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Showing papers by "Ulrich Landgraf published in 1991"

Journal Article•DOI•
Gottfried sum from the ratio F2n/F2p.

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P. Amaudruz, Michele Arneodo, A. Arvidson, B. Badelek, Günter Baum, J. Beaufays, I. G. Bird, M. Botje, C. Broggini, W. Brückner, A. Brüll, W. J. Burger, J. Ciborowski, Crittenden R, van Dantzig R, H. Döbbeling, J. Domingo, J. Drinkard, A. R. Dzierba, H. Engelien, M.I. Ferrero, Fluri Ml, P. Grafström, von Harrach D, van der Heijden M, C. A. Heusch, Q. Ingram, A. Jacholkowska, K. Janson, de Jong M, E. M. Kabuss, R. Kaiser, Tjeerd Ketel, Frank Klein, B. Korzen, U. Krüner, S. Kullander, Ulrich Landgraf, F. Lettenström, T. Lindqvist, Gerhard K. Mallot, Chiara Mariotti, van Middelkoop G, Y. Mizuno, J. Nassalski, D. Nowotny, N. Pavel, H. Peschel, Cristiana Peroni, Bogdan Povh, R. Rieger, Klaus Rith, K. Röhrich, E. Rondio, L. Ropelewski, A. Sandacz, C. Scholz, R. A. Schumacher, Urs Sennhauser, F. Sever, T.-A. Shibata, M. Siebler, A. Simon, Amedeo Staiano 
27 May 1991-Physical Review Letters
TL;DR: Experimental results obtained at the CERN Super Proton Synchrotron on the structure function ratio F2n/F2p in the kinematic range 0.004 < x < 0.8 and 0.4 < Q2 < 190 GeV2, together with...
Abstract: Experimental results obtained at the CERN Super Proton Synchrotron on the structure-function ratio F2n/F2p in the kinematic range 0.004 < x < 0.8 and 0.4 < Q2 < 190 GeV2, together with ...

382 citations

Journal Article•DOI•
Comparison of forward hadrons produced in muon interactions on nuclear targets and deuterium

[...]

J. G. Ashman1, B. Badelek2, Günter Baum3, J. Beaufays4, Christopher Bee5, C. Benchouk, I. G. Bird6, S.C. Brown5, M. C. Caputo3, Harry Cheung7, J. S. Chima, Jacek Ciborowski2, R. W. Clifft, G. Coignet8, F. Combley1, G.R. Court5, G. D'Agostini, J. Drees, M. Düren6, N. Dyce9, A. W. Edwards, M. Edward, T. Ernst10, M. I. Ferrero11, David Francis5, E. Gabathuler5, R. Gamet5, V. Gibson7, J. Gillies7, P. Grafström12, Klaus Hamacher, D. von Harrach6, P.J. Hayman5, J.R. Holt5, V. W. Hughes3, A. Jacholkowska4, Tim Jones5, E. M. Kabuss6, B. Korzen, U. Krüner, S. Kullander12, Ulrich Landgraf10, D. Lanske13, F. Lettenström12, T. Lindqvist12, J. G. Loken7, M. Matthews5, Y. Mizuno6, Klaus Mönig, F. Montanet, E. Nagy8, J. Nassalski2, T. O. Niinikoski4, P. R. Norton, F. G. Oakham, R. F. Oppenheim3, A.M. Osborne4, V. Papavassiliou3, N. Pavel, C. Peroni11, H. Peschel, Ricardo Piegaia3, B. Pietrzyk, Uwe Pietrzyk, Bogdan Povh6, P. B. Renton7, J. M. Rieubland4, K. Rith6, E. Rondio2, L. Ropelewski2, D. Salmon1, A. Sandacz2, T. Schröder10, K. P. Schüler3, K. Schultze13, T. A. Shibata6, T. J. Sloan9, Amedeo Staiano11, H. E. Stier10, J. Stock10, Geoffrey Taylor7, Joshua Thompson, T. Walcher, Jozsef Toth8, L. Urban13, W. Wallucks10, S. Wheeler1, W.S.C. Williams7, Stephen Wimpenny5, Roland Windmolders14, J. Womersley7, Karl Ziemons13 •
University of Sheffield1, University of Warsaw2, Yale University3, CERN4, University of Liverpool5, Max Planck Society6, University of Oxford7, Laboratoire d'Annecy-le-Vieux de physique des particules8, Lancaster University9, University of Freiburg10, University of Turin11, Uppsala University12, RWTH Aachen University13, University of Mons14
01 Mar 1991-European Physical Journal C
TL;DR: In this paper, the multiplicities of forward produced hadrons in deep inelastic muon scattering on nuclear targets have been compared with those from deuterium, and the ratios are observed to increase towards unity as the virtual photon energy increases with no significant dependence on the other muon kinematic variables.
Abstract: Differential multiplicities of forward produced hadrons in deep inelastic muon scattering on nuclear targets have been compared with those from deuterium. The ratios are observed to increase towards unity as the virtual photon energy increases with no significant dependence on the other muon kinematic variables. The hadron transverse momentum distribution is observed to be broadened in nuclear targets. The dependence on the remaining hadron variables is investigated and the results are discussed in the framework of intranuclear interaction models and in the context of the EMC effect.

