Determination of the τ lifetime in high energy e+e- annihilations

M. Althof; W. Braunschweig; F. J. Kirschfink; K. Lübelsmeyer; H. U. Martyn; J. Rimkus; P. Rosskamp; H. G. Sander; D. Schmitz; H. Siebke; W. Wallraff; H. M. Fischer; H. Hartmann; A. Jocksch; G. Knop; L. Köpke; H. Kolanoski; H. Kück; V. Mertens; R. Wedemeyer; M. Wollstadt; Y. Eisenberg; A. Eskreys; K. Gather; M. Hildebrandt; H. Hultschig; P. Joos; U. Kötz; H. Kowalski; A. Ladage; B. Löhr; D. Lüke; P. Mättig; D. Notz; R. J. Nowak; J. Pyrlik; M. Rushton; W. Schütte; D. Trines; T. Tymieniecka; G. Wolf; Ch Xiao; R. Fohrmann; E. Hilger; T. Kracht; H. L. Krasemann; P. Leu; E. Lohrmann; D. Pandoulas; G. Poelz; K. U. Pösnecker; B. H. Wiik; R. Beuselinck; D. M. Binnie; A. J. Campbell; P. Dornan; B. Foster; D. A. Garbutt; C. Jenkins; T. D. Jones; W. G. Jones; J. McCardle; J. K. Sedgbeer; J. Thomas; W. A.T. Wan Abdullah; K. W. Bell; M. G. Bowler; P. Bull; R. J. Cashmore; P. E.L. Clarke; R. Devenish; P. Grossmann; C. M. Hawkes; S. L. Lloyd; G. L. Salmon; C. Youngman; G. E. Forden; J. C. Hart; J. Harvey; D. K. Hasell; J. Proudfoot; D. H. Saxon; F. Barreiro; S. Brandt; M. Dittmar; M. Holder; G. Kreutz; B. Neumann; E. Duchovni; U. Karshon; G. Mikenberg; R. Mir; D. Revel; E. Ronat; A. Shapira; G. Yekutieli; G. Baranko; T. Barklow; A. Caldwell; M. Cherney; J. M. Izen; M. Mermikides; G. Rudolph; D. Strom; M. Takashima; H. Venkataramania; E. Wicklund; Sau Lan Wu; G. Zobernig

doi:10.1016/0370-2693(84)90214-4

Determination of the τ lifetime in high energy e⁺e^- annihilations

M. Althof, W. Braunschweig, F. J. Kirschfink, K. Lübelsmeyer, H. U. Martyn, J. Rimkus, P. Rosskamp, H. G. Sander, D. Schmitz, H. Siebke, W. Wallraff, H. M. Fischer, H. Hartmann, A. Jocksch, G. Knop, L. Köpke, H. Kolanoski, H. Kück, V. Mertens, R. WedemeyerM. Wollstadt, Y. Eisenberg, A. Eskreys, K. Gather, M. Hildebrandt, H. Hultschig, P. Joos, U. Kötz, H. Kowalski, A. Ladage, B. Löhr, D. Lüke, P. Mättig, D. Notz, R. J. Nowak, J. Pyrlik, M. Rushton, W. Schütte, D. Trines, T. Tymieniecka, G. Wolf, Ch Xiao, R. Fohrmann, E. Hilger, T. Kracht, H. L. Krasemann, P. Leu, E. Lohrmann, D. Pandoulas, G. Poelz, K. U. Pösnecker, B. H. Wiik, R. Beuselinck, D. M. Binnie, A. J. Campbell, P. Dornan, B. Foster, D. A. Garbutt, C. Jenkins, T. D. Jones, W. G. Jones, J. McCardle, J. K. Sedgbeer, J. Thomas, W. A.T. Wan Abdullah, K. W. Bell, M. G. Bowler, P. Bull, R. J. Cashmore, P. E.L. Clarke, R. Devenish, P. Grossmann, C. M. Hawkes, S. L. Lloyd, G. L. Salmon, C. Youngman, G. E. Forden, J. C. Hart, J. Harvey, D. K. Hasell, J. Proudfoot, D. H. Saxon, F. Barreiro, S. Brandt, M. Dittmar, M. Holder, G. Kreutz, B. Neumann, E. Duchovni, U. Karshon, G. Mikenberg, R. Mir, D. Revel, E. Ronat, A. Shapira, G. Yekutieli, G. Baranko, T. Barklow, A. Caldwell, M. Cherney, J. M. Izen, M. Mermikides, G. Rudolph, D. Strom, M. Takashima, H. Venkataramania, E. Wicklund, Sau Lan Wu, G. Zobernig

