Measurement of the branching fraction for γ (1S) → τ+τ-

D. Cinabro; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto; T. Bergfeld; B. I. Eisenstein; G. Gollin; B. Ong; M. Palmer; M. Selen; J. J. Thaler; K. W. Edwards; M. Ogg; A. Bellerive; D. I. Britton; E. R.F. Hyatt; D. B. MacFarlane; P. M. Patel; B. Spaan; A. J. Sadoff; R. Ammar; P. Baringer; A. Bean; D. Besson; D. Coppage; N. Copty; R. Davis; N. Hancock; M. Kelly; S. Kotov; I. Kravchenko; N. Kwak; H. Lam; Y. Kubota; M. Lattery; M. Momayezi; J. K. Nelson; S. Patton; R. Poling; V. Savinov; S. Schrenk; R. Wang; M. S. Alam; I. J. Kim; Z. Ling; A. H. Mahmood; J. J. O'Neill; H. Severini; C. R. Sun; F. Wappler; G. Crawford; C. M. Daubenmier; R. Fulton; D. Fujino; K. K. Gan; K. Honscheid; H. Kagan; R. Kass; J. Lee; R. Malchow; M. Sung; C. White; M. M. Zoeller; F. Butler; X. Fu; B. Nemati; W. R. Ross; P. Skubic; M. Wood; M. Bishai; J. Fast; E. Gerndt; J. W. Hinson; R. L. McIlwain; T. Miao; D. H. Miller; M. Modesitt; D. Payne; E. I. Shibata; I. P.J. Shipsey; P. N. Wang; M. Battle; J. Ernst; L. Gibbons; Y. Kwon; S. Roberts; E. H. Thorndike; C. H. Wang; J. Dominick; M. Lambrecht; S. Sanghera; V. Shelkov; T. Skwarnicki; R. Stroynowski; I. Volobouev; G. Wei; P. Zadorozhny; M. Artuso; M. Gao; M. Goldberg; D. He; N. Horwitz; G. C. Moneti; R. Mountain; F. Muheim; Y. Mukhin; S. Playfer; Y. Rozen; S. Stone; X. Xing; G. Zhu; J. Bartelt; S. E. Csorna; Z. Egyed; V. Jain; D. Gibaut; K. Kinoshita; P. Pomianowski; B. Barish; M. Chadha; S. Chan; D. F. Cowen; G. Eigen; J. S. Miller; C. O'Grady; J. Urheim; A. J. Weinstein; M. Athanas; W. Brower; G. Masek; H. P. Paar; M. Sivertz; J. Gronberg; R. Kutschke; S. Menary; R. J. Morrison; S. Nakanishi; H. N. Nelson; T. K. Nelson; C. Qiao; J. D. Richman; A. Ryd; D. Sperka; H. Tajima; M. S. Witherell; R. Balest; K. Cho; W. T. Ford; D. R. Johnson; K. Lingel; M. Lohner; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; K. Berkelman; K. Bloom; T. E. Browder; D. G. Cassel; H. A. Cho; D. M. Coffman; D. S. Crowcroft; P. S. Drell; D. J. Dumas; R. Ehrlich; P. Gaidarev; R. S. Galik; M. Garcia-Sciveres; B. Geiser; B. Gittelman; S. W. Gray; D. L. Hartill; B. K. Heltsley; S. Henderson; C. D. Jones; S. L. Jones; J. Kandaswamy; N. Katayama; P. C. Kim; D. L. Kreinick; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; J. R. Patterson; D. Peterson; D. Riley; S. Salman; M. Sapper; F. Würthwein; P. Avery; A. Freyberger; J. Rodriguez; S. Yang; J. Yelton

