. Hamon,Hannes Jung,V. Journé,Alan Campbell,D. Lüers,M. Goldberg,K. Blohm +72 more
TL;DR: In this paper, the CELLO detector was used to measure cross sections for the processγγ→π−π+ππ−− in the mass range 0.75 −1.9 GeV/c2.
Journal ArticleDOI
Scalar lepton search with the CELLO detector at PETRA
H. J. Behrend,Ch. Chen,H. Fenner,J. H. Field,V. Schröder,H. Sindt,G. D'Agostini,W. D. Apel,S. Banerjee,J. Bodenkamp,D. Chrobaczek,J. Engler,G. Flügge,D. C. Fries,W. Fues,K. Gamerdinger,G. Hopp,H. Küster,H. Müller,H. Randoll,G. Schmidt,H. Schneider,W. De Boer,G. Buschhorn,G. Grindhammer,P. Grosse-Wiesmann,B. Gunderson,C. Kiesling,R. Kotthaus,U. Kruse,H. Lierl,D. Lüers,T. Meyer,Horst Oberlack,Peter Schacht,M. J. Schachter,A. Snyder,G. Carnesecchi,P. Colas,A. Cordier,M. Davier,Daniel Fournier,Jean-Francois Grivaz,J. Haissinski,V. Journé,A. Klarsfeld,F. Laplanche,F. Le Diberder,U. Mallik,J. J. Veillet,R. George,M. Goldberg,B. Grossetete,O. Hamon,F. Kapusta,F. Kovacs,G. London,Luc Poggioli,M. Rivoal,R. Aleksan,J. Bouchez,G. Cozzika,Y. Ducros,A. Gaidot,S. Jadach,Y. Lavagne,J. Pamela,J. P. Pansart,F. Pierre +68 more
TL;DR: In this paper, the search for supersymmetric scalar leptons was conducted with the CELLO detector, at the PETRA e + e − storage ring, at a 95% c.l.
Journal ArticleDOI
Measurement of the reaction γγ→π+π+π−π− at PETRA
H. J. Behrend,H. Fenner,M. J. Schachter,V. Schröder,H. Sindt,O. Achterberg,G. D'Agostini,W. D. Apel,J. Engler,G. Flügge,B. Forstbauer,D. C. Fries,W. Fues,K. Gamerdinger,Th. Henkes,G. Hopp,M. Krüger,H. Küster,H. Müller,H. Randoll,G. Schmidt,H. Schneider,W. De Boer,G. Buschhorn,G. Grindhammer,P. Grosse-Wiesmann,B. Gunderson,C. Kiesling,R. Kotthaus,U. Kruse,H. Lierl,D. Lüers,Horst Oberlack,Peter Schacht,G. Bonneaud,P. Colas,A. Cordier,M. Davier,Daniel Fournier,Jean-Francois Grivaz,J. Haissinski,V. Journé,F. Laplanche,F. Le Diberder,U. Mallik,Eduardo Ros,J. J. Veillet,J. H. Field,R. George,M. Goldberg,B. Grossetete,O. Hamon,F. Kapusta,F. Kovacs,G. London,R. Pain,Luc Poggioli,M. Rivoal,R. Aleksan,J. Bouchez,G. Carnesecchi,G. Cozzika,Y. Ducros,A. Gaidot,Patrick Jarry,Y. Lavagne,J. Pamela,J. P. Pansart,F. Pierre +68 more
TL;DR: In this article, the authors determined the cross section for γγ→π+π +π−π −π−− in a way free of assumptions about the relative contributions from σπ, σ02π and 4π (uncorrelated phase space).
Journal ArticleDOI
Search for new heavy quarks in $e^+e^-$ collisions up to 46.78 GeV cm energy
H. J. Behrend,J. Büger,L. Criegee,H. Fenner,G. Franke,Jean-Arcady Meyer,V. Schröder,H. Sindt,U. Timm,G. G. Winter,W. Zimmermann,P. J. Bussey,Alan Campbell,J. B. Dainton,D. Hendry,J. M. Scarr,I. O. Skillicorn,Kevin M. Smith,M. Poppe,H. Spitzer,O. Achterberg,G. D'Agostini,W. D. Apel,J. Engler,G. Flügge,B. Forstbauer,D. C. Fries,W. Fues,K. Gamerdinger,Th. Henkes,G. Hopp,J. Knapp,M. Krüger,H. Küster,H. Müller,H. Randoll,K. H. Ranitzsch,G. Schmidt,H. Schneider,W. De Boer,G. Buschhorn,G. Grindhammer,P. Grosse-Wiesmann,B. Gunderson,C. Kiesling,R. Rotthaus,H. Lierl,D. Lüers,Horst Oberlack,Peter Schacht,G. Bonneaud,P. Colas,A. Cordier,M. Davier,Daniel Fournier,Jean-Francois Grivaz,J. Haissinski,V. Journé,F. Le Diberder,U. Mallik,Eduardo Ros,J. J. Veillet,J. H. Field,R. George,M. Goldberg,O. Hamon,F. Kapusta,F. Kovacs,R. Pain,Luc Poggioli,M. Rivoal,M. Gaspero,B. Stella,R. Aleksan,J. Bouchez,G. Carnesecchi,G. Cozzika,Y. Ducros,A. Gaidot,Patrick Jarry,Y. Lavagne,F. Ould Saada,J. Pamela,J. P. Pansart,F. Pierre,Gideon Alexander,Gideon Bella,Y. Gnat,J. Grunhaus +88 more
TL;DR: The average of the ratio R=σ(e+e−→hadrons)/ σ is 3.85±0.12 and 4.04± 0.10 for the two energy ranges.