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

We have determined the τ lifetime in e⁺e^- annihilations at an average centre of mass energy of 42.5 GeV, using a pressurized drift chamber close to the interaction point. We find the lifetime to be (3.18_-0.75 ^+0.59 ± 0.56) × 10^-13 s. The charged weak τ coupling constant relative to that of the μ is found to be G_τ/G_μ = 0.94_-0.09 ^+0.12 ± 0.09, in good agreement lepton universality.

Original language	English (US)
Pages (from-to)	264-270
Number of pages	7
Journal	Physics Letters B
Volume	141
Issue number	3-4
DOIs	https://doi.org/10.1016/0370-2693(84)90214-4
State	Published - Jun 28 1984
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

Access to Document

10.1016/0370-2693(84)90214-4

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Althof, M., Braunschweig, W., Kirschfink, F. J., Lübelsmeyer, K., Martyn, H. U., Rimkus, J., Rosskamp, P., Sander, H. G., Schmitz, D., Siebke, H., Wallraff, W., Fischer, H. M., Hartmann, H., Jocksch, A., Knop, G., Köpke, L., Kolanoski, H., Kück, H., Mertens, V., ... Zobernig, G. (1984). Determination of the τ lifetime in high energy e⁺e^- annihilations. Physics Letters B, 141(3-4), 264-270. https://doi.org/10.1016/0370-2693(84)90214-4

Determination of the τ lifetime in high energy e⁺e^- annihilations. / Althof, M.; Braunschweig, W.; Kirschfink, F. J.; Lübelsmeyer, K.; Martyn, H. U.; Rimkus, J.; Rosskamp, P.; Sander, H. G.; Schmitz, D.; Siebke, H.; Wallraff, W.; Fischer, H. M.; Hartmann, H.; Jocksch, A.; Knop, G.; Köpke, L.; Kolanoski, H.; Kück, H.; Mertens, V.; Wedemeyer, R.; Wollstadt, M.; Eisenberg, Y.; Eskreys, A.; Gather, K.; Hildebrandt, M.; Hultschig, H.; Joos, P.; Kötz, U.; Kowalski, H.; Ladage, A.; Löhr, B.; Lüke, D.; Mättig, P.; Notz, D.; Nowak, R. J.; Pyrlik, J.; Rushton, M.; Schütte, W.; Trines, D.; Tymieniecka, T.; Wolf, G.; Xiao, Ch; Fohrmann, R.; Hilger, E.; Kracht, T.; Krasemann, H. L.; Leu, P.; Lohrmann, E.; Pandoulas, D.; Poelz, G.; Pösnecker, K. U.; Wiik, B. H.; Beuselinck, R.; Binnie, D. M.; Campbell, A. J.; Dornan, P.; Foster, B.; Garbutt, D. A.; Jenkins, C.; Jones, T. D.; Jones, W. G.; McCardle, J.; Sedgbeer, J. K.; Thomas, J.; Wan Abdullah, W. A.T.; Bell, K. W.; Bowler, M. G.; Bull, P.; Cashmore, R. J.; Clarke, P. E.L.; Devenish, R.; Grossmann, P.; Hawkes, C. M.; Lloyd, S. L.; Salmon, G. L.; Youngman, C.; Forden, G. E.; Hart, J. C.; Harvey, J.; Hasell, D. K.; Proudfoot, J.; Saxon, D. H.; Barreiro, F.; Brandt, S.; Dittmar, M.; Holder, M.; Kreutz, G.; Neumann, B.; Duchovni, E.; Karshon, U.; Mikenberg, G.; Mir, R.; Revel, D.; Ronat, E.; Shapira, A.; Yekutieli, G.; Baranko, G.; Barklow, T.; Caldwell, A.; Cherney, M.; Izen, J. M.; Mermikides, M.; Rudolph, G.; Strom, D.; Takashima, M.; Venkataramania, H.; Wicklund, E.; Lan Wu, Sau; Zobernig, G.

