A Measurement of the Michel Parameters in Leptonic Decays of the Tau

CLEO Collaboration

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We have measured the spectral shape Michel parameters ρ and η using leptonic decays of the τ, recorded by the CLEO II detector. Assuming e - μ universality in the vectorlike couplings, we find ρ = 0.735 ± 0.013 ± 0.008, where the first error is statistical and the second systematic. We also present measurements for the parameters for e and μ final states separately.

Original languageEnglish
Pages (from-to)4686-4690
Number of pages5
JournalPhysical Review Letters
Volume78
Issue number25
DOIs
Publication statusPublished - 1997 Jun 23

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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CLEO Collaboration. / A Measurement of the Michel Parameters in Leptonic Decays of the Tau. In: Physical Review Letters. 1997 ; Vol. 78, No. 25. pp. 4686-4690.
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abstract = "We have measured the spectral shape Michel parameters ρ and η using leptonic decays of the τ, recorded by the CLEO II detector. Assuming e - μ universality in the vectorlike couplings, we find ρeμ = 0.735 ± 0.013 ± 0.008, where the first error is statistical and the second systematic. We also present measurements for the parameters for e and μ final states separately.",
author = "{CLEO Collaboration} and R. Ammar and P. Baringer and A. Bean and D. Besson and D. Coppage and C. Darling and R. Davis and N. Hancock and S. Kotov and I. Kravchenko and N. Kwak and S. Anderson and Y. Kubota and M. Lattery and O’Neill, {J. J.} and S. Patton and R. Poling and T. Riehle and V. Savinov and A. Smith and Alam, {M. S.} and Athar, {S. B.} and Z. Ling and Mahmood, {A. H.} and H. Severini and S. Timm and F. Wappler and A. Anastassov and S. Blinov and Duboscq, {J. E.} and D. Fujino and R. Fulton and Gan, {K. K.} and T. Hart and K. Honscheid and H. Kagan and R. Kass and J. Lee and Spencer, {M. B.} and M. Sung and A. Undrus and R. Wanke and A. Wolf and Zoeller, {M. M.} and B. Nemati and Richichi, {S. J.} and Ross, {W. R.} and P. Skubic and M. Wood and M. Bishai",
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A Measurement of the Michel Parameters in Leptonic Decays of the Tau. / CLEO Collaboration.

In: Physical Review Letters, Vol. 78, No. 25, 23.06.1997, p. 4686-4690.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A Measurement of the Michel Parameters in Leptonic Decays of the Tau

AU - CLEO Collaboration

AU - Ammar, R.

AU - Baringer, P.

AU - Bean, A.

AU - Besson, D.

AU - Coppage, D.

AU - Darling, C.

AU - Davis, R.

AU - Hancock, N.

AU - Kotov, S.

AU - Kravchenko, I.

AU - Kwak, N.

AU - Anderson, S.

AU - Kubota, Y.

AU - Lattery, M.

AU - O’Neill, J. J.

AU - Patton, S.

AU - Poling, R.

AU - Riehle, T.

AU - Savinov, V.

AU - Smith, A.

AU - Alam, M. S.

AU - Athar, S. B.

AU - Ling, Z.

AU - Mahmood, A. H.

AU - Severini, H.

AU - Timm, S.

AU - Wappler, F.

AU - Anastassov, A.

AU - Blinov, S.

AU - Duboscq, J. E.

AU - Fujino, D.

AU - Fulton, R.

AU - Gan, K. K.

AU - Hart, T.

AU - Honscheid, K.

AU - Kagan, H.

AU - Kass, R.

AU - Lee, J.

AU - Spencer, M. B.

AU - Sung, M.

AU - Undrus, A.

AU - Wanke, R.

AU - Wolf, A.

AU - Zoeller, M. M.

AU - Nemati, B.

AU - Richichi, S. J.

AU - Ross, W. R.

AU - Skubic, P.

AU - Wood, M.

AU - Bishai, M.

PY - 1997/6/23

Y1 - 1997/6/23

N2 - We have measured the spectral shape Michel parameters ρ and η using leptonic decays of the τ, recorded by the CLEO II detector. Assuming e - μ universality in the vectorlike couplings, we find ρeμ = 0.735 ± 0.013 ± 0.008, where the first error is statistical and the second systematic. We also present measurements for the parameters for e and μ final states separately.

AB - We have measured the spectral shape Michel parameters ρ and η using leptonic decays of the τ, recorded by the CLEO II detector. Assuming e - μ universality in the vectorlike couplings, we find ρeμ = 0.735 ± 0.013 ± 0.008, where the first error is statistical and the second systematic. We also present measurements for the parameters for e and μ final states separately.

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JO - Physical Review Letters

JF - Physical Review Letters

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