학술논문

Measurement of the leptonic branching ratios of the τ lepton
Document Type
Original Paper
Author
Akers, R.Alexander, G.Allison, J.Ametewee, K.Anderson, K. J.Arcelli, S.Asai, S.Axen, D.Azuelos, G.Ball, A. H.Barberio, E.Barlow, R. J.Bartoldus, R.Batley, J. R.Beaudoin, G.Beck, A.Beck, G. A.Beeston, C.Behnke, T.Bell, K. W.Bella, G.Bentvelsen, S.Berlich, P.Bethke, S.Biebel, O.Bloodworth, I. J.Bock, P.Bosch, H. M.Boutemeur, M.Braibant, S.Bright-Thomas, P.Brown, R. M.Buijs, A.Burckhart, H. J.Bürgin, R.Burgard, C.Capdevielle, N.Capiluppi, P.Carnegie, R. K.Carter, A. A.Carter, J. R.Chang, C. Y.Charlesworth, C.Charlton, D. G.Chu, S. L.Clarke, P. E. L.Clayton, J. C.Clowes, S. G.Cohen, I.Conboy, J. E.Cooke, O. C.Cuffiani, M.Dado, S.Dallapiccola, C.Dallavalle, G. M.Darling, C.De Jong, S.del Pozo, L. A.Deng, H.Dittmar, M.Dixit, M. S.do Couto e Silva, E.Duboscq, J. E.Duchovni, E.Duckeck, G.Duerdoth, I. P.Dunwoody, U. C.Edwards, J. E. G.Elcombe, P. A.Estabrooks, P. G.Etzion, E.Evans, H. G.Fabbri, F.Fabbro, B.Fanti, M.Fath, P.Fierro, M.Fincke-Keeler, M.Fischer, H. M.Fischer, P.Folman, R.Fong, D. G.Foucher, M.Fukui, H.Fürtjes, A.Gagnon, P.Gaidot, A.Gary, J. W.Gascon, J.Geddes, N. I.Geich-Gimbel, C.Gensler, S. W.Gentit, F. X.Geralis, T.Giacomelli, G.Giacomelli, P.Giacomelli, R.Gibson, V.Gibson, W. R.Gillies, J. D.Goldberg, J.Gingrich, D. M.Goodrick, M. J.Gorn, W.Grandi, C.Gross, E.Hagemann, J.Hanson, G. G.Hansroul, M.Hargrove, C. K.Hart, P. A.Hauschild, M.Hawkes, C. M.Heflin, E.Hemingway, R. J.Herten, G.Heuer, R. D.Hill, J. C.Hillier, S. J.Hilse, T.Hobson, P. R.Hochman, D.Homer, R. J.Honma, A. K.Howard, R.Hughes-Jones, R. E.Igo-Kemenes, P.Imrie, D. C.Jawahery, A.Jeffreys, P. W.Jeremie, H.Jimack, M.Jones, M.Jones, R. W. L.Jovanovic, P.Jui, C.Karlen, D.Kanzaki, J.Kawagoe, K.Kawamoto, T.Keeler, R. K.Kellogg, R. G.Kennedy, B. W.King, B.King, J.Kirk, J.Kluth, S.Kobayashi, T.Kobel, M.Koetke, D. S.Kokott, T. P.Komamiya, S.Kowalewski, R.Kress, T.Krieger, P.von Krogh, J.Kyberd, P.Lafferty, G. D.Lafoux, H.Lahmann, R.Lai, W. P.Lauber, J.Layter, J. G.Leblanc, P.Lee, A. M.Lefebvre, E.Lellouch, D.Leroy, C.Letts, J.Levinson, L.Lloyd, S. L.Loebinger, F. K.Long, G. D.Lorazo, B.Losty, M. J.Lou, X. C.Ludwig, J.Luig, A.Mannelli, M.Marcellini, S.Markus, C.Martin, A. J.Martin, J. P.Mashimo, T.Matthews, W.Mättig, P.Maur, U.McKenna, J.McMahon, T. J.McNab, A. I.Meijers, F.Merritt, F. S.Mes, H.Michelini, A.Middleton, R. P.Mikenberg, G.Miller, D. J.Mir, R.Mohr, W.Montanari, A.Mori, T.Morii, M.Müller, U.Nellen, B.Nijjhar, B.O'Neale, S. W.Oakham, F. G.Odorici, F.Ogren, H. O.Oldershaw, N. J.Oram, C. J.Oreglia, M. J.Orito, S.Palmonari, F.Pansart, J. P.Patrick, G. N.Pearce, M. J.Phillips, P. D.Pilcher, J. E.Pinfold, J.Plane, D. E.Poffenberger, P.Poli, B.Posthaus, A.Pritchard, T. W.Przysiezniak, H.Redmond, M. W.Rees, D. L.Rigby, D.Rison, M. G.Robins, S. A.Robinson, D.Rodning, N.Roney, J. M.Ros, E.Rossi, A. M.Rosvick, M.Routenburg, P.Rozen, Y.Runge, K.Runolfsson, O.Rust, D. R.Sasaki, M.Sbarra, C.Schaile, A. D.Schaile, O.Scharf, F.Scharff-Hansen, P.Schenk, P.Schmitt, B.Schröder, M.Schultz-Coulon, H. C.Schütz, P.Schulz, M.Schwick, C.Schwiening, J.Scott, W. G.Settles, M.Shears, T. G.Shen, B. C.Shepherd-Themistocleous, C. H.Sherwood, P.Siroli, G. P.Skillman, A.Skuja, A.Smith, A. M.Smith, T. J.Snow, G. A.Sobie, R.Söldner-Rembold, S.Springer, R. W.Sproston, M.Stahl, A.Starks, M.Stegmann, C.Stephens, K.Steuerer, J.Stockhausen, B.Strom, D.Szymanski, P.Tafirout, R.Takeda, H.Takeshita, T.Taras, P.Tarem, S.Tecchio, M.Teixeira-Dias, P.Tesch, N.Thomson, M. A.Tousignant, O.Towers, S.Tscheulin, M.Tsukamoto, T.Turcot, A. S.Turner-Watson, M. F.Utzat, P.Van Kooten, R.Vasseur, G.Vikas, P.Vincter, M.Wagner, A.Wagner, D. L.Ward, C. P.Ward, D. R.Ward, J. J.Watkins, P. M.Watson, A. T.Watson, N. K.Weber, P.Wells, P. S.Wermes, N.Wilkens, B.Wilson, G. W.Wilson, J. A.Winterer, V-H.Wlodek, T.Wolf, G.Wotton, S.Wyatt, T. R.Yeaman, A.Yekutieli, G.Yurko, M.Zacek, V.Zeuner, W.Zorn, G. T.OPAL Collaboration
Source
Zeitschrift für Physik C Particles and Fields. December 1995 66(4):543-554
Subject
Language
English
ISSN
0170-9739
1431-5858
Abstract
The leptonic branching ratios of the tau lepton have been determined from data collected by the OPAL detector in 1991 and 1992. From a sample of 27196 e+e→τ+τ candidates we find 7322$$R_\tau = B(\tau \to hadrons + \nu _\tau )/B(\tau \to e\bar \nu _e \nu _\tau )$$ is calculated using our measured values of the leptonic branching fractions of the tau and tau lifetime from which a value of αs(Q2=Mτ2) is extracted. The value of αs(Q2=MZ2) is obtained byQ2 evolution and agrees with the value from the Z0 line shape analysis.