85 citations

Journal Article•DOI•
Precision measurement of the structure function ratios F2(He)/F2(D), F2(C)/F2(D) and F2(Ca)/F2(D)

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P. Amaudruz1, Michele Arneodo, A. Arvidson2, B. Badelek3, G. Baum4, J. Beaufays, I. G. Bird, M. Botje1, C. Broggini, W. Brückner, A. Brüll5, W. J. Burger1, Jacek Ciborowski3, R. van Dantzig, H. Döbbeling, J. Domingo1, J. Drinkard6, H. Engelien5, M.I. Ferrero, L. Fluri, P. Grafström2, D. von Harrach, M. van der Heijden, C. A. Heusch6, Quentin Ingram1, K. Janson2, M. de Jong, E.M. Kabuß, R. Kaiser5, Tjeerd Ketel, F. Klein7, B. Korzen, U. Krüner, S. Kullander2, Ulrich Landgraf5, F. Lettenström6, T. Lindqvist2, G. K. Mallot7, Chiara Mariotti, G. van Middelkoop8, Y. Mizuno, J. Nassalski, D. Nowotny, N. Pavel, Cristiana Peroni, H. Peschel, Bogdan Povh, R. Rieger7, Klaus Rith, K. Röhrich7, E. Rondio3, L. Ropelewski3, A. Sandacz, C. Scholz, R. A. Schumacher1, U. Sennhauser1, F. Sever4, T.-A. Shibata9, M. Siebler4, A. Simon, Amedeo Staiano, Geoffrey Taylor10, M. Treichel, J. L. Vuilleumier, T. Walcher7, Roland Windmolders, F. Zetsche •
Paul Scherrer Institute1, Uppsala University2, University of Warsaw3, Bielefeld University4, University of Freiburg5, University of California, Santa Cruz6, University of Mainz7, CERN8, Heidelberg University9, University of Oxford10
15 Mar 1991-European Physical Journal C
TL;DR: In this article, the structure function ratios F2He/F2D, F2C/F 2D and F2Ca/ F 2D were measured in deep inelastic muon-nucleus scattering at an incident muon momentum of 200 GeV.
Abstract: We present the structure function ratiosF2He/F2D,F2C/F2D andF2Ca/F2D measured in deep inelastic muon-nucleus scattering at an incident muon momentum of 200 GeV. The kinematic range 0.0035

70 citations

Journal Article•DOI•
Forward produced hadrons in mu p and mu d scattering and investigation of the charge structure of the nucleon

[...]

