Abstract
The couplings of the Z0 to charged leptons are studied using measurements of the lepton pair cross sections and forward-backward asymmetries at centre of mass energies near to the mass of the Z0. The data are consistent with lepton universality. Using a parametrisation of the lepton pair differential cross section which assumes that the Z0 has only vector and axial couplings to leptons, the charged leptonic partial decay width of the Z0 is determined to be G{cyrillic}ol+ol- = 83.1±1.9 MeV and the square of the product of the effective axial vector and vector coupling constants of the Z0 to charged leptons to be a ̌2 ol v ̌2 ol = 0.0039± 0.0083, in agreement with the standard model. A parametrisation in the form of the improved Born approximation gives effective leptonic axial vector and vector coupling constants a ̌2 ol = 0.998±0.024 and v ̌2 ol = 0.0044±0.0083. In the framework of the standard model, the values of the parameters ρ{variant}z and sin2θw are found to be 0.998±0.024 and 0.233+0.045 -0.012 respectively. Using the relationship in the minimal standard model between ρ{variant}z and sin2θw, the results sin2θSM w = 0.233+0.007 -0.006 is obtained. Our previously published measurement of the ratio of the hadronic to the leptonic partial width of the Z0 is update: Rz = 21.72+0.71 -0.65.
| Original language | English |
|---|---|
| Pages (from-to) | 458-472 |
| Number of pages | 15 |
| Journal | Physics Letters B |
| Volume | 247 |
| Issue number | 2-3 |
| DOIs | |
| Publication status | Published - Sept 13 1990 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
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In: Physics Letters B, Vol. 247, No. 2-3, 13.09.1990, p. 458-472.
Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Analysis of Z0 couplings to charged leptons
AU - Akrawy, M. Z.
AU - Alexander, G.
AU - Allison, J.
AU - Allport, P. P.
AU - Anderson, K. J.
AU - Armitage, J. C.
AU - Arnison, G. T.J.
AU - Ashton, P.
AU - Azuelos, G.
AU - Baines, J. T.M.
AU - Ball, A. H.
AU - Banks, J.
AU - Barker, G. J.
AU - Barlow, R. J.
AU - Batley, J. R.
AU - Becker, J.
AU - Behnke, T.
AU - Bell, K. W.
AU - Bella, G.
AU - Bethke, S.
AU - Biebel, O.
AU - Binder, U.
AU - Bloodworth, I. J.
AU - Bock, P.
AU - Breuker, H.
AU - Brown, R. M.
AU - Brun, R.
AU - Buijs, A.
AU - Burckhart, H. J.
AU - Capiluppi, P.
AU - Carnegie, R. K.
AU - Carter, A. A.
AU - Carter, J. R.
AU - Chang, C. Y.
AU - Charlton, D. G.
AU - Chrin, J. T.M.
AU - Clarke, P. E.L.
AU - Cohen, I.
AU - Collins, W. J.
AU - Conboy, J. E.
AU - Couch, M.
AU - Coupland, M.
AU - Cuffiani, M.
AU - Dado, S.
AU - Dallavalle, G. M.
AU - Debu, P.
AU - Deninno, M. M.
AU - Dieckmann, A.
AU - Dittmar, M.
AU - Dixit, M. S.
AU - Duchovni, E.
AU - Duerdoth, I. P.
AU - Duerdoth, I. P.
AU - Dumas, D.
AU - El Mamouni, H.
AU - Elcombe, P. A.
AU - Estabrooks, P. G.
AU - Etzion, E.
AU - Fabbri, F.
AU - Farthouat, P.
AU - Fischer, H. M.
AU - Fong, D. G.
AU - French, M. T.
AU - Fukunaga, C.
AU - Gaidot, A.
AU - Ganel, O.
AU - Gary, J. W.
AU - Gascon, J.
AU - Geddes, N. I.
AU - Gee, C. N.P.
AU - Geich-Gimbel, C.
AU - Gensler, S. W.
AU - Gentit, F. X.
AU - Giacomelli, G.
AU - Gibson, V.
AU - Gibson, W. R.
AU - Gillies, J. D.
AU - Goldberg, J.
AU - Goodrick, M. J.
AU - Gorn, W.
AU - Granite, D.
AU - Gross, E.
AU - Grunhaus, J.
AU - Hagedorn, H.
AU - Hagemann, J.
AU - Hansroul, M.
AU - Hargrove, C. K.
AU - Hart, J.
AU - Hattersley, P. M.
AU - Hauschild, M.
AU - Hawkes, C. M.
AU - Heflin, E.
AU - Hemingway, R. J.
AU - Heuer, R. D.
AU - Hill, J. C.
AU - Hillier, S. J.
