K. Einsweiler
CERN
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Featured researches published by K. Einsweiler.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1988
R.E. Ansorge; C. Aurouet; P. Bareyre; P. Bonamy; C.N. Booth; M. Bouchard; Michel Bourdinaud; M. Cordier; J. Crittenden; J. Dupont; J. Dupraz; K. Einsweiler; C. Engster; J.P. Fabre; J.M. Gaillard; J-L. Garavel; K. Hultqvist; C. Jeanney; S.G. Katvars; M. Lefebvre; L. Linssen; B. McCluskey; B. Merkel; J. Meyer; D.J. Munday; P. Nappey; J.M. Pentney; S. Reynaud; J.G. Rushbrooke; J-C. Thevenin
Abstract A large scintillating fibre detector for the UA2 experiment at the CERN p p Collider is under construction. It will be used for tracking and electron identification. The performance of a full scale test module containing 960 fibres of 2.1 m length and 1 mm diameter is described.
Physics Letters B | 1987
R. Ansari; P. Bagnaia; M. Banner; R. Battiston; K. Bernlöhr; C.N. Booth; K. Borer; M. Borghini; G. Carboni; V. Cavasinni; P. Cenci; J.C. Chollet; A.G. Clark; C. Conta; F. Costantini; Pierre Darriulat; B. De Lotto; T. Del Prete; L. Di Lella; J. Dines-Hansen; K. Einsweiler; L. Fayard; Roberto Ferrari; M. Fraternali; D. Froidevaux; J.M. Gaillard; O. Gildemeister; V.G. Goggi; C. Gössling; B. Hahn
Abstract A study has been made of the decays W → ev and Z → e + e − , using the UA2 detector at the CERN pp Collider. The data correspond to an integrated luminosity of 142 nb −1 at a centre-of-mass collision energy √ s =546 GeV, and 768 nb −1 at √ s =630 GeV. Measurements of the standard model parameters from samples of 251 W decay and 39 Z decay candidates are compared with expectations of the standard electroweak model.
Physics Letters B | 1985
J. A. Appel; M. Banner; E. Lançon; S. Loucatos; B. Mansoulie; M. Polverel; A. Roussarie; V. Ruhlmann; J. Teiger; H. Zaccone; P. Bagnaia; M. Borghini; A.G. Clark; P. Darriulat; L. Di Lella; K. Einsweiler; R. Engelmann; O. Gildemeister; C. Goessling; John Renner Hansen; P. Hansen; N. Harnew; T. Himel; P. Jenni; L. Mapelli; K. Meier; C. Onions; A. Rothenberg; M. Swartz; S.N. Tovey
Abstract The production of very large transverse momentum ( p T ) hadron jets has been measured in the UA2 experiment at the CERN p p Collider for s =630 GeV . The inclusive jet production cross sections exhibit a p T -dependent increase with respect to the s =546 GeV data from previous Collider runs. This increase can be described both by QCD calculations and by approximate x T =2 p T /√ s scaling. No significant deviation of the data from QCD predictions is observed at very large p T , placing a lower limit on the characteristic scale Λ c of a hypothetical superstrong contact interaction responsible for the binding of preons in the quark ( Λ c >370 GeV at 95% CL).
Physics Letters B | 1985
J. A. Appel; G. Carboni; E.-E. Kluge; P. Cenci; M. Borghini; R. Mollerud; C. Gössling; P. H. Hansen; V. Vercesi; M. Fraternali; A. Putzer; B. Mansoulie; K. Einsweiler; Antonio Codino; J. Teiger; M. Banner; M. Schlotelburg; S.N. Tovey; K. Borer; R. Engelmann; M. Moniez; G. Sauvage; L. Iconomidou-Fayard; P. Mani; K. Tittel; P. Jenni; P. Bagnaia; V.G. Goggi; M. Valdata-Nappi; N. Harnew
Abstract The production of very large transverse momentum ( p T ) hadron jets has been measured in the UA2 experiment at the CERN p p Collider for s =630 GeV . The inclusive jet production cross sections exhibit a p T -dependent increase with respect to the s =546 GeV data from previous Collider runs. This increase can be described both by QCD calculations and by approximate x T =2 p T /√ s scaling. No significant deviation of the data from QCD predictions is observed at very large p T , placing a lower limit on the characteristic scale Λ c of a hypothetical superstrong contact interaction responsible for the binding of preons in the quark ( Λ c >370 GeV at 95% CL).
