Updated measurement of the τ lifetime

R. Akers, G. Alexander, J. Allison, K. J. Anderson, S. Arcelli, S. Asai, A. Astbury, D. Axen, G. Azuelos, A. H. Ball, E. Barberio, R. J. Barlow, R. Bartoldus, J. R. Batley, G. Beaudoin, A. Beck, G. A. Beck, J. Becker, C. Beeston, T. BehnkeK. W. Bell, G. Bella, P. Bentkowski, S. Bentvelsen, P. Berlich, S. Bethke, O. Biebel, I. J. Bloodworth, P. Bock, H. M. Bosch, M. Boutemeur, S. Braibant, P. Bright-Thomas, R. M. Brown, A. Buijs, H. J. Burckhart, C. Burgard, P. Capiluppi, R. K. Carnegie, A. A. Carter, J. R. Carter, C. Y. Chang, C. Charlesworth, D. G. Charlton, S. L. Chu, P. E.L. Clarke, J. C. Clayton, S. G. Clowes, I. Cohen, J. E. Conboy, M. Coupland, M. Cuffiani, S. Dado, C. Dallapiccolla, G. M. Dallavalle, C. Darling, S. De Jong, H. Deng, M. Dittmar, M. S. Dixit, E. do Couto e Silva, J. E. Duboscq, E. Duchovni, G. Duckeck, I. P. Duerdoth, U. C. Dunwoody, P. A. Elcombe, P. G. Estabrooks, E. Etzion, H. G. Evans, F. Fabbri, B. Fabbro, M. Fanti, M. Fierro, M. Fincke-Keeler, H. M. Fischer, P. Fischer, R. Folman, D. G. Fong, M. Foucher, H. Fukui, A. Fürtjes, P. Gagnon, A. Gaidot, J. W. Gary, J. Gascon, N. I. Geddes, C. Geich-Gimbel, S. W. Gensler, F. X. Gentit, T. Geralis, G. Giacomelli, P. Giacomelli, R. Giacomelli, V. Gibson, W. R. Gibson, J. D. Gillies, J. Goldberg, D. M. Gingrich, M. J. Goodrick, W. Gorn, C. Grandi, P. Grannis, E. Gross, J. Hagemann, G. G. Hanson, M. Hansroul, C. K. Hargrove, J. Hart, P. A. Hart, M. Hauschild, C. M. Hawkes, E. Heflin, R. J. Hemingway, G. Herten, R. D. Heuer, J. C. Hill, S. J. Hillier, T. Hilse, D. A. Hinshaw, P. R. Hobson, D. Hochman, A. Höcker, R. J. Homer, A. K. Honma, R. E. Hughes-Jones, R. Humbert, P. Igo-Kemenes, H. Ihssen, D. C. Imrie, A. Jawahery, P. W. Jeffreys, H. Jeremie, M. Jimack, M. Jones, R. W.L. Jones, P. Jovanovic, C. Jui, D. Karlen, K. Kawagoe, T. Kawamoto, R. K. Keeler, R. G. Kellogg, B. W. Kennedy, B. King, J. King, S. Kluth, T. Kobayashi, M. Kobel, D. S. Koetke, T. P. Kokott, Sachio Komamiya, R. Kowalewski, R. Howard, P. Krieger, J. von Krogh, P. Kyberd, G. D. Lafferty, H. Lafoux, R. Lahmann, J. Lauber, J. G. Layter, P. Leblanc, P. Le Du, A. M. Lee, E. Lefebvre, M. H. Lehto, D. Lellouch, C. Leroy, J. Letts, L. Levinson, Z. Li, F. Liu, S. L. Lloyd, F. K. Loebinger, G. D. Long, B. Lorazo, M. J. Losty, X. C. Lou, J. Ludwig, A. Luig, M. Mannelli, S. Marcellini, C. Markus, A. J. Martin, J. P. Martin, T. Mashimo, P. Mättig, U. Maur, J. McKenna, T. J. McMahon, A. I. McNab, J. R. McNutt, F. Meijers, F. S. Merritt, H. Mes, A. Michelini, R. P. Middleton, G. Mikenberg, J. Mildenberger, D. J. Miller, R. Mir, W. Mohr, C. Moisan, A. Montanari, T. Mori, M. Morii, U. Müller, B. Nellen, B. Nijjhar, S. W. O'Neale, F. G. Oakham, F. Odorici, H. O. Ogren, C. J. Oram, M. J. Oreglia, S. Orito, J. P. Pansart, G. N. Patrick, M. J. Pearce, P. Pfister, P. D. Phillips, J. E. Pilcher, J. Pinfold, D. Pitman, D. E. Plane, P. Poffenberger, B. Poli, A. Posthaus, T. W. Pritchard, H. Przysiezniak, M. W. Redmond, D. L. Rees, D. Rigby, M. Rison, S. A. Robins, D. Robinson, J. M. Roney, E. Ros, S. Rossberg, A. M. Rossi, M. Rosvick, P. Routenburg, Y. Rozen, K. Runge, O. Runolfsson, D. R. Rust, M. Sasaki, C. Sbarra, A. D. Schaile, O. Schaile, F. Scharf, P. Scharff-Hansen, P. Schenk, B. Schmitt, H. von der Schmitt, M. Schröder, H. C. Schultz-Coulon, P. Schütz, M. Schulz, C. Schwick, J. Schwiening, W. G. Scott, M. Settles, T. G. Shears, B. C. Shen, C. H. Shepherd-Themistocleous, P. Sherwood, G. P. Siroli, A. Skillman, A. Skuja, A. M. Smith, T. J. Smith, G. A. Snow, R. Sobie, R. W. Springer, M. Sproston, A. Stahl, C. Stegmann, K. Stephens, J. Steuerer, B. Stockhausen, R. Ströhmer, D. Strom, P. Szymanski, H. Takeda, T. Takeshita, S. Tarem, M. Tecchio, P. Teixeira-Dias, N. Tesch, M. A. Thomson, S. Towers, T. Tsukamoto, M. F. Turner-Watson, D. Van den plas, R. Van Kooten, G. Vasseur, M. Vincter, A. Wagner, D. L. Wagner, C. P. Ward, D. R. Ward, J. J. Ward, P. M. Watkins, A. T. Watson, N. K. Watson, P. Weber, P. S. Wells, N. Wermes, B. Wilkens, G. W. Wilson, J. A. Wilson, V. H. Winterer, T. Wlodek, G. Wolf, S. Wotton, T. R. Wyatt, A. Yeaman, G. Yekutieli, M. Yurko, W. Zeuner, G. T. Zorn