doi:10.1016/0370-2693(94)91309-9

Measurement of the branching fraction for γ (1S) → τ⁺τ^-

D. Cinabro, T. Liu, M. Saulnier, R. Wilson, H. Yamamoto, T. Bergfeld, B. I. Eisenstein, G. Gollin, B. Ong, M. Palmer, M. Selen, J. J. Thaler, K. W. Edwards, M. Ogg, A. Bellerive, D. I. Britton, E. R.F. Hyatt, D. B. MacFarlane, P. M. Patel, B. SpaanA. J. Sadoff, R. Ammar, P. Baringer, A. Bean, D. Besson, D. Coppage, N. Copty, R. Davis, N. Hancock, M. Kelly, S. Kotov, I. Kravchenko, N. Kwak, H. Lam, Y. Kubota, M. Lattery, M. Momayezi, J. K. Nelson, S. Patton, R. Poling, V. Savinov, S. Schrenk, R. Wang, M. S. Alam, I. J. Kim, Z. Ling, A. H. Mahmood, J. J. O'Neill, H. Severini, C. R. Sun, F. Wappler, G. Crawford, C. M. Daubenmier, R. Fulton, D. Fujino, K. K. Gan, K. Honscheid, H. Kagan, R. Kass, J. Lee, R. Malchow, M. Sung, C. White, M. M. Zoeller, F. Butler, X. Fu, B. Nemati, W. R. Ross, P. Skubic, M. Wood, M. Bishai, J. Fast, E. Gerndt, J. W. Hinson, R. L. McIlwain, T. Miao, D. H. Miller, M. Modesitt, D. Payne, E. I. Shibata, I. P.J. Shipsey, P. N. Wang, M. Battle, J. Ernst, L. Gibbons, Y. Kwon, S. Roberts, E. H. Thorndike, C. H. Wang, J. Dominick, M. Lambrecht, S. Sanghera, V. Shelkov, T. Skwarnicki, R. Stroynowski, I. Volobouev, G. Wei, P. Zadorozhny, M. Artuso, M. Gao, M. Goldberg, D. He, N. Horwitz, G. C. Moneti, R. Mountain, F. Muheim, Y. Mukhin, S. Playfer, Y. Rozen, S. Stone, X. Xing, G. Zhu, J. Bartelt, S. E. Csorna, Z. Egyed, V. Jain, D. Gibaut, K. Kinoshita, P. Pomianowski, B. Barish, M. Chadha, S. Chan, D. F. Cowen, G. Eigen, J. S. Miller, C. O'Grady, J. Urheim, A. J. Weinstein, M. Athanas, W. Brower, G. Masek, H. P. Paar, M. Sivertz, J. Gronberg, R. Kutschke, S. Menary, R. J. Morrison, S. Nakanishi, H. N. Nelson, T. K. Nelson, C. Qiao, J. D. Richman, A. Ryd, D. Sperka, H. Tajima, M. S. Witherell, R. Balest, K. Cho, W. T. Ford, D. R. Johnson, K. Lingel, M. Lohner, P. Rankin, J. G. Smith, J. P. Alexander, C. Bebek, K. Berkelman, K. Bloom, T. E. Browder, D. G. Cassel, H. A. Cho, D. M. Coffman, D. S. Crowcroft, P. S. Drell, D. J. Dumas, R. Ehrlich, P. Gaidarev, R. S. Galik, M. Garcia-Sciveres, B. Geiser, B. Gittelman, S. W. Gray, D. L. Hartill, B. K. Heltsley, S. Henderson, C. D. Jones, S. L. Jones, J. Kandaswamy, N. Katayama, P. C. Kim, D. L. Kreinick, G. S. Ludwig, J. Masui, J. Mevissen, N. B. Mistry, C. R. Ng, E. Nordberg, J. R. Patterson, D. Peterson, D. Riley, S. Salman, M. Sapper, F. Würthwein, P. Avery, A. Freyberger, J. Rodriguez, S. Yang, J. Yelton

Physics

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

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Abstract

We have studied the leptonic decay of the γ (1S) resonance into tau pairs using the CLEO II detector. A clean sample of tau pair events is identified via events containing two charged particles where exactly one of the particles is an identified electron. We find B(γ(1S) → τ⁺τ^-) = (2.61±0.12_-0.13 ^+0.09)%. The result is consistent with expectations from lepton universality.

Original language	English
Pages (from-to)	129-134
Number of pages	6
Journal	Physics Letters B
Volume	340
Issue number	1-2
DOIs	https://doi.org/10.1016/0370-2693(94)91309-9
State	Published - Dec 1 1994

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10.1016/0370-2693(94)91309-9

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Cinabro, D., Liu, T., Saulnier, M., Wilson, R., Yamamoto, H., Bergfeld, T., Eisenstein, B. I., Gollin, G., Ong, B., Palmer, M., Selen, M., Thaler, J. J., Edwards, K. W., Ogg, M., Bellerive, A., Britton, D. I., Hyatt, E. R. F., MacFarlane, D. B., Patel, P. M., ... Yelton, J. (1994). Measurement of the branching fraction for γ (1S) → τ⁺τ^- Physics Letters B, 340(1-2), 129-134. https://doi.org/10.1016/0370-2693(94)91309-9

