Measurement of αS from τ decays

T. Coan; J. Dominick; V. Fadeyev; I. Korolkov; M. Lambrecht; S. Sanghera; V. Shelkov; T. Skwarnicki; R. Stroynowski; I. Volobouev; G. Wei; 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; F. Würthwein; D. M. Asner; M. Athanas; D. W. Bliss; W. S. Brower; G. Masek; H. P. Paar; M. Sivertz; J. Gronberg; C. M. Korte; R. Kutschke; S. Menary; R. J. Morrison; S. Nakanishi; H. N. Nelson; T. K. Nelson; C. Qiao; J. D. Richman; D. Roberts; A. Ryd; H. Tajima; M. S. Witherell; R. Balest; K. Cho; W. T. Ford; M. Lohner; H. Park; P. Rankin; J. G. Smith; J. P. Alexander; C. Bebek; B. E. Berger; K. Berkelman; K. Bloom; T. E. Browder; D. G. Cassel; H. A. Cho; D. M. Coffman; D. S. Crowcroft; M. Dickson; P. S. Drell; D. J. Dumas; R. Ehrlich; R. Elia; P. Gaidarev; R. S. Galik; M. Garcia-Sciveres; 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; Y. Liu; G. S. Ludwig; J. Masui; J. Mevissen; N. B. Mistry; C. R. Ng; E. Nordberg; J. R. Patterson; D. Peterson; D. Riley; A. Soffer; P. Avery; A. Freyberger; K. Lingel; J. Rodriguez; S. Yang; J. Yelton; G. Brandenburg; D. Cinabro; T. Liu; M. Saulnier; R. Wilson; H. Yamamoto; T. Bergfeld; B. I. Eisenstein; J. Ernst; G. E. Gladding; G. D. Gollin; M. Palmer; M. Selen; J. J. Thaler; K. W. Edwards; K. W. McLean; M. Ogg; A. Bellerive; D. I. Britton; E. R.F. Hyatt; R. Janicek; 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; R. Fulton; D. Fujino; K. K. Gan; K. Honscheid; H. Kagan; R. Kass; J. Lee; M. Sung; C. White; A. Wolf; M. M. Zoeller; 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; L. Gibbons; Y. Kwon; S. Roberts; E. H. Thorndike

doi:10.1016/0370-2693(95)00824-5

Measurement of α_S from τ decays

T. Coan, J. Dominick, V. Fadeyev, I. Korolkov, M. Lambrecht, S. Sanghera, V. Shelkov, T. Skwarnicki, R. Stroynowski, I. Volobouev, G. Wei, M. Artuso, M. Gao, M. Goldberg, D. He, N. Horwitz, G. C. Moneti, R. Mountain, F. Muheim, Y. MukhinS. 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, F. Würthwein, D. M. Asner, M. Athanas, D. W. Bliss, W. S. Brower, G. Masek, H. P. Paar, M. Sivertz, J. Gronberg, C. M. Korte, R. Kutschke, S. Menary, R. J. Morrison, S. Nakanishi, H. N. Nelson, T. K. Nelson, C. Qiao, J. D. Richman, D. Roberts, A. Ryd, H. Tajima, M. S. Witherell, R. Balest, K. Cho, W. T. Ford, M. Lohner, H. Park, P. Rankin, J. G. Smith, J. P. Alexander, C. Bebek, B. E. Berger, K. Berkelman, K. Bloom, T. E. Browder, D. G. Cassel, H. A. Cho, D. M. Coffman, D. S. Crowcroft, M. Dickson, P. S. Drell, D. J. Dumas, R. Ehrlich, R. Elia, P. Gaidarev, R. S. Galik, M. Garcia-Sciveres, 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, Y. Liu, G. S. Ludwig, J. Masui, J. Mevissen, N. B. Mistry, C. R. Ng, E. Nordberg, J. R. Patterson, D. Peterson, D. Riley, A. Soffer, P. Avery, A. Freyberger, K. Lingel, J. Rodriguez, S. Yang, J. Yelton, G. Brandenburg, D. Cinabro, T. Liu, M. Saulnier, R. Wilson, H. Yamamoto, T. Bergfeld, B. I. Eisenstein, J. Ernst, G. E. Gladding, G. D. Gollin, M. Palmer, M. Selen, J. J. Thaler, K. W. Edwards, K. W. McLean, M. Ogg, A. Bellerive, D. I. Britton, E. R.F. Hyatt, R. Janicek, 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, R. Fulton, D. Fujino, K. K. Gan, K. Honscheid, H. Kagan, R. Kass, J. Lee, M. Sung, C. White, A. Wolf, M. M. Zoeller, 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, L. Gibbons, Y. Kwon, S. Roberts, E. H. Thorndike