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

We present an update of our measurement of the τ lepton lifetime, using data taken during 1992 and 1993 with the OPAL detector at LEP. The lifetime is determined from analyses of the impact parameters of tracks from τ decays to a single charged particle, and the reconstructed decay lenghts from the τ decays to three charged particles. With the added statistics (which increase the τ pair event sample size by more than a factor of four over our 1990 and 1991 data sample), the updated lifetime measurement is: ττ = 288.8 ± 2.2 (stat) ± 1.4 (sys) fs. When combined with world-average measurements of the tau leptonic branching fractions (assuming e-μ universality), the ratio of charged-current couplings is: ( gτ gμ) = 1.005 ± 0.007, in agreement with the hypothesis of τ-μ charged-current universality.

Original languageEnglish
Pages (from-to)497-506
Number of pages10
JournalPhysics Letters B
Volume338
Issue number4
DOIs
Publication statusPublished - 1994 Nov 3
Externally publishedYes

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life (durability)
charged particles
decay
leptons
statistics
detectors

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Akers, R., Alexander, G., Allison, J., Anderson, K. J., Arcelli, S., Asai, S., ... Zorn, G. T. (1994). Updated measurement of the τ lifetime. Physics Letters B, 338(4), 497-506. https://doi.org/10.1016/0370-2693(94)90805-2