@article{96c25690a87b4076871299782194e212,

title = "Measurement of the branching fraction for γ (1S) → τ+τ- ",

abstract = "We have studied the leptonic decay of the γ (1S) resonance into tau pairs using the CLEO II detector. A clean sample of tau pair events is identified via events containing two charged particles where exactly one of the particles is an identified electron. We find B(γ(1S) → τ+τ-) = (2.61±0.12-0.13 +0.09)%. The result is consistent with expectations from lepton universality.",

author = "D. Cinabro and T. Liu and M. Saulnier and R. Wilson and H. Yamamoto and T. Bergfeld and Eisenstein, {B. I.} and G. Gollin and B. Ong and M. Palmer and M. Selen and Thaler, {J. J.} and Edwards, {K. W.} and M. Ogg and A. Bellerive and Britton, {D. I.} and Hyatt, {E. R.F.} and MacFarlane, {D. B.} and Patel, {P. M.} and B. Spaan and Sadoff, {A. J.} and R. Ammar and P. Baringer and A. Bean and D. Besson and D. Coppage and N. Copty and R. Davis and N. Hancock and M. Kelly and S. Kotov and I. Kravchenko and N. Kwak and H. Lam and Y. Kubota and M. Lattery and M. Momayezi and Nelson, {J. K.} and S. Patton and R. Poling and V. Savinov and S. Schrenk and R. Wang and Alam, {M. S.} and Kim, {I. J.} and Z. Ling and Mahmood, {A. H.} and O'Neill, {J. J.} and H. Severini and Sun, {C. R.} and F. Wappler and G. Crawford and Daubenmier, {C. M.} and R. Fulton and D. Fujino and Gan, {K. K.} and K. Honscheid and H. Kagan and R. Kass and J. Lee and R. Malchow and M. Sung and C. White and Zoeller, {M. M.} and F. Butler and X. Fu and B. Nemati and Ross, {W. R.} and P. Skubic and M. Wood and M. Bishai and J. Fast and E. Gerndt and Hinson, {J. W.} and McIlwain, {R. L.} and T. Miao and Miller, {D. H.} and M. Modesitt and D. Payne and Shibata, {E. I.} and Shipsey, {I. P.J.} and Wang, {P. N.} and M. Battle and J. Ernst and L. Gibbons and Y. Kwon and S. Roberts and Thorndike, {E. H.} and Wang, {C. H.} and J. Dominick and M. Lambrecht and S. Sanghera and V. Shelkov and T. Skwarnicki and R. Stroynowski and I. Volobouev and G. Wei and P. Zadorozhny and M. Artuso and M. Gao and M. Goldberg and D. He and N. Horwitz and Moneti, {G. C.} and R. Mountain and F. Muheim and Y. Mukhin and S. Playfer and Y. Rozen and S. Stone and X. Xing and G. Zhu and J. Bartelt and Csorna, {S. E.} and Z. Egyed and V. Jain and D. Gibaut and K. Kinoshita and P. Pomianowski and B. Barish and M. Chadha and S. Chan and Cowen, {D. F.} and G. Eigen and Miller, {J. S.} and C. O'Grady and J. Urheim and Weinstein, {A. J.} and M. Athanas and W. Brower and G. Masek and Paar, {H. P.} and M. Sivertz and J. Gronberg and R. Kutschke and S. Menary and Morrison, {R. J.} and S. Nakanishi and Nelson, {H. N.} and Nelson, {T. K.} and C. Qiao and Richman, {J. D.} and A. Ryd and D. Sperka and H. Tajima and Witherell, {M. S.} and R. Balest and K. Cho and Ford, {W. T.} and Johnson, {D. R.} and K. Lingel and M. Lohner and P. Rankin and Smith, {J. G.} and Alexander, {J. P.} and C. Bebek and K. Berkelman and K. Bloom and Browder, {T. E.} and Cassel, {D. G.} and Cho, {H. A.} and Coffman, {D. M.} and Crowcroft, {D. S.} and Drell, {P. S.} and Dumas, {D. J.} and R. Ehrlich and P. Gaidarev and Galik, {R. S.} and M. Garcia-Sciveres and B. Geiser and B. Gittelman and Gray, {S. W.} and Hartill, {D. L.} and Heltsley, {B. K.} and S. Henderson and Jones, {C. D.} and Jones, {S. L.} and J. Kandaswamy and N. Katayama and Kim, {P. C.} and Kreinick, {D. L.} and Ludwig, {G. S.} and J. Masui and J. Mevissen and Mistry, {N. B.} and Ng, {C. R.} and E. Nordberg and Patterson, {J. R.} and D. Peterson and D. Riley and S. Salman and M. Sapper and F. W{\"u}rthwein and P. Avery and A. Freyberger and J. Rodriguez and S. Yang and J. Yelton",

