CERN Accelerating science

Article
Report number hep-ex/0206070 ; CERN-EP-2002-042 ; CERN-EP-2002-042
Title Search for Single Top Production in $e^{+} e^{-}$ Collisions at $\sqrt{s}$ up to 209 GeV
Author(s)

Heister, A. (Aachen, Tech. Hochsch.) ; Schael, S. (Aachen, Tech. Hochsch.) ; Barate, R. (Annecy, LAPP) ; Bruneliere, R. (Annecy, LAPP) ; De Bonis, I. (Annecy, LAPP) ; Decamp, D. (Annecy, LAPP) ; Goy, C. (Annecy, LAPP) ; Jezequel, S. (Annecy, LAPP) ; Lees, J.P. (Annecy, LAPP) ; Martin, F. (Annecy, LAPP) ; Merle, E. (Annecy, LAPP) ; Minard, M.N. (Annecy, LAPP) ; Pietrzyk, B. (Annecy, LAPP) ; Trocme, B. (Annecy, LAPP) ; Boix, G. (Barcelona, IFAE) ; Bravo, S. (Barcelona, IFAE) ; Casado, M.P. (Barcelona, IFAE) ; Chmeissani, M. (Barcelona, IFAE) ; Crespo, J.M. (Barcelona, IFAE) ; Fernandez, E. (Barcelona, IFAE) ; Fernandez-Bosman, M. (Barcelona, IFAE) ; Garrido, L. (Barcelona, IFAE) ; Grauges, E. (Barcelona, IFAE) ; Lopez, J. (Barcelona, IFAE) ; Martinez, M. (Barcelona, IFAE) ; Merino, G. (Barcelona, IFAE) ; Pacheco, A. (Barcelona, IFAE) ; Paneque, D. (Barcelona, IFAE) ; Ruiz, H. (Barcelona, IFAE) ; Colaleo, A. (Bari U. ; INFN, Bari) ; Creanza, D. (Bari U. ; INFN, Bari) ; De Filippis, N. (Bari U. ; INFN, Bari) ; de Palma, M. (Bari U. ; INFN, Bari) ; Iaselli, G. (Bari U. ; INFN, Bari) ; Maggi, G. (Bari U. ; INFN, Bari) ; Maggi, M. (Bari U. ; INFN, Bari) ; Nuzzo, S. (Bari U. ; INFN, Bari) ; Ranieri, A. (Bari U. ; INFN, Bari) ; Raso, G. (Bari U. ; INFN, Bari ; Palermo U.) ; Ruggieri, F. (Bari U. ; INFN, Bari) ; Selvaggi, G. (Bari U. ; INFN, Bari) ; Silvestris, L. (Bari U. ; INFN, Bari) ; Tempesta, P. (Bari U. ; INFN, Bari) ; Tricomi, A. (Bari U. ; INFN, Bari ; Catania U. ; INFN, Catania) ; Zito, G. (Bari U. ; INFN, Bari) ; Huang, X. (Beijing, Inst. High Energy Phys.) ; Lin, J. (Beijing, Inst. High Energy Phys.) ; Ouyang, Q. (Beijing, Inst. High Energy Phys.) ; Wang, T. (Beijing, Inst. High Energy Phys.) ; Xie, Y. (Beijing, Inst. High Energy Phys.) ; Xu, R. (Beijing, Inst. High Energy Phys.) ; Xue, S. (Beijing, Inst. High Energy Phys.) ; Zhang, J. (Beijing, Inst. High Energy Phys.) ; Zhang, L. (Beijing, Inst. High Energy Phys.) ; Zhao, W. (Beijing, Inst. High Energy Phys.) ; Abbaneo, D. (CERN) ; Azzurri, P. (CERN) ; Barklow, T. (CERN) ; Buchmuller, O. (CERN) ; Cattaneo, M. (CERN) ; Cerutti, F. (CERN) ; Clerbaux, B. (CERN) ; Drevermann, H. (CERN) ; Forty, R.W. (CERN) ; Frank, M. (CERN) ; Gianotti, F. (CERN) ; Greening, T.C. (CERN) ; Hansen, J.B. (CERN) ; Harvey, J. (CERN) ; Hutchcroft, D.E. (CERN) ; Janot, P. (CERN) ; Jost, B. (CERN) ; Kado, M. (CERN) ; Mato, P. (CERN) ; Moutoussi, A. (CERN) ; Ranjard, F. (CERN) ; Rolandi, Gigi (CERN) ; Schlatter, D. (CERN) ; Sguazzoni, G. (CERN) ; Tejessy, W. (CERN) ; Teubert, F. (CERN) ; Valassi, A. (CERN) ; Videau, I. (CERN) ; Ward, J.J. (CERN) ; Badaud, F. (Clermont-Ferrand U.) ; Dessagne, S. (Clermont-Ferrand U.) ; Falvard, A. (Clermont-Ferrand U.) ; Fayolle, D. (Clermont-Ferrand U.) ; Gay, P. (Clermont-Ferrand