Updated measurement of the τ lifetime. / Akers, R.; Alexander, G.; Allison, J.; Anderson, K. J.; Arcelli, S.; Asai, S.; Astbury, A.; Axen, D.; Azuelos, G.; Ball, A. H.; Barberio, E.; Barlow, R. J.; Bartoldus, R.; Batley, J. R.; Beaudoin, G.; Beck, A.; Beck, G. A.; Becker, J.; Beeston, C.; Behnke, T.; Bell, K. W.; Bella, G.; Bentkowski, P.; 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.; Burgard, C.; 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.; Coupland, M.; Cuffiani, M.; Dado, S.; Dallapiccolla, C.; Dallavalle, G. M.; Darling, C.; De Jong, S.; 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.; Elcombe, P. A.; Estabrooks, P. G.; Etzion, E.; Evans, H. G.; Fabbri, F.; Fabbro, B.; Fanti, M.; 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.; Grannis, P.; Gross, E.; Hagemann, J.; Hanson, G. G.; Hansroul, M.; Hargrove, C. K.; Hart, J.; 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.; Hinshaw, D. A.; Hobson, P. R.; Hochman, D.; Höcker, A.; Homer, R. J.; Honma, A. K.; Hughes-Jones, R. E.; Humbert, R.; Igo-Kemenes, P.; Ihssen, H.; Imrie, D. C.; Jawahery, A.; Jeffreys, P. W.; Jeremie, H.; Jimack, M.; Jones, M.; Jones, R. W.L.; Jovanovic, P.; Jui, C.; Karlen, D.; Kawagoe, K.; Kawamoto, T.; Keeler, R. K.; Kellogg, R. G.; Kennedy, B. W.; King, B.; King, J.; Kluth, S.; Kobayashi, T.; Kobel, M.; Koetke, D. S.; Kokott, T. P.; Komamiya, Sachio; Kowalewski, R.; Howard, R.; Krieger, P.; von Krogh, J.; Kyberd, P.; Lafferty, G. D.; Lafoux, H.; Lahmann, R.; Lauber, J.; Layter, J. G.; Leblanc, P.; Le Du, P.; Lee, A. M.; Lefebvre, E.; Lehto, M. H.; Lellouch, D.; Leroy, C.; Letts, J.; Levinson, L.; Li, Z.; Liu, F.; 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.; Mättig, P.; Maur, U.; McKenna, J.; McMahon, T. J.; McNab, A. I.; McNutt, J. R.; Meijers, F.; Merritt, F. S.; Mes, H.; Michelini, A.; Middleton, R. P.; Mikenberg, G.; Mildenberger, J.; Miller, D. J.; Mir, R.; Mohr, W.; Moisan, C.; Montanari, A.; Mori, T.; Morii, M.; Müller, U.; Nellen, B.; Nijjhar, B.; O'Neale, S. W.; Oakham, F. G.; Odorici, F.; Ogren, H. O.; Oram, C. J.; Oreglia, M. J.; Orito, S.; Pansart, J. P.; Patrick, G. N.; Pearce, M. J.; Pfister, P.; Phillips, P. D.; Pilcher, J. E.; Pinfold, J.; Pitman, D.; Plane, D. E.; Poffenberger, P.; Poli, B.; Posthaus, A.; Pritchard, T. W.; Przysiezniak, H.; Redmond, M. W.; Rees, D. L.; Rigby, D.; Rison, M.; Robins, S. A.; Robinson, D.; Roney, J. M.; Ros, E.; Rossberg, S.; 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.; von der Schmitt, H.; 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.; Springer, R. W.; Sproston, M.; Stahl, A.; Stegmann, C.; Stephens, K.; Steuerer, J.; Stockhausen, B.; Ströhmer, R.; Strom, D.; Szymanski, P.; Takeda, H.; Takeshita, T.; Tarem, S.; Tecchio, M.; Teixeira-Dias, P.; Tesch, N.; Thomson, M. A.; Towers, S.; Tsukamoto, T.; Turner-Watson, M. F.; Van den plas, D.; Van Kooten, R.; Vasseur, G.; 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.; Zeuner, W.; Zorn, G. T.

In: Physics Letters B, Vol. 338, No. 4, 03.11.1994, p. 497-506.

