1. Measurement of the τ topological branching ratios at LEP
- Author
-
Acton, P D, Alexander, Gideon, Allison, J, Allport, P P, Anderson, K J, Arcelli, S, Astbury, Alan, Axen, D A, Azuelos, Georges, Bahan, G A, Baines, J T M, Ball, A H, Banks, J, Barker, G J, Barlow, R J, Barnett, S, Batley, J Richard, Beaudoin, G, Beck, A, Becker, J, Behnke, T, Bell, K W, Bella, G, Berlich, P, Bethke, Siegfried, Biebel, O, Binder, U, Bloodworth, Ian J, Bock, P, Boden, B, Bosch, H M, Bougerolle, S, Breuker, Horst, Brown, R M, Brun, R, Buijs, A, Burckhart, Helfried J, Capiluppi, P, Carnegie, R K, Carter, A A, Carter, J R, Chang, C Y, Charlton, D G, Clarke, P E L, Cohen, I, Collins, W J, Conboy, J E, Cooper, M, Couch, M, Coupland, M, Cuffiani, M, Dado, S, Dallavalle, G M, De Jong, S, del Pozo, L A, Deninno, M M, Dieckmann, A, Dittmar, Michael, Dixit, M S, do Couto e Silva, E, Duboscq, J E, Duchovni, E, Duckeck, G, Duerdoth, I P, Dumas, D J P, Elcombe, P A, Estabrooks, P G, Etzion, E, Evans, H G, Fabbri, Franco Luigi, Fincke-Keeler, Margret, Fischer, H M, Fong, D G, Fukunaga, C, Gaidot, A, Ganel, O, Gary, J W, Gascon, J, McGowan, R F, Geddes, N I, Geich-Gimbel, C, Gensler, S W, Gentit, F X, Giacomelli, G, Gibson, V, Gibson, W R, Gillies, James D, Goldberg, J, Goodrick, M J, Gorn, W, Grandi, C, Grant, F C, Hagemann, J, Hanson, G G, Hansroul, M, Hargrove, C K, Harrison, P F, Hart, J, Hattersley, P M, Hauschild, M, Hawkes, C M, Heflin, E, Hemingway, Richard J, Heuer, R D, Hill, J C, Hillier, S J, Hinshaw, D A, Hobbs, J D, Hobson, P R, Hochman, D, Homer, R James, Honma, A K, Hou, S R, Howarth, C P, Hughes-Jones, R E, Humbert, R, Igo-Kemenes, P, Ihssen, H, Imrie, D C, Janissen, L, Jawahery, A, Jeffreys, P W, Jeremie, H, Jimack, Martin Paul, Jobes, M, Jones, R W L, Jovanovic, P, Karlen, D A, Kawagoe, K, Kawamoto, T, Keeler, Richard K, Kellogg, R G, Kennedy, B W, Klem, D E, Kobayashi, T, Kokott, T P, Komamiya, S, Köpke, L, Kral, F, Kowalewski, R V, Von Krogh, J, Kroll, J, Kuwano, M, Kyberd, P, Lafferty, G D, Lamarche, F, Layter, J G, Le Dû, P, Leblanc, P, Lee, A M, Lehto, M H, Lellouch, Daniel, Lennert, P, Leroy, C, Letts, J, Levegrün, S, Levinson, L, Lloyd, S L, Loebinger, F K, Lorah, J M, Lorazo, B, Losty, Michael J, Lou, X C, Ludwig, J, Mannelli, M, Marcellini, S, Maringer, G, Martin, A J, Martin, J P, Mashimo, T, Mättig, P, Maur, U, McKenna, J A, McMahon, T J, McNutt, J R, Meijers, F, Menszner, D, Merritt, F S, Mes, H, Michelini, Aldo, Middleton, R P, Mikenberg, G, Mildenberger, J L, Miller, D J, Milstene, C, Mir, R, Mohr, W, Moisan, C, Montanari, A, Mori, T, Mouthuy, T, Nellen, B, Nguyen, H H, O'Neale, S W, Oakham, F G, Odorici, F, Ogg, M, Ögren, H O, Oh, J H, Oram, C J, Oreglia, M J, Orito, S, Pansart, J P, Panzer-Steindel, B, Paschievici, P, Patrick, G N, Paz-Jaoshvili, N, Pfister, P, Pilcher, J E, Pitman, D, Plane, D E, Poffenberger, P R, Poli, B, Pouladdej, A, Prebys, E J, Pritchard, T W, Przysiezniak, H, Quast, G, Redmond, M W, Rees, D L, Richards, G E, Riles, K, Robins, S A, Robinson, D, Rollnik, A, Roney, J M, Ros, E, Rossberg, S, Rossi, A M, Rosvick, M, Routenburg, P, Runge, K, Runólfsson, O, Rust, D R, Sanghera, S, Sasaki, M, Sbarra, C, Schaile, A D, Schaile, O, Schappert, W, Scharff-Hansen, P, Schenk, P, von der Schmitt, H, Schreiber, S, Schwick, C, Schwiening, J, Scott, W G, Settles, M, Shen, B C, Sherwood, P, Shypit, R L, Simon, A, Singh, P, Siroli, G P, Skuja, A, Smith, A M, Smith, T J, Snow, G A, Sobie, Randall J, Springer, R W, Sproston, M, Stephens, K, Steuerer, J, Ströhmer, R, Strom, D, Takeda, H, Takeshita, T, Taras, P, Tarem, S, Teixeira-Dias, P, Tesch, N, Thackray, N J, Tranströmer, G, Tresilian, N J, Tsukamoto, T, Turner, M F, Tysarczyk-Niemeyer, G, Van den Plas, D, Van Kooten, R, VanDalen, G J, Vasseur, G, Virtue, C J, Wagner, A, Wagner, D L, Wahl, C, Walker, J P, Ward, C P, Ward, D R, Watkins, P M, Watson, A T, Watson, N K, Weber, M, Weber, P, Weisz, S, Wells, P S, Wermes, N, Whalley, M A, Wilson, G W, Wilson, J A, Winterer, V H, Wlodek, T, Wotton, S A, Wyatt, T R, Yaari, R, Yekutieli, G, Yurko, M, Zeuner, W, and Zorn, G T
- Subjects
Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Particle physics ,Branching fraction ,Electron–positron annihilation ,Particle Data Group ,Branching (polymer chemistry) ,lcsh:Physics ,lcsh:QC1-999 ,Particle Physics - Experiment ,Charged particle ,Lepton - Abstract
The inclusive branching ratios of the τ lepton to one, three and five charged particle final states are measured from data collected with the OPAL detector at LEP. The data sample consists of 12707e + e − → τ + τ − candidate events and has an estimated background of 1.9%. The branching ratios are obtained from a simultaneous fit to the data which gives B 1 = 84.48 ± 0.27 (stat) ±0.23 (sys)%, B 3 = 15.26±0.26±0.22% and B 5 = 0.26±0.06±0.05% respectively where B 1 + B 3 + B 5 is constrained to equal one. The inclusive one-prong branching ratio is found to be significantly lower than the 1990 Particle Data Group world average while the branching ratio to three charged particles is correspondingly higher. The five-prong branching ratio is in agreement with the world average measurement.
- Published
- 1992