U.) ; Jousset, J. (Clermont-Ferrand U.) ; Michel, B. (Clermont-Ferrand U.) ; Monteil, S. (Clermont-Ferrand U.) ; Pallin, D. (Clermont-Ferrand U.) ; Pascolo, J.M. (Clermont-Ferrand U.) ; Perret, P. (Clermont-Ferrand U.) ; Hansen, J.D. (Bohr Inst.) ; Hansen, J.R. (Bohr Inst.) ; Hansen, P.H. (Bohr Inst.) ; Nilsson, B.S. (Bohr Inst.) ; Kyriakis, A. (Democritos Nucl. Res. Ctr.) ; Markou, C. (Democritos Nucl. Res. Ctr.) ; Simopoulou, E. (Democritos Nucl. Res. Ctr.) ; Vayaki, A. (Democritos Nucl. Res. Ctr.) ; Zachariadou, K. (Democritos Nucl. Res. Ctr.) ; Blondel, A. (Ecole Polytechnique) ; Brient, J.C. (Ecole Polytechnique) ; Machefert, F. (Ecole Polytechnique) ; Rouge, A. (Ecole Polytechnique) ; Swynghedauw, M. (Ecole Polytechnique) ; Tanaka, R. (Ecole Polytechnique) ; Videau, H. (Ecole Polytechnique) ; Ciulli, V. (Florence U. ; INFN, Florence) ; Focardi, E. (Florence U. ; INFN, Florence) ; Parrini, G. (Florence U. ; INFN, Florence) ; Antonelli, A. (Frascati) ; Antonelli, M. (Frascati) ; Bencivenni, G. (Frascati) ; Bossi, F. (Frascati) ; Capon, G. (Frascati) ; Chiarella, V. (Frascati) ; Laurelli, P. (Frascati) ; Mannocchi, G. (Frascati ; Turin, Cosmo-Geofisica Lab) ; Murtas, G.P. (Frascati) ; Passalacqua, L. (Frascati) ; Kennedy, J. (Glasgow U.) ; Lynch, J.G. (Glasgow U.) ; Negus, P. (Glasgow U.) ; O'Shea, V. (Glasgow U.) ; Thompson, A.S. (Glasgow U.) ; Wasserbaech, S. (Haverford Coll.) ; Cavanaugh, R. (Kirchhoff Inst. Phys.) ; Dhamotharan, S. (Kirchhoff Inst. Phys.) ; Geweniger, C. (Kirchhoff Inst. Phys.) ; Hanke, P. (Kirchhoff Inst. Phys.) ; Hepp, V. (Kirchhoff Inst. Phys.) ; Kluge, E.E. (Kirchhoff Inst. Phys.) ; Leibenguth, G. (Kirchhoff Inst. Phys.) ; Putzer, A. (Kirchhoff Inst. Phys.) ; Stenzel, H. (Kirchhoff Inst. Phys.) ; Tittel, K. (Kirchhoff Inst. Phys.) ; Wunsch, M. (Kirchhoff Inst. Phys.) ; Beuselinck, R. (Imperial Coll., London) ; Cameron, W. (Imperial Coll., London) ; Davies, G. (Imperial Coll., London) ; Dornan, P.J. (Imperial Coll., London) ; Girone, M. (Imperial Coll., London ; CERN) ; Hill, R.D. (Imperial Coll., London) ; Marinelli, N. (Imperial Coll., London) ; Nowell, J. (Imperial Coll., London) ; Rutherford, S.A. (Imperial Coll., London) ; Sedgbeer, J.K. (Imperial Coll., London) ; Thompson, J.C. (Imperial Coll., London) ; White, R. (Imperial Coll., London) ; Ghete, V.M. (Innsbruck U.) ; Girtler, P. (Innsbruck U.) ; Kneringer, E. (Innsbruck U.) ; Kuhn, D. (Innsbruck U.) ; Rudolph, G. (Innsbruck U.) ; Bouhova-Thacker, E. (Lancaster U.) ; Bowdery, C.K. (Lancaster U.) ; Clarke, D.P. (Lancaster U.) ; Ellis, G. (Lancaster U.) ; Finch, A.J. (Lancaster U.) ; Foster, F. (Lancaster U.) ; Hughes, G. (Lancaster U.) ; Jones, R.W.L. (Lancaster U.) ; Pearson, M.R. (Lancaster U.) ; Robertson, N.A. (Lancaster U.) ; Smizanska, M. (Lancaster U.) ; van der Aa, O. (Louvain U., Inst. Phys. Nucl.) ; Delaere, C. (Louvain U., Inst. Phys. Nucl.) ; Lemaitre, V. (Louvain U., Inst. Phys. Nucl.) ; Blumenschein, U. (Mainz U., Inst. Phys.) ; Holldorfer, F. (Mainz U., Inst. Phys.) ; Jakobs, K. (Mainz