Research output: Contribution to journalArticle

Akers, R, Alexander, G, Allison, J, Anderson, KJ, Arcelli, S, Asai, S, Astbury, A, Axen, D, Azuelos, G, Ball, AH, Barberio, E, Barlow, RJ, Bartoldus, R, Batley, JR, Beaudoin, G, Beck, A, Beck, GA, Becker, J, Beeston, C, Behnke, T, Bell, KW, Bella, G, Bentkowski, P, Bentvelsen, S, Berlich, P, Bethke, S, Biebel, O, Bloodworth, IJ, Bock, P, Bosch, HM, Boutemeur, M, Braibant, S, Bright-Thomas, P, Brown, RM, Buijs, A, Burckhart, HJ, Burgard, C, Capiluppi, P, Carnegie, RK, Carter, AA, Carter, JR, Chang, CY, Charlesworth, C, Charlton, DG, Chu, SL, Clarke, PEL, Clayton, JC, Clowes, SG, Cohen, I, Conboy, JE, Coupland, M, Cuffiani, M, Dado, S, Dallapiccolla, C, Dallavalle, GM, Darling, C, De Jong, S, Deng, H, Dittmar, M, Dixit, MS, do Couto e Silva, E, Duboscq, JE, Duchovni, E, Duckeck, G, Duerdoth, IP, Dunwoody, UC, Elcombe, PA, Estabrooks, PG, Etzion, E, Evans, HG, Fabbri, F, Fabbro, B, Fanti, M, Fierro, M, Fincke-Keeler, M, Fischer, HM, Fischer, P, Folman, R, Fong, DG, Foucher, M, Fukui, H, Fürtjes, A, Gagnon, P, Gaidot, A, Gary, JW, Gascon, J, Geddes, NI, Geich-Gimbel, C, Gensler, SW, Gentit, FX, Geralis, T, Giacomelli, G, Giacomelli, P, Giacomelli, R, Gibson, V, Gibson, WR, Gillies, JD, Goldberg, J, Gingrich, DM, Goodrick, MJ, Gorn, W, Grandi, C, Grannis, P, Gross, E, Hagemann, J, Hanson, GG, Hansroul, M, Hargrove, CK, Hart, J, Hart, PA, Hauschild, M, Hawkes, CM, Heflin, E, Hemingway, RJ, Herten, G, Heuer, RD, Hill, JC, Hillier, SJ, Hilse, T, Hinshaw, DA, Hobson, PR, Hochman, D, Höcker, A, Homer, RJ, Honma, AK, Hughes-Jones, RE, Humbert, R, Igo-Kemenes, P, Ihssen, H, Imrie, DC, Jawahery, A, Jeffreys, PW, Jeremie, H, Jimack, M, Jones, M, Jones, RWL, Jovanovic, P, Jui, C, Karlen, D, Kawagoe, K, Kawamoto, T, Keeler, RK, Kellogg, RG, Kennedy, BW, King, B, King, J, Kluth, S, Kobayashi, T, Kobel, M, Koetke, DS, Kokott, TP, Komamiya, S, Kowalewski, R, Howard, R, Krieger, P, von Krogh, J, Kyberd, P, Lafferty, GD, Lafoux, H, Lahmann, R, Lauber, J, Layter, JG, Leblanc, P, Le Du, P, Lee, AM, Lefebvre, E, Lehto, MH, Lellouch, D, Leroy, C, Letts, J, Levinson, L, Li, Z, Liu, F, Lloyd, SL, Loebinger, FK, Long, GD, Lorazo, B, Losty, MJ, Lou, XC, Ludwig, J, Luig, A, Mannelli, M, Marcellini, S, Markus, C, Martin, AJ, Martin, JP, Mashimo, T, Mättig, P, Maur, U, McKenna, J, McMahon, TJ, McNab, AI, McNutt, JR, Meijers, F, Merritt, FS, Mes, H, Michelini, A, Middleton, RP, Mikenberg, G, Mildenberger, J, Miller, DJ, Mir, R, Mohr, W, Moisan, C, Montanari, A, Mori, T, Morii, M, Müller, U, Nellen, B, Nijjhar, B, O'Neale, SW, Oakham, FG, Odorici, F, Ogren, HO, Oram, CJ, Oreglia, MJ, Orito, S, Pansart, JP, Patrick, GN, Pearce, MJ, Pfister, P, Phillips, PD, Pilcher, JE, Pinfold, J, Pitman, D, Plane, DE, Poffenberger, P, Poli, B, Posthaus, A, Pritchard, TW, Przysiezniak, H, Redmond, MW, Rees, DL, Rigby, D, Rison, M, Robins, SA, Robinson, D, Roney, JM, Ros, E, Rossberg, S, Rossi, AM, Rosvick, M, Routenburg, P, Rozen, Y, Runge, K, Runolfsson, O, Rust, DR, Sasaki, M, Sbarra, C, Schaile, AD, Schaile, O, Scharf, F, Scharff-Hansen, P, Schenk, P, Schmitt, B, von der Schmitt, H, Schröder, M, Schultz-Coulon, HC, Schütz, P, Schulz, M, Schwick, C, Schwiening, J, Scott, WG, Settles, M, Shears, TG, Shen, BC, Shepherd-Themistocleous, CH, Sherwood, P, Siroli, GP, Skillman, A, Skuja, A, Smith, AM, Smith, TJ, Snow, GA, Sobie, R, Springer, RW, Sproston, M, Stahl, A, Stegmann, C, Stephens, K, Steuerer, J, Stockhausen, B, Ströhmer, R, Strom, D, Szymanski, P, Takeda, H, Takeshita, T, Tarem, S, Tecchio, M, Teixeira-Dias, P, Tesch, N, Thomson, MA, Towers, S, Tsukamoto, T, Turner-Watson, MF, Van