Tau Decays into Three Charged Leptons and Two Neutrinos

M. S. Alam; I. J. Kim; Z. Ling; A. H. Mahmood; J. J. O’neill; H. Severini; C. R. Sun; S. Timm; F. Wappler; J. E. Duboscq; R. Fulton; D. Fujino; K. K. Gan; K. Honscheid; H. Kagan; R. Kass; J. Lee; M. Sung; C. White; R. Wanke; A. Wolf; M. M. Zoeller; X. Fu; B. Nemati; S. J. Richichi; W. R. Ross; P. Skubic; M. Wood; M. Bishai; J. Fast; E. Gerndt; J. W. Hinson; T. Miao; D. H. Miller; M. Modesitt; E. I. Shibata; I. P.J. Shipsey; P. N. Wang; L. Gibbons; S. D. Johnson; Y. Kwon; S. Roberts; E. H. Thorndike; C. P. Jessop; K. Lingel; H. Marsiske; M. L. Perl; S. F. Schaffner; Y. Kubota; R. Poling; CLEO Collaboration

doi:10.1103/PhysRevLett.76.2637

Tau Decays into Three Charged Leptons and Two Neutrinos

M. S. Alam, I. J. Kim, Z. Ling, A. H. Mahmood, J. J. O’neill, H. Severini, C. R. Sun, S. Timm, F. Wappler, J. E. Duboscq, R. Fulton, D. Fujino, K. K. Gan, K. Honscheid, H. Kagan, R. Kass, J. Lee, M. Sung, C. White, R. WankeA. Wolf, M. M. Zoeller, X. Fu, B. Nemati, S. J. Richichi, W. R. Ross, P. Skubic, M. Wood, M. Bishai, J. Fast, E. Gerndt, J. W. Hinson, T. Miao, D. H. Miller, M. Modesitt, E. I. Shibata, I. P.J. Shipsey, P. N. Wang, L. Gibbons, S. D. Johnson, Y. Kwon, S. Roberts, E. H. Thorndike, C. P. Jessop, K. Lingel, H. Marsiske, M. L. Perl, S. F. Schaffner, Y. Kubota, R. Poling, CLEO Collaboration

Physics and Astronomy (Twin Cities)

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Abstract

We search for the radiative leptonic tau decays τ→ee⁺e⁻ν_τν_e and τ→μe⁺e⁻ν_τν_μ using 3.60fb⁻¹ of data collected by the CLEO-II experiment at the Cornell Electron Storage Ring. We present a first observation of the τ→ee⁺e⁻ν_τν_e process. For this channel we measure the branching fraction B(τ→ee⁺e⁻ν_τν_e) = (2.7^+1.5+0.4+0.1_{−1.1−0.4−0.3})×10⁻⁵. An upper limit is established for the second channel: B(τ→μe⁺e⁻ν_τν_μ) < 3.2 × 10⁻⁵ at 90% C.L. Both results are consistent with the rates expected from standard model predictions.

Original language	English (US)
Pages (from-to)	2637-2641
Number of pages	5
Journal	Physical review letters
Volume	76
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.76.2637
State	Published - 1996

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10.1103/PhysRevLett.76.2637

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Alam, M. S., Kim, I. J., Ling, Z., Mahmood, A. H., O’neill, J. J., Severini, H., Sun, C. R., Timm, S., Wappler, F., Duboscq, J. E., Fulton, R., Fujino, D., Gan, K. K., Honscheid, K., Kagan, H., Kass, R., Lee, J., Sung, M., White, C., ... CLEO Collaboration (1996). Tau Decays into Three Charged Leptons and Two Neutrinos. Physical review letters, 76(15), 2637-2641. https://doi.org/10.1103/PhysRevLett.76.2637

Alam, MS, Kim, IJ, Ling, Z, Mahmood, AH, O’neill, JJ, Severini, H, Sun, CR, Timm, S, Wappler, F, Duboscq, JE, Fulton, R, Fujino, D, Gan, KK, Honscheid, K, Kagan, H, Kass, R, Lee, J, Sung, M, White, C, Wanke, R, Wolf, A, Zoeller, MM, Fu, X, Nemati, B, Richichi, SJ, Ross, WR, Skubic, P, Wood, M, Bishai, M, Fast, J, Gerndt, E, Hinson, JW, Miao, T, Miller, DH, Modesitt, M, Shibata, EI, Shipsey, IPJ, Wang, PN, Gibbons, L, Johnson, SD, Kwon, Y, Roberts, S, Thorndike, EH, Jessop, CP, Lingel, K, Marsiske, H, Perl, ML, Schaffner, SF, Kubota, Y, Poling, R & CLEO Collaboration 1996, 'Tau Decays into Three Charged Leptons and Two Neutrinos', Physical review letters, vol. 76, no. 15, pp. 2637-2641. https://doi.org/10.1103/PhysRevLett.76.2637

