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Measurement of the transverse spin correlations in the decay Z → τ+τ-

  • R. Barate
  • , D. Buskulic
  • , D. Decamp
  • , P. Ghez
  • , C. Goy
  • , J. P. Lees
  • , A. Lucotte
  • , M. N. Minard
  • , J. Y. Nief
  • , B. Pietrzyk
  • , M. P. Casado
  • , M. Chmeissani
  • , P. Comas
  • , J. M. Crespo
  • , M. Delfino
  • , E. Fernandez
  • , M. Fernandez-Bosman
  • , LI Garrido
  • , A. Juste
  • , M. Martinez
  • R. Miquel, L. M. Mir, S. Orteu, C. Padilla, I. C. Park, A. Pascual, J. A. Perlas, I. Riu, F. Sanchez, F. Teubert, A. Colaleo, D. Creanza, M. de Palma, G. Gelao, G. Iaselli, G. Maggi, M. Maggi, N. Marinelli, S. Nuzzo, A. Ranieri, G. Raso, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, A. Tricomi, G. Zito, X. Huang, J. Lin, Q. Ouyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, D. Abbaneo, R. Alemany, U. Becker, A. O. Bazarko, P. Bright-Thomas, M. Cattaneo, F. Cerutti, G. Dissertori, H. Drevermann, R. W. Forty, M. Frank, R. Hagelberg, J. B. Hansen, J. Harvey, P. Janot, B. Jost, E. Kneringer, J. Knobloch, I. Lehraus, G. Lutters, P. Mato, A. Minten, L. Moneta, A. Pacheco, J. F. Pusztaszeri, F. Ranjard, G. Rizzo, L. Rolandi, D. Rousseau, D. Schlatter, M. Schmitt, O. Schneider, W. Tejessy, I. R. Tomalin, H. Wachsmuth, A. Wagner, Z. Ajaltouni, A. Barrès, C. Boyer, A. Falvard, C. Ferdi, P. Gay, C. Guicheney, P. Henrard, J. Jousset, B. Michel, S. Monteil, J. C. Montret, D. Pallin, P. Perret, F. Podlyski, J. Proriol, P. Rosnet, J. M. Rossignol, T. Fearnley, J. D. Hansen, J. R. Hansen, P. H. Hansen, B. S. Nilsson, B. Rensch, A. Wäänänen, G. Daskalakis, A. Kyriakis, C. Markou, E. Simopoulou, I. Siotis, A. Vayaki, A. Blondel, G. Bonneaud, J. C. Brient, P. Bourdon, A. Rougé, M. Verderi, H. Videau, D. J. Candlin, M. I. Parsons, E. Focardi, G. Parrini, K. Zachariadou, M. Corden, C. Georgiopoulos, G. Bencivenni, G. Bologna, F. Bossi, P. Campana, G. Capon, D. Casper, V. Chiarella, G. Felici, P. Laurelli, G. Mannocchi, F. Murtas, G. P. Murtas, L. Passalacqua, M. Pepe-Altarelli, L. Curtis, S. J. Dorris, A. W. Halley, I. G. Knowles, J. G. Lynch, V. O'Shea, C. Raine, J. M. Scarr, K. Smith, P. Teixeira-Dias, A. S. Thompson, E. Thomson, F. Thomson, R. M. Turnbull, C. Geweniger, G. Graefe, P. Hanke, G. Hansper, V. Hepp, E. E. Kluge, A. Putzer, M. Schmidt, J. Sommer, K. Tittel, S. Werner, M. Wunsch, R. Beuselinck, D. M. Binnie, W. Cameron, PJ Dornan, M. Girone, S. Goodsir, E. B. Martin, A. Moutoussi, J. Nash, J. K. Sedgbeer, P. Spagnolo, A. M. Stacey, M. D. Williams, V. M. Ghete, P. Girtler, D. Kuhn, G. Rudolph, A. P. Betteridge, C. K. Bowdery, P. Colrain, G. Crawford, A. J. Finch, F. Foster, G. Hughes, R. W. Jones, T. Sloan, M. I. Williams, A. Galla, I. Giehl, A. M. Greene, C. Hoffmann, K. Jakobs, K. Kleinknecht, G. Quast, B. Renk, E. Rohne, H. G. Sander, P. van Gemmeren, C. Zeitnitz, J. J. Aubert, C. Benchouk, A. Bonissent, G. Bujosa, D. Calvet, J. Carr, P. Coyle, C. Diaconu, F. Etienne, N. Konstantinidis, O. Leroy, F. Motsch, P. Payre, M. Talby, A. Sadouki, M. Thulasidas, K. Trabelsi, M. Aleppo, F. Ragusa, R. Berlich, W. Blum, V. Büscher, H. Dietl, G. Ganis, C. Gotzhein, H. Kroha, G. Lütjens, G. Lutz, W. Manner, H. G. Moser, R. Richter, A. Rosado-Schlosser, S. Schael, R. Settles, H. Seywerd, R. S. Denis, H. Stenzel, W. Wiedenmann, G. Wolf, J. Boucrot, O. Callot, S. Chen, Y. Choi, A. Cordier, M. Davier, L. Duflot, J. F. Grivaz, P. Heusse, A. Höcker, A. Jacholkowska, M. Jacquet, D. W. Kim, F. Le Diberder, J. Lefrançois, A. M. Lutz, I. Nikolic, M. H. Schune, S. Simion, E. Tournefier, J. J. Veillet, I. Videau, D. Zerwas, P. Azzurri, G. Bagliesi, G. Batignani, S. Bettarini, C. Bozzi, G. Calderini, M. Carpinelli, M. A. Ciocci, V. Ciulli, R. Dell'Orso, R. Fantechi, I. Ferrante, L. Foà, F. Forti, A. Giassi, M. A. Giorgi, A. Gregorio, F. Ligabue, A. Lusiani, P. S. Marrocchesi, A. Messineo, F. Palla, G. Sanguinetti, A. Sciabà, J. Steinberger, R. Tenchini, G. Tonelli, C. Vannini, A. Venturi, P. G. Verdini, G. A. Blair, L. M. Bryant, J. T. Chambers, Y. Gao, M. G. Green, T. Medcalf, P. Perrodo, J. A. Strong, J. H. von