den plas, D, Van Kooten, R, Vasseur, G, Vincter, M, Wagner, A, Wagner, DL, Ward, CP, Ward, DR, Ward, JJ, Watkins, PM, Watson, AT, Watson, NK, Weber, P, Wells, PS, Wermes, N, Wilkens, B, Wilson, GW, Wilson, JA, Winterer, VH, Wlodek, T, Wolf, G, Wotton, S, Wyatt, TR, Yeaman, A, Yekutieli, G, Yurko, M, Zeuner, W & Zorn, GT 1994, 'Updated measurement of the τ lifetime', Physics Letters B, vol. 338, no. 4, pp. 497-506. https://doi.org/10.1016/0370-2693(94)90805-2
Akers R, Alexander G, Allison J, Anderson KJ, Arcelli S, Asai S et al. Updated measurement of the τ lifetime. Physics Letters B. 1994 Nov 3;338(4):497-506. https://doi.org/10.1016/0370-2693(94)90805-2
Akers, R. ; Alexander, G. ; Allison, J. ; Anderson, K. J. ; Arcelli, S. ; Asai, S. ; Astbury, A. ; Axen, D. ; Azuelos, G. ; Ball, A. H. ; Barberio, E. ; Barlow, R. J. ; Bartoldus, R. ; Batley, J. R. ; Beaudoin, G. ; Beck, A. ; Beck, G. A. ; Becker, J. ; Beeston, C. ; Behnke, T. ; Bell, K. W. ; Bella, G. ; Bentkowski, P. ; 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. ; Burgard, C. ; 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. ; Coupland, M. ; Cuffiani, M. ; Dado, S. ; Dallapiccolla, C. ; Dallavalle, G. M. ; Darling, C. ; De Jong, S. ; 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. ; Elcombe, P. A. ; Estabrooks, P. G. ; Etzion, E. ; Evans, H. G. ; Fabbri, F. ; Fabbro, B. ; Fanti, M. ; 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. ; Grannis, P. ; Gross, E. ; Hagemann, J. ; Hanson, G. G. ; Hansroul, M. ; Hargrove, C. K. ; Hart, J. ; 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. ; Hinshaw, D. A. ; Hobson, P. R. ; Hochman, D. ; Höcker, A. ; Homer, R. J. ; Honma, A. K. ; Hughes-Jones, R. E. ; Humbert, R. ; Igo-Kemenes, P. ; Ihssen, H. ; Imrie, D. C. ; Jawahery, A. ; Jeffreys, P. W. ; Jeremie, H. ; Jimack, M. ; Jones, M. ; Jones, R. W.L. ; Jovanovic, P. ; Jui, C. ; Karlen, D. ; Kawagoe, K. ; Kawamoto, T. ; Keeler, R. K. ; Kellogg, R. G. ; Kennedy, B. W. ; King, B. ; King, J. ; Kluth, S. ; Kobayashi, T. ; Kobel, M. ; Koetke, D. S. ; Kokott, T. P. ; Komamiya, Sachio ; Kowalewski, R. ; Howard, R. ; Krieger, P. ; von Krogh, J. ; Kyberd, P. ; Lafferty, G. D. ; Lafoux, H. ; Lahmann, R. ; Lauber, J. ; Layter, J. G. ; Leblanc, P. ; Le Du, P. ; Lee, A. M. ; Lefebvre, E. ; Lehto, M. H. ; Lellouch, D. ; Leroy, C. ; Letts, J. ; Levinson, L. ; Li, Z. ; Liu, F. ; 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. ; Mättig, P. ; Maur, U. ; McKenna, J. ; McMahon, T. J. ; McNab, A. I. ; McNutt, J. R. ; Meijers, F. ; Merritt, F. S. ; Mes, H. ; Michelini, A. ; Middleton, R. P. ; Mikenberg, G. ; Mildenberger, J. ; Miller, D. J. ; Mir, R. ; Mohr, W. ; Moisan, C. ; Montanari, A. ; Mori, T. ; Morii, M. ; Müller, U. ; Nellen, B. ; Nijjhar, B. ; O'Neale, S. W. ; Oakham, F. G. ; Odorici, F. ; Ogren, H. O. ; Oram, C. J. ; Oreglia, M. J. ; Orito, S. ; Pansart, J. P. ; Patrick, G. N. ; Pearce, M. J. ; Pfister, P. ; Phillips, P. D. ; Pilcher, J. E. ; Pinfold, J. ; Pitman, D. ; Plane, D. E. ; Poffenberger, P. ; Poli, B. ; Posthaus, A. ; Pritchard, T. W. ; Przysiezniak, H. ; Redmond, M. W. ; Rees, D. L. ; Rigby, D. ; Rison, M. ; Robins, S. A. ; Robinson, D. ; Roney, J. M. ; Ros, E. ; Rossberg, S. ; 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. ; von der Schmitt, H. ; 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. ; Springer, R. W. ; Sproston, M. ; Stahl, A. ; Stegmann, C. ; Stephens, K. ; Steuerer, J. ; Stockhausen, B. ; Ströhmer, R. ; Strom, D. ; Szymanski, P. ; Takeda, H. ; Takeshita, T. ; Tarem, S. ; Tecchio, M. ; Teixeira-Dias, P. ; Tesch, N. ; Thomson, M. A. ; Towers, S. ; Tsukamoto, T. ; Turner-Watson, M. F. ; Van den plas, D. ; Van Kooten, R. ; Vasseur, G. ; 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. ; Zeuner, W. ; Zorn, G. T. / Updated measurement of the τ lifetime. In: Physics Letters B. 1994 ; Vol. 338, No. 4. pp. 497-506.