In: Physics Letters B, Vol. 141, No. 3-4, 28.06.1984, p. 264-270.

Research output: Contribution to journal › Article › peer-review

Althof, M, Braunschweig, W, Kirschfink, FJ, Lübelsmeyer, K, Martyn, HU, Rimkus, J, Rosskamp, P, Sander, HG, Schmitz, D, Siebke, H, Wallraff, W, Fischer, HM, Hartmann, H, Jocksch, A, Knop, G, Köpke, L, Kolanoski, H, Kück, H, Mertens, V, Wedemeyer, R, Wollstadt, M, Eisenberg, Y, Eskreys, A, Gather, K, Hildebrandt, M, Hultschig, H, Joos, P, Kötz, U, Kowalski, H, Ladage, A, Löhr, B, Lüke, D, Mättig, P, Notz, D, Nowak, RJ, Pyrlik, J, Rushton, M, Schütte, W, Trines, D, Tymieniecka, T, Wolf, G, Xiao, C, Fohrmann, R, Hilger, E, Kracht, T, Krasemann, HL, Leu, P, Lohrmann, E, Pandoulas, D, Poelz, G, Pösnecker, KU, Wiik, BH, Beuselinck, R, Binnie, DM, Campbell, AJ, Dornan, P, Foster, B, Garbutt, DA, Jenkins, C, Jones, TD, Jones, WG, McCardle, J, Sedgbeer, JK, Thomas, J, Wan Abdullah, WAT, Bell, KW, Bowler, MG, Bull, P, Cashmore, RJ, Clarke, PEL, Devenish, R, Grossmann, P, Hawkes, CM, Lloyd, SL, Salmon, GL, Youngman, C, Forden, GE, Hart, JC, Harvey, J, Hasell, DK, Proudfoot, J, Saxon, DH, Barreiro, F, Brandt, S, Dittmar, M, Holder, M, Kreutz, G, Neumann, B, Duchovni, E, Karshon, U, Mikenberg, G, Mir, R, Revel, D, Ronat, E, Shapira, A, Yekutieli, G, Baranko, G, Barklow, T, Caldwell, A, Cherney, M, Izen, JM, Mermikides, M, Rudolph, G, Strom, D, Takashima, M, Venkataramania, H, Wicklund, E, Lan Wu, S & Zobernig, G 1984, 'Determination of the τ lifetime in high energy e⁺e^- annihilations', Physics Letters B, vol. 141, no. 3-4, pp. 264-270. https://doi.org/10.1016/0370-2693(84)90214-4

Althof, M. ; Braunschweig, W. ; Kirschfink, F. J. ; Lübelsmeyer, K. ; Martyn, H. U. ; Rimkus, J. ; Rosskamp, P. ; Sander, H. G. ; Schmitz, D. ; Siebke, H. ; Wallraff, W. ; Fischer, H. M. ; Hartmann, H. ; Jocksch, A. ; Knop, G. ; Köpke, L. ; Kolanoski, H. ; Kück, H. ; Mertens, V. ; Wedemeyer, R. ; Wollstadt, M. ; Eisenberg, Y. ; Eskreys, A. ; Gather, K. ; Hildebrandt, M. ; Hultschig, H. ; Joos, P. ; Kötz, U. ; Kowalski, H. ; Ladage, A. ; Löhr, B. ; Lüke, D. ; Mättig, P. ; Notz, D. ; Nowak, R. J. ; Pyrlik, J. ; Rushton, M. ; Schütte, W. ; Trines, D. ; Tymieniecka, T. ; Wolf, G. ; Xiao, Ch ; Fohrmann, R. ; Hilger, E. ; Kracht, T. ; Krasemann, H. L. ; Leu, P. ; Lohrmann, E. ; Pandoulas, D. ; Poelz, G. ; Pösnecker, K. U. ; Wiik, B. H. ; Beuselinck, R. ; Binnie, D. M. ; Campbell, A. J. ; Dornan, P. ; Foster, B. ; Garbutt, D. A. ; Jenkins, C. ; Jones, T. D. ; Jones, W. G. ; McCardle, J. ; Sedgbeer, J. K. ; Thomas, J. ; Wan Abdullah, W. A.T. ; Bell, K. W. ; Bowler, M. G. ; Bull, P. ; Cashmore, R. J. ; Clarke, P. E.L. ; Devenish, R. ; Grossmann, P. ; Hawkes, C. M. ; Lloyd, S. L. ; Salmon, G. L. ; Youngman, C. ; Forden, G. E. ; Hart, J. C. ; Harvey, J. ; Hasell, D. K. ; Proudfoot, J. ; Saxon, D. H. ; Barreiro, F. ; Brandt, S. ; Dittmar, M. ; Holder, M. ; Kreutz, G. ; Neumann, B. ; Duchovni, E. ; Karshon, U. ; Mikenberg, G. ; Mir, R. ; Revel, D. ; Ronat, E. ; Shapira, A. ; Yekutieli, G. ; Baranko, G. ; Barklow, T. ; Caldwell, A. ; Cherney, M. ; Izen, J. M. ; Mermikides, M. ; Rudolph, G. ; Strom, D. ; Takashima, M. ; Venkataramania, H. ; Wicklund, E. ; Lan Wu, Sau ; Zobernig, G. / Determination of the τ lifetime in high energy e⁺e^- annihilations. In: Physics Letters B. 1984 ; Vol. 141, No. 3-4. pp. 264-270.