Physics Letters B | 1986
J. A. Appel; P. Bagnaia; M. Banner; R. Battiston; K. Bernlöhr; K. Borer; M. Borghini; G. Carboni; V. Cavasinni; P. Cenci; J.C. Chollet; A.G. Clark; C. Conta; Pierre Darriulat; B. De Lotto; T. Del Prete; L. DiLella; J. Dines-Hansen; K. Einsweiler; R. Engelmann; L. Fayard; M. Fraternali; D. Froidevaux; J.-M. Gaillard; O. Gildemeister; V.G. Goggi; C. Gössling; B. Hahn; H. Hänni; John Renner Hansen
Abstract Using the UA2 apparatus, the inclusive cross section has been measured for production of high- p T direct photons in pp collisions at s =546 GeV and s =630 GeV . The results are in good agreement with QCD predictions.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 1989
J. Alitti; R.E. Ansorge; P. Bareyre; G. Blaylock; P. Bonamy; C.N. Booth; J. Crittenden; R.S. DeWolf; J. Dupont; K. Einsweiler; C. Engster; J.M. Gaillard; K. Hultqvist; M. Lefebvre; L. Linssen; J. Meyer; D.J. Munday; J.M. Pentney; J.G. Rushbrooke; A. Stirling; Anthony Weidberg; P.S. Wells; D.R. Wood; S.A. Wotton; T.O. White; H. Zaccone
Abstract A large scintillating fibre detector consisting of ≈ 60 000 scintillating plastic fibres of 1 mm diameter and 2.4 m length has been used successfully as a tracking and preshower detector in the UA2 experiment at CERN. The detector readout, the pattern recognition algorithm and the results from the p p data taking run are described.
Physics Letters B | 1987
R. Ansari; P. Bagnala; M. Banner; R. Battiston; K. Bernlöhr; C.N. Booth; K. Borer; M. Borghini; G. Carboni; V. Cavasinni; P. Cenci; J.C. Chollet; A.G. Clark; C. Conta; F. Costantini; Pierre Darriulat; B. De Lotto; T. Del Prete; L. Di Lella; J. Dines-Hansen; K. Einsweiler; L. Fayard; Roberto Ferrari; M. Fraternali; D. Froidevaux; J.-M. Gaillard; O. Gildemeister; V.G. Goggi; C. Gössling; B. Hahn
Abstract The total UA2 data sample at the CERN pp Collider corresponds to an integrated luminosity of 910 nb −1 . Limits on various hypothetical processes, such as production of excited electrons, additional charged or neutral vector bosons, or supersymmetric particles, are presented from the analysis of this sample.
Physics Letters B | 1986
J. A. Appel; G. Carboni; E.-E. Kluge; P. Cenci; M. Borghini; R. Mollerud; C. Gössling; P. H. Hansen; V. Vercesi; M. Fraternali; M. Schlotelburg; B. Mansoulie; K. Einsweiler; G. Parrour; J. Teiger; M. Banner; S.N. Tovey; K. Borer; R. Engelmann; K. Jakobs; G. Sauvage; L. Iconomidou-Fayard; P. Mani; P. Jenni; P. Bagnaia; V.G. Goggi; M. Valdata-Nappi; N. Harnew; Michael Andrew Parker; Konrad Bernlohr
Abstract Using the UA2 apparatus, the inclusive cross section has been measured for production of high- p T direct photons in pp collisions at s =546 GeV and s =630 GeV . The results are in good agreement with QCD predictions.
European Physical Journal C | 1986
J. A. Appel; P. Bagnaia; M. Banner; R. Battiston; K. Bernlöhr; K. Borer; M. Borghini; G. Carboni; V. Cavasinni; P. Cenci; J.C. Chollet; A.G. Clark; Antonio Codino; C. Conta; P. Darriulat; B. De Lotto; T. Del Prete; L. Di Lella; J. Dines-Hansen; K. Einsweiler; R. Engelmann; L. Fayard; M. Fraternali; D. Froidevaux; J.M. Gaillard; O. Gildemeister; V.G. Goggi; C. Gössling; B. Hahn; H. Hänni
AbstractA study ofW± andZ0 properties has been performed using the UA2 detector at the
European Physical Journal A | 1986
J. A. Appel; P. Bagnaia; M. Banner; R. Battiston; K. Bernlöhr; K. Borer; M. Borghini; J. Bürger; G. Carboni; V. Cavasinni; P. Cenci; J.C. Chollet; A.G. Clark; Antonio Codino; C. Conta; P. Darriulat; B. De Lotto; T. Del Prete; L. Di Lella; J. Dines-Hansen; K. Einsweiler; R. Engelmann; L. Fayard; M. Fraternali; D. Froidevaux; J.M. Gaillard; O. Gildemeister; V.G. Goggi; C. Gössling; B. Hahn