@article{057885177ee440099773a3ecdb3982df,
title = "Updated measurement of the τ lifetime",
abstract = "We present an update of our measurement of the τ lepton lifetime, using data taken during 1992 and 1993 with the OPAL detector at LEP. The lifetime is determined from analyses of the impact parameters of tracks from τ decays to a single charged particle, and the reconstructed decay lenghts from the τ decays to three charged particles. With the added statistics (which increase the τ pair event sample size by more than a factor of four over our 1990 and 1991 data sample), the updated lifetime measurement is: ττ = 288.8 ± 2.2 (stat) ± 1.4 (sys) fs. When combined with world-average measurements of the tau leptonic branching fractions (assuming e-μ universality), the ratio of charged-current couplings is: ( gτ gμ) = 1.005 ± 0.007, in agreement with the hypothesis of τ-μ charged-current universality.",
author = "R. Akers and G. Alexander and J. Allison and Anderson, {K. J.} and S. Arcelli and S. Asai and A. Astbury and D. Axen and G. Azuelos and Ball, {A. H.} and E. Barberio and Barlow, {R. J.} and R. Bartoldus and Batley, {J. R.} and G. Beaudoin and A. Beck and Beck, {G. A.} and J. Becker and C. Beeston and T. Behnke and Bell, {K. W.} and G. Bella and P. Bentkowski and S. Bentvelsen and P. Berlich and S. Bethke and O. Biebel and Bloodworth, {I. J.} and P. Bock and Bosch, {H. M.} and M. Boutemeur and S. Braibant and P. Bright-Thomas and Brown, {R. M.} and A. Buijs and Burckhart, {H. J.} and C. Burgard and P. Capiluppi and Carnegie, {R. K.} and Carter, {A. A.} and Carter, {J. R.} and Chang, {C. Y.} and C. Charlesworth and Charlton, {D. G.} and Chu, {S. L.} and Clarke, {P. E.L.} and Clayton, {J. C.} and Clowes, {S. G.} and I. Cohen and Conboy, {J. E.} and M. Coupland and M. Cuffiani and S. Dado and C. Dallapiccolla and Dallavalle, {G. M.} and C. Darling and {De Jong}, S. and H. Deng and M. Dittmar and Dixit, {M. S.} and {do Couto e Silva}, E. and Duboscq, {J. E.} and E. Duchovni and G. Duckeck and Duerdoth, {I. P.} and Dunwoody, {U. C.} and Elcombe, {P. A.} and Estabrooks, {P. G.} and E. Etzion and Evans, {H. G.} and F. Fabbri and B. Fabbro and M. Fanti and M. Fierro and M. Fincke-Keeler and Fischer, {H. M.} and P. Fischer and R. Folman and Fong, {D. G.} and M. Foucher and H. Fukui and A. F{\"u}rtjes and P. Gagnon and A. Gaidot and Gary, {J. W.} and J. Gascon and Geddes, {N. I.} and C. Geich-Gimbel and Gensler, {S. W.} and Gentit, {F. X.} and T. Geralis and G. Giacomelli and P. Giacomelli and R. Giacomelli and V. Gibson and Gibson, {W. R.} and Gillies, {J. D.} and J. Goldberg and Gingrich, {D. M.} and Goodrick, {M. J.} and W. Gorn and C. Grandi and P. Grannis and E. Gross and J. Hagemann and Hanson, {G. G.} and M. Hansroul and Hargrove, {C. K.} and J. Hart and Hart, {P. A.} and M. Hauschild and Hawkes, {C. M.} and E. Heflin and Hemingway, {R. J.} and G. Herten and Heuer, {R. D.} and Hill, {J. C.} and Hillier, {S. J.} and T. Hilse and Hinshaw, {D. A.} and Hobson, {P. R.} and D. Hochman and A. H{\"o}cker and Homer, {R. J.} and Honma, {A. K.} and Hughes-Jones, {R. E.