AU - Ho, C.
AU - Hobbs, J. D.
AU - Hobson, P. R.
AU - Hochman, D.
AU - Holl, B.
AU - Homer, R. J.
AU - Hou, S. R.
AU - Howarth, C. P.
AU - Humbert, R.
AU - Hughes-Jones, R. E.
AU - Igo-Kemenes, P.
AU - Ihssen, H.
AU - Imrie, D. C.
AU - Jawahery, A.
AU - Jeffreys, P. W.
AU - Jeremie, H.
AU - Jimack, M.
AU - Jobes, M.
AU - Jones, R. W.L.
AU - Jovanovic, P.
AU - Karlen, D.
AU - Kawagoe, K.
AU - Kawamoto, T.
AU - Kellogg, R. G.
AU - Kennedy, B. W.
AU - Kleinwort, C.
AU - Klem, D. E.
AU - Knop, G.
AU - Kobayashi, T.
AU - Kokott, T. P.
AU - Köpke, L.
AU - Kowalewski, R.
AU - Kreutzmann, H.
AU - von Krogh, J.
AU - Kroll, J.
AU - Kuwano, M.
AU - Kyberd, P.
AU - Lafferty, G. D.
AU - Lamarche, F.
AU - Larson, W. J.
AU - Layter, J. G.
AU - Le Du, P.
AU - Leblanc, P.
AU - Lee, A. M.
AU - Lehto, M. H.
AU - Lellouch, D.
AU - Lennert, P.
AU - Lessard, L.
AU - Levinson, L.
AU - Lloyd, S. L.
AU - Loebinger, F. K.
AU - Lorah, J. M.
AU - Lorazo, B.
AU - Losty, M. J.
AU - Ludwig, J.
AU - Lupu, N.
AU - Ma, J.
AU - Macbeth, A. A.
AU - Mannelli, M.
AU - Marcellini, S.
AU - Maringer, G.
AU - Martin, A. J.
AU - Martin, J. P.
AU - Mashimo, T.
AU - Mättig, P.
AU - Maur, U.
AU - McMahon, T. J.
AU - McNutt, J. R.
AU - McPherson, A. C.
AU - Meijers, F.
AU - Menszner, D.
AU - Merritt, F. S.
AU - Mes, H.
AU - Michelini, A.
AU - Middleton, R. P.
AU - Mikenberg, G.
AU - Miller, D. J.
AU - Milstene, C.
AU - Minowa, M.
AU - Mohr, W.
AU - Montanari, A.
AU - Mori, T.
AU - Moss, M. W.
AU - Murphy, P. G.
AU - Murray, W. J.
AU - Nellen, B.
AU - Nguyen, H. H.
AU - Nozaki, M.
AU - O'Dowd, A. J.P.
AU - O'Neale, S. W.
AU - O'Neill, B. P.
AU - Oakham, F. G.
AU - Odorici, F.
AU - Ogg, M.
AU - Oh, H.
AU - OregliaP, M. J.
AU - Orito, S.
AU - Pansart, J. P.
AU - Patrick, G. N.
AU - Pawley, S. J.
AU - Pfister, P.
AU - Pilcher, J. E.
AU - Pinfold, J. L.
AU - Plane, D. E.
AU - Poli, B.
AU - Pouladdej, A.
AU - Pritchard, T. W.
AU - Quast, G.
AU - Raab, J.
AU - Redmond, M. W.
AU - Rees, D. L.
AU - Regimbald, M.
AU - Riles, K.
AU - Roach, C. M.
AU - Robins, S. A.
AU - Rollnik, A.
AU - Roney, J. M.
AU - Rossberg, S.
AU - Rossi, A. M.
AU - Routenburg, P.
AU - Runge, K.
AU - Runolfsson, O.
AU - Sanghera, S.
AU - Sansum, R. A.
AU - Sasaki, M.
AU - Saunders, B. J.
AU - Schaile, A. D.
AU - Schaile, O.
AU - Schappert, W.
AU - Scharff-Hansen, P.
AU - von der Schmitt, H.
AU - Schreiber, S.
AU - Schwarz, J.
AU - Shapira, A.
AU - Shen, B. C.
AU - Sherwood, P.
AU - Simon, A.
AU - Singh, P.
AU - Siroli, G. P.
AU - Skuja, A.
AU - Smith, A. M.
AU - Smith, T. J.
AU - Snow, G. A.
AU - Spreadbury, E. J.
AU - Springer, R. W.
AU - Sproston, M.
AU - Stephens, K.
AU - Stier, H. E.
AU - Ströhmer, R.
AU - Strom, D.
AU - Takeda, H.
AU - Takeshita, T.
AU - Tsukamoto, T.