@article{085bc05bbe0b4b4b931735a8fc00a501,

title = "Determination of the τ lifetime in high energy e+e- annihilations",

abstract = "We have determined the τ lifetime in e+e- annihilations at an average centre of mass energy of 42.5 GeV, using a pressurized drift chamber close to the interaction point. We find the lifetime to be (3.18-0.75 +0.59 ± 0.56) × 10-13 s. The charged weak τ coupling constant relative to that of the μ is found to be Gτ/Gμ = 0.94-0.09 +0.12 ± 0.09, in good agreement lepton universality.",

author = "M. Althof and W. Braunschweig and Kirschfink, {F. J.} and K. L{\"u}belsmeyer and Martyn, {H. U.} and J. Rimkus and P. Rosskamp and Sander, {H. G.} and D. Schmitz and H. Siebke and W. Wallraff and Fischer, {H. M.} and H. Hartmann and A. Jocksch and G. Knop and L. K{\"o}pke and H. Kolanoski and H. K{\"u}ck and V. Mertens and R. Wedemeyer and M. Wollstadt and Y. Eisenberg and A. Eskreys and K. Gather and M. Hildebrandt and H. Hultschig and P. Joos and U. K{\"o}tz and H. Kowalski and A. Ladage and B. L{\"o}hr and D. L{\"u}ke and P. M{\"a}ttig and D. Notz and Nowak, {R. J.} and J. Pyrlik and M. Rushton and W. Sch{\"u}tte and D. Trines and T. Tymieniecka and G. Wolf and Ch Xiao and R. Fohrmann and E. Hilger and T. Kracht and Krasemann, {H. L.} and P. Leu and E. Lohrmann and D. Pandoulas and G. Poelz and P{\"o}snecker, {K. U.} and Wiik, {B. H.} and R. Beuselinck and Binnie, {D. M.} and Campbell, {A. J.} and P. Dornan and B. Foster and Garbutt, {D. A.} and C. Jenkins and Jones, {T. D.} and Jones, {W. G.} and J. McCardle and Sedgbeer, {J. K.} and J. Thomas and {Wan Abdullah}, {W. A.T.} and Bell, {K. W.} and Bowler, {M. G.} and P. Bull and Cashmore, {R. J.} and Clarke, {P. E.L.} and R. Devenish and P. Grossmann and Hawkes, {C. M.} and Lloyd, {S. L.} and Salmon, {G. L.} and C. Youngman and Forden, {G. E.} and Hart, {J. C.} and J. Harvey and Hasell, {D. K.} and J. Proudfoot and Saxon, {D. H.} and F. Barreiro and S. Brandt and M. Dittmar and M. Holder and G. Kreutz and B. Neumann and E. Duchovni and U. Karshon and G. Mikenberg and R. Mir and D. Revel and E. Ronat and A. Shapira and G. Yekutieli and G. Baranko and T. Barklow and A. Caldwell and M. Cherney and Izen, {J. M.} and M. Mermikides and G. Rudolph and D. Strom and M. Takashima and H. Venkataramania and E. Wicklund and {Lan Wu}, Sau and G. Zobernig",