note = "Funding Information: We gratefully acknowledge the effort of the CESR staff in providing us with excellent luminosity and running conditions. LEA. and P.S.D. thank the PYI program of the NSF, I.P.J.S. thanks the YI program of the NSF, G.E. thanks the Heisenberg Foundation, I.P.J.S., and T.S. thank the TNRLC, K.K.G., M.S., H.N.N., J.D.R., T.S. and H.Y. thank the OJI program of DOE and P.R. thanks the A.P. Sloan Foundation for support. This work was supported by the National Science Foundation, the U.S. Dept. of Energy and the Natural Sciences and Engineering Research Council of Canada.",

year = "1994",

month = dec,

day = "1",

doi = "10.1016/0370-2693(94)91309-9",

language = "English",

volume = "340",

pages = "129--134",

journal = "Physics Letters B",

issn = "0370-2693",

number = "1-2",

}

Cinabro, D, Liu, T, Saulnier, M, Wilson, R, Yamamoto, H, Bergfeld, T, Eisenstein, BI, Gollin, G, Ong, B, Palmer, M, Selen, M, Thaler, JJ, Edwards, KW, Ogg, M, Bellerive, A, Britton, DI, Hyatt, ERF, MacFarlane, DB, Patel, PM, Spaan, B, Sadoff, AJ, Ammar, R, Baringer, P, Bean, A, Besson, D, Coppage, D, Copty, N, Davis, R, Hancock, N, Kelly, M, Kotov, S, Kravchenko, I, Kwak, N, Lam, H, Kubota, Y, Lattery, M, Momayezi, M, Nelson, JK, Patton, S, Poling, R, Savinov, V, Schrenk, S, Wang, R, Alam, MS, Kim, IJ, Ling, Z, Mahmood, AH, O'Neill, JJ, Severini, H, Sun, CR, Wappler, F, Crawford, G, Daubenmier, CM, Fulton, R, Fujino, D, Gan, KK, Honscheid, K, Kagan, H, Kass, R, Lee, J, Malchow, R, Sung, M, White, C, Zoeller, MM, Butler, F, Fu, X, Nemati, B, Ross, WR, Skubic, P, Wood, M, Bishai, M, Fast, J, Gerndt, E, Hinson, JW, McIlwain, RL, Miao, T, Miller, DH, Modesitt, M, Payne, D, Shibata, EI, Shipsey, IPJ, Wang, PN, Battle, M, Ernst, J, Gibbons, L, Kwon, Y, Roberts, S, Thorndike, EH, Wang, CH, Dominick, J, Lambrecht, M, Sanghera, S, Shelkov, V, Skwarnicki, T, Stroynowski, R, Volobouev, I, Wei, G, Zadorozhny, P, Artuso, M, Gao, M, Goldberg, M, He, D, Horwitz, N, Moneti, GC, Mountain, R, Muheim, F, Mukhin, Y, Playfer, S, Rozen, Y, Stone, S, Xing, X, Zhu, G, Bartelt, J, Csorna, SE, Egyed, Z, Jain, V, Gibaut, D, Kinoshita, K, Pomianowski, P, Barish, B, Chadha, M, Chan, S, Cowen, DF, Eigen, G, Miller, JS, O'Grady, C, Urheim, J, Weinstein, AJ, Athanas, M, Brower, W, Masek, G, Paar, HP, Sivertz, M, Gronberg, J, Kutschke, R, Menary, S, Morrison, RJ, Nakanishi, S, Nelson, HN, Nelson, TK, Qiao, C, Richman, JD, Ryd, A, Sperka, D, Tajima, H, Witherell, MS, Balest, R, Cho, K, Ford, WT, Johnson, DR, Lingel, K, Lohner, M, Rankin, P, Smith, JG, Alexander, JP, Bebek, C, Berkelman, K, Bloom, K, Browder, TE, Cassel, DG, Cho, HA, Coffman, DM, Crowcroft, DS, Drell, PS, Dumas, DJ, Ehrlich, R, Gaidarev, P, Galik, RS, Garcia-Sciveres, M, Geiser, B, Gittelman, B, Gray, SW, Hartill, DL, Heltsley, BK, Henderson, S, Jones, CD, Jones, SL, Kandaswamy, J, Katayama, N, Kim, PC, Kreinick, DL, Ludwig, GS, Masui, J, Mevissen, J, Mistry, NB, Ng, CR, Nordberg, E, Patterson, JR, Peterson, D, Riley, D, Salman, S, Sapper, M, Würthwein, F, Avery, P, Freyberger, A, Rodriguez, J, Yang, S & Yelton, J 1994, 'Measurement of the branching fraction for γ (1S) → τ⁺τ^- ', Physics Letters B, vol. 340, no. 1-2, pp. 129-134. https://doi.org/10.1016/0370-2693(94)91309-9