U., Inst. Phys.) ; Kayser, F. (Mainz U., Inst. Phys.) ; Kleinknecht, K. (Mainz U., Inst. Phys.) ; Muller, A.S. (Mainz U., Inst. Phys.) ; Quast, G. (Mainz U., Inst. Phys.) ; Renk, B. (Mainz U., Inst. Phys.) ; Sander, H.G. (Mainz U., Inst. Phys.) ; Schmeling, S. (Mainz U., Inst. Phys.) ; Wachsmuth, H. (Mainz U., Inst. Phys.) ; Zeitnitz, C. (Mainz U., Inst. Phys.) ; Ziegler, T. (Mainz U., Inst. Phys.) ; Bonissent, A. (Marseille, CPPM) ; Coyle, P. (Marseille, CPPM) ; Curtil, C. (Marseille, CPPM) ; Ealet, A. (Marseille, CPPM) ; Fouchez, D. (Marseille, CPPM) ; Payre, P. (Marseille, CPPM) ; Tilquin, A. (Marseille, CPPM) ; Ragusa, F. (Milan U. ; INFN, Milan) ; David, A. (Munich, Max Planck Inst.) ; Dietl, H. (Munich, Max Planck Inst.) ; Ganis, G. (Munich, Max Planck Inst.) ; Huttmann, K. (Munich, Max Planck Inst.) ; Lutjens, G. (Munich, Max Planck Inst.) ; Manner, W. (Munich, Max Planck Inst.) ; Moser, H.G. (Munich, Max Planck Inst.) ; Settles, R. (Munich, Max Planck Inst.) ; Wolf, G. (Munich, Max Planck Inst.) ; Boucrot, J. (Orsay, LAL) ; Callot, O. (Orsay, LAL) ; Davier, M. (Orsay, LAL) ; Duflot, L. (Orsay, LAL) ; Grivaz, J.F. (Orsay, LAL) ; Heusse, P. (Orsay, LAL) ; Jacholkowska, A. (Orsay, LAL ; Montpellier U.) ; Serin, L. (Orsay, LAL) ; Veillet, J.J. (Orsay, LAL) ; de Vivie de Regie, J.B. (Orsay, LAL) ; Yuan, C. (Orsay, LAL) ; Bagliesi, Giuseppe (Pisa U. ; INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Boccali, T. (Pisa U. ; INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Foa, L. (Pisa U. ; INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Giammanco, A. (Pisa U. ; INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Giassi, A. (Pisa U. ; INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Ligabue, F. (Pisa U. ; INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Messineo, A. (Pisa U. ; INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Palla, F. (Pisa U. ; INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Sanguinetti, G. (Pisa U. ; INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Sciaba, A. (Pisa U. ; INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Tenchini, R. (Pisa U. ; INFN, Pisa ; Pisa, Scuola Normale Superiore ; CERN) ; Venturi, A. (Pisa U. ; INFN, Pisa ; Pisa, Scuola Normale Superiore ; CERN) ; Verdini, P.G. (Pisa U. ; INFN, Pisa ; Pisa, Scuola Normale Superiore) ; Awunor, O. (Royal Holloway, U. of London) ; Blair, G.A. (Royal Holloway, U. of London) ; Cowan, G. (Royal Holloway, U. of London) ; Garcia-Bellido, A. (Royal Holloway, U. of London) ; Green, M.G. (Royal Holloway, U. of London) ; Jones, L.T. (Royal Holloway, U. of London) ; Medcalf, T. (Royal Holloway, U. of London) ; Misiejuk, A. (Royal Holloway, U. of London) ; Strong, J.A. (Royal Holloway, U. of London) ; Teixeira-Dias, P. (Royal Holloway, U. of London) ; Clifft, R.W. (Rutherford) ; Edgecock, T.R. (Rutherford) ; Norton, P.R. (Rutherford) ; Tomalin, I.R. (Rutherford) ; Bloch-Devaux, Brigitte (DAPNIA, Saclay) ; Boumediene, D. (DAPNIA, Saclay) ; Colas, P. (DAPNIA, Saclay) ; Fabbro, B. (DAPNIA, Saclay) ; Lancon, E. (DAPNIA, Saclay) ; Lemaire, M.C. (DAPNIA, Saclay) ; Locci, E. (DAPNIA, Saclay) ; Perez, P. (DAPNIA, Saclay) ; Rander, J. (DAPNIA, Saclay) ; Tuchming, B. (DAPNIA, Saclay) ; Vallage, B. (DAPNIA, Saclay) ; Konstantinidis, N. (UC, Santa Cruz) ; Litke, A.M. (UC, Santa Cruz) ; Taylor, G. (UC, Santa Cruz) ; Booth, C.N. (Sheffield U.) ; Cartwright, S. (Sheffield U.) ; Combley, F. (Sheffield U.) ; Hodgson, P.N. (Sheffield U.) ; Lehto, M. (Sheffield U.) ; Thompson, L.F. (Sheffield U.) ; Boehrer, Armin (Siegen U.) ; Brandt, S. (Siegen U.) ; Grupen, C. (Siegen U.) ; Hess, J. (Siegen U.) ; Ngac, A. (Siegen U.) ; Prange, G. (Siegen U.) ; Sieler, U. (Siegen U.) ; Borean, C. (Trieste U. ; INFN, Trieste) ; Giannini, G. (Trieste U. ; INFN, Trieste) ; He, H. (Washington U., Seattle) ; Putz, J. (Washington U., Seattle) ; Rothberg, J. (Washington U., Seattle) ; Armstrong, S.R. (Wisconsin U., Madison) ; Berkelman, Karl (Wisconsin U., Madison) ; Cranmer, K. (Wisconsin U., Madison) ; Ferguson, D.P.S. (Wisconsin U., Madison) ; Gao, Y. (Wisconsin U., Madison ; Tsinghua U., Beijing) ; Gonzalez, S. (Wisconsin U., Madison ; Zurich, ETH) ; Hayes, O.J. (Wisconsin U., Madison ; Zurich, ETH) ; Hu, H. (Wisconsin U., Madison ; Zurich, ETH) ; Jin, S. (Wisconsin U., Madison ; Zurich, ETH) ; Kile, J. (Wisconsin U., Madison ; Zurich, ETH) ; McNamara, P.A., III (Wisconsin U., Madison ; Zurich, ETH) ; Nielsen, J. (Wisconsin U., Madison ; Zurich, ETH) ; Pan, Y.B. (Wisconsin U., Madison ; Zurich, ETH) ; von Wimmersperg-Toeller, J.H. (Wisconsin U., Madison ; Zurich, ETH) ; Wiedenmann, W. (Wisconsin U., Madison ; Zurich, ETH) ; Wu, J. (Wisconsin U., Madison ; Zurich, ETH) ; Wu, Sau Lan (Wisconsin U., Madison ; Zurich, ETH) ; Wu, X. (Wisconsin U., Madison ; Zurich, ETH) ; Zobernig, G. (Wisconsin U., Madison ; Zurich, ETH) ; Dissertori, G. (Wisconsin U., Madison ; Zurich, ETH)

Affiliation (CERN)
Publication 2002
Imprint 14 Jun 2002
Number of pages 11
Series (ALEPH Papers)
Note 7 pagesm 3 figures Report-no: CERN-EP/2002-042
In: Phys. Lett. B 543 (2002) 173-182
DOI 10.1016/S0370-2693(02)02307-9
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LEP ; ALEPH
Abstract Single top production via the flavour changing neutral current reactions e+e- -> \bar{t}c , \bar{t}u is searched for within the 214 pb-1 of data collected by ALEPH at centre-of-mass energies between 204 and 209 GeV. No deviation from the Standard Model expectation is observed and upper limits on the single top production cross sections are derived. The combination with data collected at lower centre-of-mass energies yields an upper limit on the branching ratio BR(t -> Zc)+BR(t -> Zu) <14%, for BR(t -> \gamma c)+BR(t -> \gamma u)= 0 and mt=174 GeV/c2$.
Copyright/License Elsevier Science B.V. (License: CC-BY-3.0)



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 Record created 2002-06-27, last modified 2024-08-24


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