} and R. Humbert and P. Igo-Kemenes and H. Ihssen and Imrie, {D. C.} and A. Jawahery and Jeffreys, {P. W.} and H. Jeremie and M. Jimack and M. Jones and Jones, {R. W.L.} and P. Jovanovic and C. Jui and D. Karlen and K. Kawagoe and T. Kawamoto and Keeler, {R. K.} and Kellogg, {R. G.} and Kennedy, {B. W.} and B. King and J. King and S. Kluth and T. Kobayashi and M. Kobel and Koetke, {D. S.} and Kokott, {T. P.} and Sachio Komamiya and R. Kowalewski and R. Howard and P. Krieger and {von Krogh}, J. and P. Kyberd and Lafferty, {G. D.} and H. Lafoux and R. Lahmann and J. Lauber and Layter, {J. G.} and P. Leblanc and {Le Du}, P. and Lee, {A. M.} and E. Lefebvre and Lehto, {M. H.} and D. Lellouch and C. Leroy and J. Letts and L. Levinson and Z. Li and F. Liu and Lloyd, {S. L.} and Loebinger, {F. K.} and Long, {G. D.} and B. Lorazo and Losty, {M. J.} and Lou, {X. C.} and J. Ludwig and A. Luig and M. Mannelli and S. Marcellini and C. Markus and Martin, {A. J.} and Martin, {J. P.} and T. Mashimo and P. M{\"a}ttig and U. Maur and J. McKenna and McMahon, {T. J.} and McNab, {A. I.} and McNutt, {J. R.} and F. Meijers and Merritt, {F. S.} and H. Mes and A. Michelini and Middleton, {R. P.} and G. Mikenberg and J. Mildenberger and Miller, {D. J.} and R. Mir and W. Mohr and C. Moisan and A. Montanari and T. Mori and M. Morii and U. M{\"u}ller and B. Nellen and B. Nijjhar and O'Neale, {S. W.} and Oakham, {F. G.} and F. Odorici and Ogren, {H. O.} and Oram, {C. J.} and Oreglia, {M. J.} and S. Orito and Pansart, {J. P.} and Patrick, {G. N.} and Pearce, {M. J.} and P. Pfister and Phillips, {P. D.} and Pilcher, {J. E.} and J. Pinfold and D. Pitman and Plane, {D. E.} and P. Poffenberger and B. Poli and A. Posthaus and Pritchard, {T. W.} and H. Przysiezniak and Redmond, {M. W.} and Rees, {D. L.} and D. Rigby and M. Rison and Robins, {S. A.} and D. Robinson and Roney, {J. M.} and E. Ros and S. Rossberg and Rossi, {A. M.} and M. Rosvick and P. Routenburg and Y. Rozen and K. Runge and O. Runolfsson and Rust, {D. R.} and M. Sasaki and C. Sbarra and Schaile, {A. D.} and O. Schaile and F. Scharf and P. Scharff-Hansen and P. Schenk and B. Schmitt and {von der Schmitt}, H. and M. Schr{\"o}der and Schultz-Coulon, {H. C.} and P. Sch{\"u}tz and M. Schulz and C. Schwick and J. Schwiening and Scott, {W. G.} and M. Settles and Shears, {T. G.} and Shen, {B. C.} and Shepherd-Themistocleous, {C. H.} and P. Sherwood and Siroli, {G. P.} and A. Skillman and A. Skuja and Smith, {A. M.} and Smith, {T. J.} and Snow, {G. A.} and R. Sobie and Springer, {R. W.} and M. Sproston and A. Stahl and C. Stegmann and K. Stephens and J. Steuerer and B. Stockhausen and R. Str{\"o}hmer and D. Strom and P. Szymanski and H. Takeda and T. Takeshita and S. Tarem and M. Tecchio and P. Teixeira-Dias and N. Tesch and Thomson, {M. A.} and S. Towers and T. Tsukamoto and Turner-Watson, {M. F.} and {Van den plas}, D. and {Van Kooten}, R. and G. Vasseur and M. Vincter and A. Wagner and Wagner, {D. L.} and Ward, {C. P.} and Ward, {D. R.} and Ward, {J. J.} and Watkins, {P. M.} and Watson, {A. T.} and Watson, {N. K.} and P. Weber and Wells, {P. S.} and N. Wermes and B. Wilkens and Wilson, {G. W.} and Wilson, {J. A.} and Winterer, {V. H.} and T. Wlodek and G. Wolf and S. Wotton and Wyatt, {T. R.} and A. Yeaman and G. Yekutieli and M. Yurko and W. Zeuner and Zorn, {G. T.}",
year = "1994",
month = "11",
day = "3",
doi = "10.1016/0370-2693(94)90805-2",
language = "English",
volume = "338",
pages = "497--506",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier",
number = "4",