TY - JOUR

T1 - Measurement of the branching fraction for γ (1S) → τ+τ-

AU - Cinabro, D.

AU - Liu, T.

AU - Saulnier, M.

AU - Wilson, R.

AU - Yamamoto, H.

AU - Bergfeld, T.

AU - Eisenstein, B. I.

AU - Gollin, G.

AU - Ong, B.

AU - Palmer, M.

AU - Selen, M.

AU - Thaler, J. J.

AU - Edwards, K. W.

AU - Ogg, M.

AU - Bellerive, A.

AU - Britton, D. I.

AU - Hyatt, E. R.F.

AU - MacFarlane, D. B.

AU - Patel, P. M.

AU - Spaan, B.

AU - Sadoff, A. J.

AU - Ammar, R.

AU - Baringer, P.

AU - Bean, A.

AU - Besson, D.

AU - Coppage, D.

AU - Copty, N.

AU - Davis, R.

AU - Hancock, N.

AU - Kelly, M.

AU - Kotov, S.

AU - Kravchenko, I.

AU - Kwak, N.

AU - Lam, H.

AU - Kubota, Y.

AU - Lattery, M.

AU - Momayezi, M.

AU - Nelson, J. K.

AU - Patton, S.

AU - Poling, R.

AU - Savinov, V.

AU - Schrenk, S.

AU - Wang, R.

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 - Wappler, F.

AU - Crawford, G.

AU - Daubenmier, C. M.

AU - Fulton, R.

AU - Fujino, D.

AU - Gan, K. K.

AU - Honscheid, K.

AU - Kagan, H.

AU - Kass, R.

AU - Lee, J.

AU - Malchow, R.

AU - Sung, M.

AU - White, C.

AU - Zoeller, M. M.

AU - Butler, F.

AU - Fu, X.

AU - Nemati, B.

AU - Ross, W. R.

AU - Skubic, P.

AU - Wood, M.

AU - Bishai, M.

AU - Fast, J.

AU - Gerndt, E.

AU - Hinson, J. W.

AU - McIlwain, R. L.

AU - Miao, T.

AU - Miller, D. H.

AU - Modesitt, M.

AU - Payne, D.

AU - Shibata, E. I.

AU - Shipsey, I. P.J.

AU - Wang, P. N.

AU - Battle, M.

AU - Ernst, J.

AU - Gibbons, L.

AU - Kwon, Y.

AU - Roberts, S.

AU - Thorndike, E. H.

AU - Wang, C. H.

AU - Dominick, J.

AU - Lambrecht, M.

AU - Sanghera, S.

AU - Shelkov, V.

AU - Skwarnicki, T.

AU - Stroynowski, R.

AU - Volobouev, I.

AU - Wei, G.

AU - Zadorozhny, P.

AU - Artuso, M.

AU - Gao, M.

AU - Goldberg, M.

AU - He, D.

AU - Horwitz, N.

AU - Moneti, G. C.

AU - Mountain, R.

AU - Muheim, F.

AU - Mukhin, Y.

AU - Playfer, S.

AU - Rozen, Y.

AU - Stone, S.

AU - Xing, X.

AU - Zhu, G.

AU - Bartelt, J.

AU - Csorna, S. E.