note = "Funding Information: The properties of the point-like leptons e, ~t and r are of fundamental importance for a theoretical understanding of the constituents of matter. Thus far all experimental evidence suggests that the e,/l and r have identical properties except for effects due to their different masses. However, the coupfing of the r to the charged intermediate vector boson is still much less well determined than those of the e and/a. The only presently accessible experimental way to determine this coupling is to measure the ~{"} lifetime. Earlier measurements \[1\]w ere limited by poor resolution near the event vertex. Recently, the MARK II group at SLAC has determined the ~-lifetime with improved vertex resolution using a high precision drift chamber \[2\].I n this paper we present a r lifetime measurement obtained in a similar manner using a high precision drift chamber (vertex detector) installed close to the interaction region in the TASSO detector at the PETRA e+e - storage ring. The upgraded TASSO central detector is shown in 1 Present address: Siemens, Munich, Germany. 2 Present address: CERN, Geneva, Switzerland. 3 Supported by the Deutsches Bundesministerium ftir For-schung und Technologie. 4 Present address: University of California, Santa Cruz, CA, USA. s Present address: Lufthansa, Frankfurt, Germany. 6 On leave from Weizmann Institute, Rehovot, Israel. 7 On leave from Institute of Nuclear Physics, Cracow, Poland. 8 On leave from Warsaw University, Warsaw, Poland. 9 On leave from the University of Science and Technology of China, Hefei, China, Supported by the Konrad-Adenauer-Stiftung. lO Present address: Glasgow University, Glasgow, UK. 11 On leave from University Malaya, Kuala Lumpur, Malaya. 12 Supported by the UK Science and Engineering Research Council. 13 Present address: Argonne National Laboratory, Argonne IL, USA. 14 Supported by the Minerva Gesellschaft fiir Forschung mbH. 1 s Present address: SLAC, Stanford, CA. USA 16 Supported by the US Department of Energy contract DE-AC02-76ER00881.",

year = "1984",

month = jun,

day = "28",

doi = "10.1016/0370-2693(84)90214-4",

language = "English (US)",

volume = "141",

pages = "264--270",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

number = "3-4",

}

TY - JOUR

T1 - Determination of the τ lifetime in high energy e+e- annihilations

AU - Althof, M.

AU - Braunschweig, W.

AU - Kirschfink, F. J.

AU - Lübelsmeyer, K.

AU - Martyn, H. U.

AU - Rimkus, J.

AU - Rosskamp, P.

AU - Sander, H. G.

AU - Schmitz, D.

AU - Siebke, H.

AU - Wallraff, W.

AU - Fischer, H. M.

AU - Hartmann, H.

AU - Jocksch, A.

AU - Knop, G.

AU - Köpke, L.

AU - Kolanoski, H.

AU - Kück, H.

AU - Mertens, V.

AU - Wedemeyer, R.

AU - Wollstadt, M.

AU - Eisenberg, Y.

AU - Eskreys, A.

AU - Gather, K.

AU - Hildebrandt, M.

AU - Hultschig, H.

AU - Joos, P.

AU - Kötz, U.

AU - Kowalski, H.

AU - Ladage, A.

AU - Löhr, B.

AU - Lüke, D.

AU - Mättig, P.

AU - Notz, D.

AU - Nowak, R. J.

AU - Pyrlik, J.

AU - Rushton, M.

AU - Schütte, W.

AU - Trines, D.

AU - Tymieniecka, T.

AU - Wolf, G.

AU - Xiao, Ch

AU - Fohrmann, R.

AU - Hilger, E.

AU - Kracht, T.

AU - Krasemann, H. L.

AU - Leu, P.

AU - Lohrmann, E.

AU - Pandoulas, D.

AU - Poelz, G.

AU - Pösnecker, K. U.

AU - Wiik, B. H.

AU - Beuselinck, R.

AU - Binnie, D. M.

AU - Campbell, A. J.

AU - Dornan, P.

AU - Foster, B.

AU - Garbutt, D. A.

AU - Jenkins, C.

AU - Jones, T. D.

AU - Jones, W. G.

AU - McCardle, J.

AU - Sedgbeer, J. K.

AU - Thomas, J.

AU - Wan Abdullah, W. A.T.

AU - Bell, K. W.

AU - Bowler, M. G.

AU - Bull, P.

AU - Cashmore, R. J.

