Phys. Rev. Lett.
68,
3398–3402
(1992)
Measurement of the ratio B(W→τν)/B(W→eν) in pp¯ collisions at √s =1.8 TeV
F. Abe et al.
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F. Abe, D. Amidei, G. Apollinari, M. Atac, P. Auchincloss, A. R. Baden, N. Bacchetta, M. W. Bailey, A. Bamberger, P. de Barbaro, B. A. Barnett, A. Barbaro-Galtieri, V. E. Barnes, T. Baumann, F. Bedeschi, S. Behrends, S. Belforte, G. Bellettini, J. Bellinger, D. Benjamin, J. Bensinger, A. Beretvas, J. P. Berge, S. Bertolucci, S. Bhadra, M. Binkley, R. Blair, C. Blocker, K. Bloom, V. Bolognesi, A. W. Booth, C. Boswell, G. Brandenburg, D. Brown, E. Buckley-Geer, H. S. Budd, G. Busetto, A. Byon-Wagner, K. L. Byrum, C. Campagnari, M. Campbell, A. Caner, R. Carey, W. Carithers, D. Carlsmith, J. T. Carroll, R. Cashmore, A. Castro, F. Cervelli, K. Chadwick, G. Chiarelli, W. Chinowsky, S. Cihangir, A. G. Clark, D. Connor, M. Contreras, J. Cooper, M. Cordelli, D. Crane, M. Curatolo, C. Day, F. DeJongh, S. Dell’Agnello, M. Dell’Orso, L. Demortier, B. Denby, P. F. Derwent, T. Devlin, D. DiBitonto, M. Dickson, R. B. Drucker, K. Einsweiler, A. Etchegoyen, J. E. Elias, R. Ely, S. Eno, S. Errede, B. Esposito, B. Flaugher, G. W. Foster, M. Franklin, J. Freeman, H. Frisch, T. Fuess, Y. Fukui, A. F. Garfinkel, A. Gauthier, S. Geer, D. W. Gerdes, P. Giannetti, N. Giokaris, P. Giromini, L. Gladney, M. Gold, K. Goulianos, H. Grassmann, C. Grosso-Pilcher, C. Haber, S. R. Hahn, R. Handler, K. Hara, R. M. Harris, J. Hauser, C. Hawk, T. Hessing, R. Hollebeek, L. Holloway, P. Hu, B. Hubbard, B. T. Huffman, R. Hughes, P. Hurst, J. Huth, J. Hylen, M. Incagli, T. Ino, H. Iso, H. Jensen, C. P. Jessop, R. P. Johnson, U. Joshi, R. W. Kadel, T. Kamon, S. Kanda, D. A. Kardelis, I. Karliner, E. Kearns, L. Keeble, R. Kephart, P. Kesten, R. M. Keup, H. Keutelian, D. Kim, S. Kim, L. Kirsch, K. Kondo, J. Konigsberg, E. Kovacs, S. E. Kuhlmann, E. Kuns, A. T. Laasanen, J. I. Lamoureux, S. Leone, J. Lewis, W. Li, T. M. Liss, P. Limon, N. Lockyer, C. B. Luchini, P. Lukens, P. Maas, M. Mangano, J. P. Marriner, M. Mariotti, R. Markeloff, L. A. Markosky, R. Mattingly, P. McIntyre, A. Menzione, T. Meyer, S. Mikamo, M. Miller, T. Mimashi, S. Miscetti, M. Mishina, S. Miyashita, Y. Morita, S. Moulding, J. Mueller, A. Mukherjee, L. F. Nakae, I. Nakano, C. Nelson, C. Newman-Holmes, J. S. T. Ng, M. Ninomiya, L. Nodulman, S. Ogawa, R. Paoletti, V. Papadimitriou, A. Para, E. Pare, S. Park, J. Patrick, T. J. Phillips, R. Plunkett, L. Pondrom, J. Proudfoot, F. Ptohos, G. Punzi, D. Quarrie, K. Ragan, G. Redlinger, J. Rhoades, M. Roach, F. Rimondi, L. Ristori, T. Rodrigo, T. Rohaly, A. Roodman, W. K. Sakumoto, A. Sansoni, R. D. Sard, A. Savoy-Navarro, V. Scarpine, P. Schalbach, E. E. Schmidt, O. Schneider, M. H. Schub, R. Schwitters, A. Scribano, S. Segler, Y. Seiya, M. Shapiro, N. M. Shaw, M. Sheaff, M. Shochet, J. Siegrist, P. Sinervo, J. Skarha, K. Sliwa, D. A. Smith, F. D. Snider, L. Song, M. Spahn, P. Sphicas, R. St. Denis, A. Stefanini, G. Sullivan, R. L. Swartz, Jr., M. Takano, F. Tartarelli, K. Takikawa, S. Tarem, D. Theriot, M. Timko, P. Tipton, S. Tkaczyk, A. Tollestrup, J. Tonnison, W. Trischuk, N. Turini, Y. Tsay, F. Ukegawa, D. Underwood, S. Vejcik, III, R. Vidal, R. G. Wagner, R. L. Wagner, N. Wainer, J. Walsh, T. Watts, R. Webb, C. Wendt, H. Wenzel, W. C. Wester, III, T. Westhusing, S. N. White, A. B. Wicklund, H. H. Williams, B. L. Winer, J. Wyss, A. Yagil, K. Yasuoka, G. P. Yeh, J. Yoh, M. Yokoyama, J. C. Yun, A. Zanetti, F. Zetti, and S. Zucchelli
Argonne National Laboratory, Argonne, Illinois 60439
Brandeis University, Waltham, Massachusetts 02254
University of Chicago, Chicago, Illinois 60637
Fermi National Accelerator Laboratory, Batavia, Illinois 60510
Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, Frascati, Italy
Harvard University, Cambridge, Massachusetts 02138
University of Illinois, Urbana, Illinois 61801
The Johns Hopkins University, Baltimore, Maryland 21218
National Laboratory for High Energy Physics (KEK), Tsukuba, Ibaraki, Japan
Lawrence Berkeley Laboratory, Berkeley, California 94720
Sezione di Padova, Istituto Nazionale di Fisica Nucleare, Universitá di Padova, I-35131 Padova, Italy
University of Pennsylvania, Philadelphia, Pennsylvania 19104
Istituto Nazionale di Fisica Nucleare, University and Scuola Normale Superiore of Pisa, I-56100 Pisa, Italy
Purdue University, West Lafayette, Indiana 47907
University of Rochester, Rochester, New York 14627
Rockefeller University, New York, New York 10021
Rutgers University, Piscataway, New Jersey 08854
Texas A&M University, College Station, Texas 77843
University of Tsukuba, Tsukuba, Ibaraki 305, Japan
Tufts University, Medford, Massachusetts 02155
University of Wisconsin–Madison, Madison, Wisconsin 53706
Received 26 December 1991; published in the issue dated 8 June 1992
We have observed over 102 events of the type W→τν followed by τ→ hadrons, where the taus are identified by their decay into one or three charged particles. We measure the cross section times branching ratio for pp¯→W→τν and compare it to the value for W→eν to directly measure the ratio of weak coupling constants gτ/ge. We find gτ/ge=0.97±0.07, consistent with lepton universality.
© 1992 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.68.3398
DOI:
10.1103/PhysRevLett.68.3398
PACS:
13.38.+c, 13.10.+q, 13.85.Qk, 14.60.-z
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