@article{fb1dda9c4c854ab2b08e3ac09e9577b4,

title = "Tau Decays into Three Charged Leptons and Two Neutrinos",

abstract = "We search for the radiative leptonic tau decays τ→ee+e−ντνe and τ→μe+e−ντνμ using 3.60fb−1 of data collected by the CLEO-II experiment at the Cornell Electron Storage Ring. We present a first observation of the τ→ee+e−ντνe process. For this channel we measure the branching fraction B(τ→ee+e−ντνe) = (2.7+1.5+0.4+0.1−1.1−0.4−0.3)×10−5. An upper limit is established for the second channel: B(τ→μe+e−ντνμ) < 3.2 × 10−5 at 90\% C.L. Both results are consistent with the rates expected from standard model predictions.",

author = "Alam, \{M. S.\} and Kim, \{I. J.\} and Z. Ling and Mahmood, \{A. H.\} and O{\textquoteright}neill, \{J. J.\} and H. Severini and Sun, \{C. R.\} and S. Timm and F. Wappler and Duboscq, \{J. E.\} and R. Fulton and D. Fujino and Gan, \{K. K.\} and K. Honscheid and H. Kagan and R. Kass and J. Lee and M. Sung and C. White and R. Wanke and A. Wolf and Zoeller, \{M. M.\} and X. Fu and B. Nemati and Richichi, \{S. J.\} and Ross, \{W. R.\} and P. Skubic and M. Wood and M. Bishai and J. Fast and E. Gerndt and Hinson, \{J. W.\} and T. Miao and Miller, \{D. H.\} and M. Modesitt and Shibata, \{E. I.\} and Shipsey, \{I. P.J.\} and Wang, \{P. N.\} and L. Gibbons and Johnson, \{S. D.\} and Y. Kwon and S. Roberts and Thorndike, \{E. H.\} and Jessop, \{C. P.\} and K. Lingel and H. Marsiske and Perl, \{M. L.\} and Schaffner, \{S. F.\} and Y. Kubota and R. Poling and \{CLEO Collaboration\}",

year = "1996",

doi = "10.1103/PhysRevLett.76.2637",

language = "English (US)",

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T1 - Tau Decays into Three Charged Leptons and Two Neutrinos

AU - Alam, M. S.

AU - Kim, I. J.

AU - Ling, Z.

AU - Mahmood, A. H.

AU - O’neill, J. J.

AU - Severini, H.

AU - Sun, C. R.

AU - Timm, S.

AU - Wappler, F.

AU - Duboscq, J. E.

AU - Fulton, R.

AU - Fujino, D.

AU - Gan, K. K.

AU - Honscheid, K.

AU - Kagan, H.

AU - Kass, R.

AU - Lee, J.

AU - Sung, M.

AU - White, C.

AU - Wanke, R.

AU - Wolf, A.

AU - Zoeller, M. M.

AU - Fu, X.

AU - Nemati, B.

AU - Richichi, S. J.

AU - Ross, W. R.

AU - Skubic, P.

AU - Wood, M.

AU - Bishai, M.

AU - Fast, J.

AU - Gerndt, E.

AU - Hinson, J. W.

AU - Miao, T.

AU - Miller, D. H.

AU - Modesitt, M.

AU - Shibata, E. I.

AU - Shipsey, I. P.J.

AU - Wang, P. N.

AU - Gibbons, L.

AU - Johnson, S. D.

AU - Kwon, Y.

AU - Roberts, S.

AU - Thorndike, E. H.

AU - Jessop, C. P.

AU - Lingel, K.

AU - Marsiske, H.

AU - Perl, M. L.

AU - Schaffner, S. F.

AU - Kubota, Y.

AU - Poling, R.

AU - CLEO Collaboration

PY - 1996

Y1 - 1996

N2 - We search for the radiative leptonic tau decays τ→ee+e−ντνe and τ→μe+e−ντνμ using 3.60fb−1 of data collected by the CLEO-II experiment at the Cornell Electron Storage Ring. We present a first observation of the τ→ee+e−ντνe process. For this channel we measure the branching fraction B(τ→ee+e−ντνe) = (2.7+1.5+0.4+0.1−1.1−0.4−0.3)×10−5. An upper limit is established for the second channel: B(τ→μe+e−ντνμ) < 3.2 × 10−5 at 90% C.L. Both results are consistent with the rates expected from standard model predictions.

AB - We search for the radiative leptonic tau decays τ→ee+e−ντνe and τ→μe+e−ντνμ using 3.60fb−1 of data collected by the CLEO-II experiment at the Cornell Electron Storage Ring. We present a first observation of the τ→ee+e−ντνe process. For this channel we measure the branching fraction B(τ→ee+e−ντνe) = (2.7+1.5+0.4+0.1−1.1−0.4−0.3)×10−5. An upper limit is established for the second channel: B(τ→μe+e−ντνμ) < 3.2 × 10−5 at 90% C.L. Both results are consistent with the rates expected from standard model predictions.

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U2 - 10.1103/PhysRevLett.76.2637

DO - 10.1103/PhysRevLett.76.2637

M3 - Article

AN - SCOPUS:4243818968

SN - 0031-9007

VL - 76

SP - 2637

EP - 2641

JO - Physical review letters

JF - Physical review letters

IS - 15

ER -

Tau Decays into Three Charged Leptons and Two Neutrinos

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