AU - Clarke, P. E.L.

AU - Devenish, R.

AU - Grossmann, P.

AU - Hawkes, C. M.

AU - Lloyd, S. L.

AU - Salmon, G. L.

AU - Youngman, C.

AU - Forden, G. E.

AU - Hart, J. C.

AU - Harvey, J.

AU - Hasell, D. K.

AU - Proudfoot, J.

AU - Saxon, D. H.

AU - Barreiro, F.

AU - Brandt, S.

AU - Dittmar, M.

AU - Holder, M.

AU - Kreutz, G.

AU - Neumann, B.

AU - Duchovni, E.

AU - Karshon, U.

AU - Mikenberg, G.

AU - Mir, R.

AU - Revel, D.

AU - Ronat, E.

AU - Shapira, A.

AU - Yekutieli, G.

AU - Baranko, G.

AU - Barklow, T.

AU - Caldwell, A.

AU - Cherney, M.

AU - Izen, J. M.

AU - Mermikides, M.

AU - Rudolph, G.

AU - Strom, D.

AU - Takashima, M.

AU - Venkataramania, H.

AU - Wicklund, E.

AU - Lan Wu, Sau

AU - Zobernig, G.

N1 - Funding Information: The properties of the point-like leptons e, ~t and r are of fundamental importance for a theoretical understanding of the constituents of matter. Thus far all experimental evidence suggests that the e,/l and r have identical properties except for effects due to their different masses. However, the coupfing of the r to the charged intermediate vector boson is still much less well determined than those of the e and/a. The only presently accessible experimental way to determine this coupling is to measure the ~" lifetime. Earlier measurements \[1\]w ere limited by poor resolution near the event vertex. Recently, the MARK II group at SLAC has determined the ~-lifetime with improved vertex resolution using a high precision drift chamber \[2\].I n this paper we present a r lifetime measurement obtained in a similar manner using a high precision drift chamber (vertex detector) installed close to the interaction region in the TASSO detector at the PETRA e+e - storage ring. The upgraded TASSO central detector is shown in 1 Present address: Siemens, Munich, Germany. 2 Present address: CERN, Geneva, Switzerland. 3 Supported by the Deutsches Bundesministerium ftir For-schung und Technologie. 4 Present address: University of California, Santa Cruz, CA, USA. s Present address: Lufthansa, Frankfurt, Germany. 6 On leave from Weizmann Institute, Rehovot, Israel. 7 On leave from Institute of Nuclear Physics, Cracow, Poland. 8 On leave from Warsaw University, Warsaw, Poland. 9 On leave from the University of Science and Technology of China, Hefei, China, Supported by the Konrad-Adenauer-Stiftung. lO Present address: Glasgow University, Glasgow, UK. 11 On leave from University Malaya, Kuala Lumpur, Malaya. 12 Supported by the UK Science and Engineering Research Council. 13 Present address: Argonne National Laboratory, Argonne IL, USA. 14 Supported by the Minerva Gesellschaft fiir Forschung mbH. 1 s Present address: SLAC, Stanford, CA. USA 16 Supported by the US Department of Energy contract DE-AC02-76ER00881.

PY - 1984/6/28

Y1 - 1984/6/28

N2 - We have determined the τ lifetime in e+e- annihilations at an average centre of mass energy of 42.5 GeV, using a pressurized drift chamber close to the interaction point. We find the lifetime to be (3.18-0.75 +0.59 ± 0.56) × 10-13 s. The charged weak τ coupling constant relative to that of the μ is found to be Gτ/Gμ = 0.94-0.09 +0.12 ± 0.09, in good agreement lepton universality.

AB - We have determined the τ lifetime in e+e- annihilations at an average centre of mass energy of 42.5 GeV, using a pressurized drift chamber close to the interaction point. We find the lifetime to be (3.18-0.75 +0.59 ± 0.56) × 10-13 s. The charged weak τ coupling constant relative to that of the μ is found to be Gτ/Gμ = 0.94-0.09 +0.12 ± 0.09, in good agreement lepton universality.

UR - http://www.scopus.com/inward/record.url?scp=0011563770&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0011563770&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(84)90214-4

DO - 10.1016/0370-2693(84)90214-4

M3 - Article

AN - SCOPUS:0011563770

VL - 141

SP - 264

EP - 270

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 - 3-4