}

TY - JOUR

T1 - Updated measurement of the τ lifetime

AU - Akers, R.

AU - Alexander, G.

AU - Allison, J.

AU - Anderson, K. J.

AU - Arcelli, S.

AU - Asai, S.

AU - Astbury, A.

AU - Axen, D.

AU - Azuelos, G.

AU - Ball, A. H.

AU - Barberio, E.

AU - Barlow, R. J.

AU - Bartoldus, R.

AU - Batley, J. R.

AU - Beaudoin, G.

AU - Beck, A.

AU - Beck, G. A.

AU - Becker, J.

AU - Beeston, C.

AU - Behnke, T.

AU - Bell, K. W.

AU - Bella, G.

AU - Bentkowski, P.

AU - Bentvelsen, S.

AU - Berlich, P.

AU - Bethke, S.

AU - Biebel, O.

AU - Bloodworth, I. J.

AU - Bock, P.

AU - Bosch, H. M.

AU - Boutemeur, M.

AU - Braibant, S.

AU - Bright-Thomas, P.

AU - Brown, R. M.

AU - Buijs, A.

AU - Burckhart, H. J.

AU - Burgard, C.

AU - Capiluppi, P.

AU - Carnegie, R. K.

AU - Carter, A. A.

AU - Carter, J. R.

AU - Chang, C. Y.

AU - Charlesworth, C.

AU - Charlton, D. G.

AU - Chu, S. L.

AU - Clarke, P. E.L.

AU - Clayton, J. C.

AU - Clowes, S. G.

AU - Cohen, I.

AU - Conboy, J. E.

AU - Coupland, M.

AU - Cuffiani, M.

AU - Dado, S.

AU - Dallapiccolla, C.

AU - Dallavalle, G. M.

AU - Darling, C.

AU - De Jong, S.

AU - Deng, H.

AU - Dittmar, M.

AU - Dixit, M. S.

AU - do Couto e Silva, E.

AU - Duboscq, J. E.

AU - Duchovni, E.

AU - Duckeck, G.

AU - Duerdoth, I. P.

AU - Dunwoody, U. C.

AU - Elcombe, P. A.

AU - Estabrooks, P. G.

AU - Etzion, E.

AU - Evans, H. G.

AU - Fabbri, F.

AU - Fabbro, B.

AU - Fanti, M.

AU - Fierro, M.

AU - Fincke-Keeler, M.

AU - Fischer, H. M.

AU - Fischer, P.

AU - Folman, R.

AU - Fong, D. G.

AU - Foucher, M.

AU - Fukui, H.

AU - Fürtjes, A.

AU - Gagnon, P.

AU - Gaidot, A.

AU - Gary, J. W.

AU - Gascon, J.

AU - Geddes, N. I.

AU - Geich-Gimbel, C.

AU - Gensler, S. W.

AU - Gentit, F. X.

AU - Geralis, T.

AU - Giacomelli, G.

AU - Giacomelli, P.

AU - Giacomelli, R.

AU - Gibson, V.

AU - Gibson, W. R.

AU - Gillies, J. D.

AU - Goldberg, J.

AU - Gingrich, D. M.

AU - Goodrick, M. J.

AU - Gorn, W.

AU - Grandi, C.

AU - Grannis, P.

AU - Gross, E.

AU - Hagemann, J.

AU - Hanson, G. G.

AU - Hansroul, M.

AU - Hargrove, C. K.

AU - Hart, J.

AU - Hart, P. A.

AU - Hauschild, M.

AU - Hawkes, C. M.

AU - Heflin, E.

AU - Hemingway, R. J.

AU - Herten, G.

AU - Heuer, R. D.

AU - Hill, J. C.

AU - Hillier, S. J.

AU - Hilse, T.

AU - Hinshaw, D. A.

AU - Hobson, P. R.

AU - Hochman, D.

AU - Höcker, A.

AU - Homer, R. J.

AU - Honma, A. K.

AU - Hughes-Jones, R. E.

AU - Humbert, R.

AU - Igo-Kemenes, P.

AU - Ihssen, H.

AU - Imrie, D. C.

AU - Jawahery, A.

AU - Jeffreys, P. W.

AU - Jeremie, H.

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PY - 1994/11/3

Y1 - 1994/11/3

N2 - We present an update of our measurement of the τ lepton lifetime, using data taken during 1992 and 1993 with the OPAL detector at LEP. The lifetime is determined from analyses of the impact parameters of tracks from τ decays to a single charged particle, and the reconstructed decay lenghts from the τ decays to three charged particles. With the added statistics (which increase the τ pair event sample size by more than a factor of four over our 1990 and 1991 data sample), the updated lifetime measurement is: ττ = 288.8 ± 2.2 (stat) ± 1.4 (sys) fs. When combined with world-average measurements of the tau leptonic branching fractions (assuming e-μ universality), the ratio of charged-current couplings is: ( gτ gμ) = 1.005 ± 0.007, in agreement with the hypothesis of τ-μ charged-current universality.

AB - We present an update of our measurement of the τ lepton lifetime, using data taken during 1992 and 1993 with the OPAL detector at LEP. The lifetime is determined from analyses of the impact parameters of tracks from τ decays to a single charged particle, and the reconstructed decay lenghts from the τ decays to three charged particles. With the added statistics (which increase the τ pair event sample size by more than a factor of four over our 1990 and 1991 data sample), the updated lifetime measurement is: ττ = 288.8 ± 2.2 (stat) ± 1.4 (sys) fs. When combined with world-average measurements of the tau leptonic branching fractions (assuming e-μ universality), the ratio of charged-current couplings is: ( gτ gμ) = 1.005 ± 0.007, in agreement with the hypothesis of τ-μ charged-current universality.

UR - http://www.scopus.com/inward/record.url?scp=0001752701&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001752701&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(94)90805-2

DO - 10.1016/0370-2693(94)90805-2

M3 - Article

AN - SCOPUS:0001752701

VL - 338

SP - 497

EP - 506

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 4

ER -