AU - Turner, M. F.
AU - Tysarczyk-Niemeyer, G.
AU - Van den plas, D.
AU - VanDalen, G. J.
AU - Vasseur, G.
AU - Virtue, C. J.
AU - Wagner, A.
AU - Wahl, C.
AU - Ward, C. P.
AU - Ward, D. R.
AU - Waterhouse, J.
AU - Watkins, P. M.
AU - Watson, A. T.
AU - Watson, N. K.
AU - Weber, M.
AU - Weisz, S.
AU - Wells, P. S.
AU - Wermes, N.
AU - Weymann, M.
AU - Wilson, G. W.
AU - Wilson, J. A.
AU - Wingerter, I.
AU - Winterer, V. H.
AU - Wood, N. C.
AU - Wotton, S.
AU - Wuensch, B.
AU - Wyatt, T. R.
AU - Yaari, R.
AU - Yang, Y.
AU - Yekutieli, G.
AU - Yoshida, T.
AU - Zeuner, W.
AU - Zorn, G. T.
N1 - Funding Information: we are pleased to acknowledge the following: the Bundesministerium ftir Forschung und Technologie, FRG, the Department of Energy, USA, the Institut de Recherche Fondamentale du Commissariat a I'E-nergie Atomique, the Israeli Ministry of Science, the Minerva Gesellschaft, the National Science Foundation, USA, the Natural Sciences and Engineering Research Council, Canada, the Japanese Ministry of Education, Science and Culture (the Monbusho) and a grant under the Monbusho International Science Research Program, the American Israeli Bi-national Science Foundation, the Science and Engineering Research Council, UK and the A.P. Sloan Foundation.
PY - 1990/9/13
Y1 - 1990/9/13
N2 - The couplings of the Z0 to charged leptons are studied using measurements of the lepton pair cross sections and forward-backward asymmetries at centre of mass energies near to the mass of the Z0. The data are consistent with lepton universality. Using a parametrisation of the lepton pair differential cross section which assumes that the Z0 has only vector and axial couplings to leptons, the charged leptonic partial decay width of the Z0 is determined to be G{cyrillic}ol+ol- = 83.1±1.9 MeV and the square of the product of the effective axial vector and vector coupling constants of the Z0 to charged leptons to be a ̌2 ol v ̌2 ol = 0.0039± 0.0083, in agreement with the standard model. A parametrisation in the form of the improved Born approximation gives effective leptonic axial vector and vector coupling constants a ̌2 ol = 0.998±0.024 and v ̌2 ol = 0.0044±0.0083. In the framework of the standard model, the values of the parameters ρ{variant}z and sin2θw are found to be 0.998±0.024 and 0.233+0.045 -0.012 respectively. Using the relationship in the minimal standard model between ρ{variant}z and sin2θw, the results sin2θSM w = 0.233+0.007 -0.006 is obtained. Our previously published measurement of the ratio of the hadronic to the leptonic partial width of the Z0 is update: Rz = 21.72+0.71 -0.65.
AB - The couplings of the Z0 to charged leptons are studied using measurements of the lepton pair cross sections and forward-backward asymmetries at centre of mass energies near to the mass of the Z0. The data are consistent with lepton universality. Using a parametrisation of the lepton pair differential cross section which assumes that the Z0 has only vector and axial couplings to leptons, the charged leptonic partial decay width of the Z0 is determined to be G{cyrillic}ol+ol- = 83.1±1.9 MeV and the square of the product of the effective axial vector and vector coupling constants of the Z0 to charged leptons to be a ̌2 ol v ̌2 ol = 0.0039± 0.0083, in agreement with the standard model. A parametrisation in the form of the improved Born approximation gives effective leptonic axial vector and vector coupling constants a ̌2 ol = 0.998±0.024 and v ̌2 ol = 0.0044±0.0083. In the framework of the standard model, the values of the parameters ρ{variant}z and sin2θw are found to be 0.998±0.024 and 0.233+0.045 -0.012 respectively. Using the relationship in the minimal standard model between ρ{variant}z and sin2θw, the results sin2θSM w = 0.233+0.007 -0.006 is obtained. Our previously published measurement of the ratio of the hadronic to the leptonic partial width of the Z0 is update: Rz = 21.72+0.71 -0.65.
UR - http://www.scopus.com/inward/record.url?scp=0010826650&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0010826650&partnerID=8YFLogxK
U2 - 10.1016/0370-2693(90)90925-V
DO - 10.1016/0370-2693(90)90925-V
M3 - Article
AN - SCOPUS:0010826650
SN - 0370-2693
VL - 247
SP - 458
EP - 472
JO - Physics Letters B
JF - Physics Letters B
IS - 2-3
ER -