A study of muon pair production and evidence for tau pair production in photon-photon collisions at LEP

P. Bock, A. K. Honma, Sachio Komamiya, C. Wahl, G. J. VanDalen, J. Ludwig, P. M. Hattersley, R. Humbert, G. A. Beck, D. Van den plas, A. Luig, M. Jimack, R. J. Barlow, R. W. Springer, R.J. Akers, Takehiko Mori, R. Lahmann, B. Nellen, J. P. Pansart, D. J. Miller, G. Beaudoin, A. Beck, R. Mir, A. J. Martin, S. Orito, J. R. Carter, R. D. Heuer, C. Burgard, Gideon Alexander, Kiyotomo Kawagoe, P. Teixeira-Dias, P. S. Wells, K. Runge, H. J. Burckhart, Shlomo Dado, E. Lefebvre, Terry Richard Wyatt, D. J.P. Dumas, John Hobbs, R. Giacomelli, W. Mohr, M. W. Redmond, D. Hochman, Tetsuro Mashimo, M. S. Dixit, M. J. Oreglia, H. Przysiezniak, J. C. Hill, F. S. Merritt, F. K. Loebinger, D. G. Fong, M. A. Thomson, F. Odorici, S. W. Gensler, W. R. Gibson, S. Wotton, U. Müller, P. A. Elcombe, M. Coupland, James Pinfold, J. G. Layter, M. F. Turner, B. C. Shen, Stephen Lloyd, Silvia Arcelli, J. King, J. M. Roney, R. E. Hughes-Jones, Achim Stahl, R. Van Kooten, J. Gascon, A. Astbury, Paolo Capiluppi, I. Cohen, D. S. Koetke, O. Runolfsson, D. G. Charlton, R. J. Hemingway, Claude Leroy, K. J. Anderson, M. Hauschild, N. Tesch, J. Kroll, N. J. Tresilian, D. L. Wagner, A. A. Carter, P. Routenburg, P. Jovanovic, A. D. Schaile, E. Ros, D. E. Plane, Peter R Hobson, G. Vasseur, M. Fierro, P. Poffenberger, Misao Sasaki, C. Stegmann, R. K. Carnegie, C. J. Oram, D. M. Strom, P. Weber, P. M. Watkins, H. M. Fischer, E. Torrente-Lujan, P. E.L. Clarke, B. Wilkens, G. M. Dallavalle, Dave Robinson, J. Lauber, T. Kobayashi, B. W. Kennedy, M. Settles, Christoph Geich-Gimbel, Alessandro Montanari, U. Maur, M. Hansroul, C. Jui, B. Panzer-Steindel, G. P. Siroli, G. Transtromer, J. P. Martin, C. H. Shepherd-Themistocleous, G. Yekutieli, Frans Meijers, J. Steuerer, R. J. Homer, C. M. Hawkes, V. H. Winterer, A. M. Rossi, J. Becker, P. F. Harrison, T. P. Kokott, H. G. Evans, M. Foucher, Shlomit Tarem, Horst Breuker, P. Paschievici, D. R. Ward, A. Skillman, E. do Couto e Silva, W. Schappert, K. W. Bell, G. A. Snow, D. Karlen, T. J. McMahon, Harold Nguyen, D. Axen, E. Heflin, G. Duckeck, J. C. Clayton, M. Rosvick, G. Quast, C. Sbarra, K. Stephens, B. Poli, Madjid Boutemeur, Richard Keeler, J. von Krogh, M. Yurko, R. Yaari, H. Jeremie, P. G. Estabrooks, F. X. Gentit, Gregor Herten, W. Gorn, D. C. Imrie, Austin Ball, Ehud Duchovni, N. I. Geddes, Norbert Wermes, G. E. Richards, P. Mättig, C. Beeston, S. J. Hillier, G. D. Lafferty, A. Buijs, John Baines, Giora Mikenberg, M. J. Pearce, T. Wlodek, Andris Skuja, Margret Fincke-Keeler, Roger Jones, J. F. Kral, A. M. Smith, A. M. Lee, T. Kawamoto, P. Berlich, A. Jawahery, P. Bentkowski, P. Leblanc, James Letts, John Allison, V. Gibson, J. M. Lorah, H. Lafoux, M. H. Lehto, H. O. Ogren, M. Mori, D. L. Rees, S. Rossberg, L. A. del Pozo, Claudio Grandi, A. Gaidot, M. Cooper, A. C. Janissen, B. Schmitt, Gordon