Wimmersperg-Toeller, D. R. Botterill, R. W. Clifft, T. R. Edgecock, S. Haywood, P. Maley, P. R. Norton, J. C. Thompson, A. E. Wright, B. Bloch-Devaux, P. Colas, S. Emery, W. Kozanecki, E. Lançon, M. C. Lemaire, E. Locci, P. Perez, J. Rander, J. F. Renardy, A. Roussarie, J. P. Schuller, J. Schwindling, A. Trabelsi, B. Vallage, S. N. Black, J. H. Dann, R. P. Johnson, H. Y. Kim, A. M. Litke, M. A. McNeil, G. Taylor, C. N. Booth, R. Boswell, C. A.J. Brew, S. Cartwright, F. Combley, M. S. Kelly, M. Lehto, W. M. Newton, J. Reeve, L. F. Thompson, A. Böhrer, S. Brandt, G. Cowan, C. Grupen, P. Saraiva, L. Smolik, F. Stephan, M. Apollonio, L. Bosisio, R. Delia Marina, G. Giannini, B. Gobbo, G. Musolino, J. Rothberg, S. Wasserbaech, S. R. Armstrong, E. Charles, P. Elmer, D. P.S. Ferguson, S. Gonzalez, T. C. Greening, OJ Hayes, H. Hu, S. Jin, P. A. McNamara, J. M. Nachtman, J. Nielsen, W. Orejudos, Y. B. Pan, Y. Saadi, I. J. Scott, J. Walsh, S. L. Wu, X. Wu, J. M. Yamartino, G. Zobernig
  • Université Paris-Sud
  • Institut de F'ísica d'Altes Energies
  • University of São Paulo
  • University of Barcelona
  • INFN Sezione di Bari
  • Dipartimento di Fisica
  • INFN Sezione di Catania
  • Institute of High Energy Physics, Chinese Academy of Sciences
  • European Organization for Nuclear Research
  • Princeton University
  • Cornell University College of Engineering
  • Schweizerischer Bankverein
  • Université Blaise Pascal
  • Niels Bohr Institutet
  • NCSR Demokritos
  • Department of Physics
  • University of Edinburgh
  • University of Florence
  • Supercomputer Computations Research Institute
  • Florida State University
  • LNF-INFN
  • University of Turin
  • Ev-K2-CNR Committee
  • Department of Physics and Astronomy
  • University of Glasgow
  • Institut für Hochenergiephysik
  • University of Heidelberg
  • Department of Physics
  • Imperial College London
  • University of Innsbruck
  • Lancaster University
  • Institut fiir Physik
  • Johannes Gutenberg University
  • Dipartimento di Fisica
  • Sezione INFN di Milano
  • Max-Planck-Institut für Physik
  • Laboratoire de l'Accélérateur Linéaire
  • Sungkyunkwan University
  • Kangwon National University
  • Dipartimento di Fisica deU'Universìtà
  • Scuola Normale Superiore di Pisa
  • Istituto di Matematica e Fisica
  • Dipartimento di Scienze Biomediche
  • Department of Physics
  • Royal Holloway University of London
  • Rutherford Appleton Laboratory
  • CEA/UVSQ/CNRS
  • University of California at Santa Cruz
  • Department of Physics
  • The University of Sheffield
  • Fachbereich Physik
  • Universität Siegen
  • Dipartimento di Fisica
  • University of Trieste
  • Experimental Elementary Particle Physics
  • University of Washington
  • University of Wisconsin-Madison

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

For τ leptons produced in e+e-→ τ+τ-interactions there are, in addition to the longitudinal spin correlations, two independent transverse spin correlations associated with the transverse (within the production plane) and normal (to the production plane) polarization components. A measurement of the transverse-transverse and transverse-normal T spin correlations in the decay Z → τ+τ-, CTT and CTN, is presented based on the aplanarity angle of the decay products of both τ leptons. Using 80 pb-1 of data collected by ALEPH on the peak of the Z resonance, the results are CTT = 1.06±0.13(stat)±0.05(syst), and CTN = 0.08 ± 0.13(stat)±0.04(syst). These values are in agreement with the Standard Model predictions, CTT = 0.99 and CTN = -0.01.

Original languageEnglish
Pages (from-to)191-201
Number of pages11
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume405
Issue number1-2
DOIs
Publication statusPublished - 17 Jul 1997

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