J. G. Ashman1, B. Badelek2, Günter Baum3, J. Beaufays4, Christopher Bee5, C. Benchouk, I. G. Bird6, S.C. Brown5, M. C. Caputo3, Harry Cheung7, J. S. Chima, Jacek Ciborowski2, R. W. Clifft, G. Coignet8, F. Combley1, G.R. Court5, G. D'Agostini, J. Drees, M. Düren6, N. Dycew9, A. W. Edwards, M. Edwards, T. Ernst10, J. Favier8, M. I. Ferrero11, David Francis5, E. Gabathuler5, R. Gamet5, V. Gibson7, J. Gillies7, P. Grafström12, Klaus Hamacher, D. von Harrach6, P.J. Hayman5, J.R. Holt5, V. W. Hughes3, A. Jacholkowska4, Tim Jones5, E. M. Kabuss6, B. Korzen, U. Krüner, S. Kullander12, Ulrich Landgraf10, D. Lanske13, D. Lauterjung, F. Lettenström12, T. Lindqvist12, J. G. Loken7, M. Matthews5, Y. Mizuno6, Klaus Mönig, F. Montanet, E. Nagy8, J. Nassalski2, T. O. Niinikoski4, P. R. Norton, F. G. Oakham, R. F. Oppenheim3, A.M. Osborne4, V. Papavassiliou3, N. Pavel, C. Peroni11, H. Peschel, Ricardo Piegaia3, B. Pietrzyt, Uwe Pietrzyk, Bogdan Povh6, P. B. Renton7, J. M. Rieubland4, K. Rith6, E. Rondio2, L. Ropelewski2, D. Salmon1, A. Sandacz2, A. Schlagböhmer10, Adam C. Schneider, T. Schröder10, K. P. Schüler3, K. Schultze13, T. A. Shibata6, T. J. Sloan9, Amedeo Staiano11, H. E. Stier10, J. Stock10, Geoffrey Taylor7, Joshua Thompson, T. Walcher6, Jozsef Toth8, L. Urban13, H. Wahlen, W. Wallucks10, M. Whalley1, S. Wheeler1, W.S.C. Williams7, Stephen Wimpenny5, Roland Windmolders14, J. Womersley7, Karl Ziemons13 •
University of Sheffield1, University of Warsaw2, Yale University3, CERN4, University of Liverpool5, Max Planck Society6, University of Oxford7, Laboratoire d'Annecy-le-Vieux de physique des particules8, Lancaster University9, University of Freiburg10, University of Turin11, Uppsala University12, RWTH Aachen University13, University of Mons14
01 Sep 1991-European Physical Journal C
TL;DR: In this paper, the authors used the EMC forward spectrometer to measure the production of forward charged hadrons in μp and μd scattering at incident beam energies between 100 and 280 GeV.
Abstract: Final data measured with the EMC forward spectrometer are presented on the production of forward charged hadrons in μp and μd scattering at incident beam energies between 100 and 280 GeV. The large statistic of 373 000 events allows a study of the semi-inclusive hadron production as a function ofz,pT2 and 〈pT2〉 in smallQ2,xBj andW bins. Charge multiplicity ratios and differences as a function ofz andxBj are given forp, d andn-targets. From the differences of charge multiplicities the ratio of the valence quark distributions of the protondv(x)/uv(x) is determined for the first time in charged lepton scattering. The Gronau et al. sum rule is tested, the measured sum being 0.31±0.06 stat. ±0.05 syst., compared with the theoretical expectation of 2/7≈0.286. The measured sum corresponds to an absolute value of the ratio of thed andu quark charge of 0.44±0.10 stat.±0.08 syst.

47 citations

Journal Article•DOI•
Nuclear effects in deep inelastic scattering

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Ulrich Landgraf1, Ulrich Landgraf2•
University of Freiburg1, CERN2
20 May 1991-Nuclear Physics
TL;DR: In this article, it was shown that the ratio of the structure functions for two different materials is equal to the corresponding cross section ratio for one-photon exchange u* uT, and this result can be extrapolated to be valid for all z and Q.

13 citations