H. Hanson, D. Pitman, J. Goldberg, O. Schaile, Max Weber, M. J. Goodrick, A. Yeaman, Gunter Wolf, Matthias Schröder, P. Bright-Thomas, Lorne Levinson, Wolfram Dietrich Zeuner, T. Tsukamoto, M. Tecchio, D. M. Gingrich, Erez Etzion, B. Fabbro, S. Barnett, T. Hilse, J. E. Pilcher, M. Jones, Alexander Wagner, G. Giacomelli, M. Sproston, J. Schwiening, D. Menszner, B. Boden, Jacqueline Batley, Stefan Kluth, D. A. Hinshaw, N. K. Watson, S. De Jong, R. M. Brown, H. M. Bosch, J. R. McNutt, Sherry Towers, T. W. Pritchard, J. D. Gillies, I. J. Bloodworth, J. Banks, J. A. Wilson, S. Bethke, J. E. Conboy, Fabrizio Fabbri, Daniel Lellouch, H. Takeda, N. Paz-Jaoshvili, D. R. Rust, Tohru Takeshita, H. Ihssen, R. Ströhmer, Stefano Marcellini, C. K. Hargrove, S. L. Chu, P. Pfister, H. Mes, J. Hart, J. Hagemann, J. A. McKenna, J. W. Gary, F. G. Oakham, I. P. Duerdoth, P. Scharff-Hansen, R. P. Middleton, Michael Dittmar, R. Kowalewski, A. Michelini, Paul Kyberd, W. G. Scott, Gideon Bella, G. W. Wilson, P. Igo-Kemenes, F. Scharf, M. J. Losty, P. W. Jeffreys, X. C. Lou, Marcello Mannelli, A. Rollnik, Marco Cuffiani, M. G. Rison, G. N. Patrick, C. P. Ward, J. Mildenberger, R. G. Kellogg, Otmar Biebel, M. A. Whalley, A. Dieckmann, Tara Shears, C. Markus, C. Y. Chang, Peter Sherwood, T. Behnke, P. Schenk, J. E. Duboscq, Alan Watson, H. Deng, C. Moisan, G. T. Zorn, Randall Sobie, F. C. Grant, Christoph Schwick, T. J. Smith, Georges Azuelos, H. von der Schmitt, S. A. Robins, R. Bartoldus, B. Lorazo, S. W. O'Neale

doi:10.1007/bf01558388

We have studied the reactionsγγ→μ + μ − andγγ→τ + τ − by measuring the properties of events of the typese + e −→e + e − μ + μ − ande + e −→e + e − τ + τ − ate + e − centre-of-mass energies between 88 and 94 GeV. The data sample corresponds to an integratede + e − luminosity of 40.4 pb−1 collected by the OPAL detector at LEP. The QED structure functionF 2 is extracted from a sample of 1462γγ→μ + μ − events in which one photon is off the mass shell (single-tagged). TheQ 2 range for these massive photons is 4–400 GeV2, with an averageQ 2 of 8 GeV2. We have observed 48e + e −→e + e − μ + μ − events in which both final state electrons are detected. In the sample of single-tag events we have identified 34.9±6.7 events as due to the reactionγ;→τ + τ −, on an estimated background of 5.1±2.7 events. In all cases the measured event distributions agree with QED calculations.

A study of muon pair production and evidence for tau pair production in photon-photon collisions at LEP

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A study of muon pair production and evidence for tau pair production in photon-photon collisions at LEP

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この論文をさがす

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収録刊行物

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書き出し

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