AU - Egyed, Z.

AU - Jain, V.

AU - Gibaut, D.

AU - Kinoshita, K.

AU - Pomianowski, P.

AU - Barish, B.

AU - Chadha, M.

AU - Chan, S.

AU - Cowen, D. F.

AU - Eigen, G.

AU - Miller, J. S.

AU - O'Grady, C.

AU - Urheim, J.

AU - Weinstein, A. J.

AU - Athanas, M.

AU - Brower, W.

AU - Masek, G.

AU - Paar, H. P.

AU - Sivertz, M.

AU - Gronberg, J.

AU - Kutschke, R.

AU - Menary, S.

AU - Morrison, R. J.

AU - Nakanishi, S.

AU - Nelson, H. N.

AU - Nelson, T. K.

AU - Qiao, C.

AU - Richman, J. D.

AU - Ryd, A.

AU - Sperka, D.

AU - Tajima, H.

AU - Witherell, M. S.

AU - Balest, R.

AU - Cho, K.

AU - Ford, W. T.

AU - Johnson, D. R.

AU - Lingel, K.

AU - Lohner, M.

AU - Rankin, P.

AU - Smith, J. G.

AU - Alexander, J. P.

AU - Bebek, C.

AU - Berkelman, K.

AU - Bloom, K.

AU - Browder, T. E.

AU - Cassel, D. G.

AU - Cho, H. A.

AU - Coffman, D. M.

AU - Crowcroft, D. S.

AU - Drell, P. S.

AU - Dumas, D. J.

AU - Ehrlich, R.

AU - Gaidarev, P.

AU - Galik, R. S.

AU - Garcia-Sciveres, M.

AU - Geiser, B.

AU - Gittelman, B.

AU - Gray, S. W.

AU - Hartill, D. L.

AU - Heltsley, B. K.

AU - Henderson, S.

AU - Jones, C. D.

AU - Jones, S. L.

AU - Kandaswamy, J.

AU - Katayama, N.

AU - Kim, P. C.

AU - Kreinick, D. L.

AU - Ludwig, G. S.

AU - Masui, J.

AU - Mevissen, J.

AU - Mistry, N. B.

AU - Ng, C. R.

AU - Nordberg, E.

AU - Patterson, J. R.

AU - Peterson, D.

AU - Riley, D.

AU - Salman, S.

AU - Sapper, M.

AU - Würthwein, F.

AU - Avery, P.

AU - Freyberger, A.

AU - Rodriguez, J.

AU - Yang, S.

AU - Yelton, J.

N1 - Funding Information: We gratefully acknowledge the effort of the CESR staff in providing us with excellent luminosity and running conditions. LEA. and P.S.D. thank the PYI program of the NSF, I.P.J.S. thanks the YI program of the NSF, G.E. thanks the Heisenberg Foundation, I.P.J.S., and T.S. thank the TNRLC, K.K.G., M.S., H.N.N., J.D.R., T.S. and H.Y. thank the OJI program of DOE and P.R. thanks the A.P. Sloan Foundation for support. This work was supported by the National Science Foundation, the U.S. Dept. of Energy and the Natural Sciences and Engineering Research Council of Canada.

PY - 1994/12/1

Y1 - 1994/12/1

N2 - We have studied the leptonic decay of the γ (1S) resonance into tau pairs using the CLEO II detector. A clean sample of tau pair events is identified via events containing two charged particles where exactly one of the particles is an identified electron. We find B(γ(1S) → τ+τ-) = (2.61±0.12-0.13 +0.09)%. The result is consistent with expectations from lepton universality.

AB - We have studied the leptonic decay of the γ (1S) resonance into tau pairs using the CLEO II detector. A clean sample of tau pair events is identified via events containing two charged particles where exactly one of the particles is an identified electron. We find B(γ(1S) → τ+τ-) = (2.61±0.12-0.13 +0.09)%. The result is consistent with expectations from lepton universality.

UR - http://www.scopus.com/inward/record.url?scp=4243692801&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(94)91309-9

DO - 10.1016/0370-2693(94)91309-9

M3 - Article

AN - SCOPUS:4243692801

SN - 0370-2693

VL - 340

SP - 129

EP - 134

JO - Physics Letters B

JF - Physics Letters B

IS - 1-2

ER -

Measurement of the branching fraction for γ (1S) → τ⁺τ^-

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