Physics

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

85 Scopus citations

Abstract

We present measurements of spectral moments extracted from the invariant mass distributions of the final states of hadronic τ decay products recorded in the CLEO detector. From a fit of theoretical predictions to the measurements of spectral moments and the total hadronic decay width of the τ, we determine the strong coupling constant and a set of non-perturbative QCD parameters. The strong coupling constant is measured to be α_s(m_τ) = 0.306 ± 0.024, which when extrapolated to the Z mass, yields α_s(M_z) = 0.114 ± 0.003.

Original language	English
Pages (from-to)	580-588
Number of pages	9
Journal	Physics Letters B
Volume	356
Issue number	4
DOIs	https://doi.org/10.1016/0370-2693(95)00824-5
State	Published - Aug 24 1995

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10.1016/0370-2693(95)00824-5

Cite this

Coan, T., Dominick, J., Fadeyev, V., Korolkov, I., Lambrecht, M., Sanghera, S., Shelkov, V., Skwarnicki, T., Stroynowski, R., Volobouev, I., Wei, G., Artuso, M., Gao, M., Goldberg, M., He, D., Horwitz, N., Moneti, G. C., Mountain, R., Muheim, F., ... Thorndike, E. H. (1995). Measurement of α_S from τ decays. Physics Letters B, 356(4), 580-588. https://doi.org/10.1016/0370-2693(95)00824-5

@article{24f678b0bdd54f43b9c7e0a880a51e0c,

title = "Measurement of αS from τ decays",

abstract = "We present measurements of spectral moments extracted from the invariant mass distributions of the final states of hadronic τ decay products recorded in the CLEO detector. From a fit of theoretical predictions to the measurements of spectral moments and the total hadronic decay width of the τ, we determine the strong coupling constant and a set of non-perturbative QCD parameters. The strong coupling constant is measured to be αs(mτ) = 0.306 ± 0.024, which when extrapolated to the Z mass, yields αs(Mz) = 0.114 ± 0.003.",

author = "T. Coan and J. Dominick and V. Fadeyev and I. Korolkov and M. Lambrecht and S. Sanghera and V. Shelkov and T. Skwarnicki and R. Stroynowski and I. Volobouev and G. Wei 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 F. W{\"u}rthwein and Asner, {D. M.} and M. Athanas and Bliss, {D. W.} and Brower, {W. S.} and G. Masek and Paar, {H. P.} and M. Sivertz and J. Gronberg and Korte, {C. M.} 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 D. Roberts and A. Ryd and H. Tajima and Witherell, {M. S.} and R. Balest and K. Cho and Ford, {W. T.} and M. Lohner and H. Park and P. Rankin and Smith, {J. G.} and Alexander, {J. P.} and C. Bebek and Berger, {B. E.} 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 M. Dickson and Drell, {P. S.} and Dumas, {D. J.} and R. Ehrlich and R. Elia and P. Gaidarev and Galik, {R. S.} and M. Garcia-Sciveres 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 Y. Liu 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 A. Soffer and P. Avery and A. Freyberger and K. Lingel and J. Rodriguez and S. Yang and J. Yelton and G. Brandenburg and D. Cinabro and T. Liu and M. Saulnier and R. Wilson and H. Yamamoto and T. Bergfeld and Eisenstein, {B. I.} and J. Ernst and Gladding, {G. E.} and Gollin, {G. D.} and M. Palmer and M. Selen and Thaler, {J. J.} and Edwards, {K. W.} and McLean, {K. W.} and M. Ogg and A. Bellerive and Britton, {D. I.} and Hyatt, {E. R.F.} and R. Janicek 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 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 A. Wolf and Zoeller, {M. M.} 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 L. Gibbons and Y. Kwon and S. Roberts and Thorndike, {E. H.}",

note = "Funding Information: We gratefully acknowledget he effort of the CESR staff in providing us with excellent luminosity and running conditions. JPA., J.R.P., and 1.PJ.S. thank the NY1 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., T.S., and H.Y. thank the OJI program of DOE, J.R.P thanks the A.P. Sloan Foundation, and A.W. thanks the Alexander von Humboldt Stiftung for support. This work was supportedb y the National Science Foundation, the U.S. Departmento f Energy and the Natural Sciences and Engineering Re-searchC ouncil of Canada. We especially thank F. Le Diberder of Orsay for very helpful communications and for providing the computerp rogram used to compute the theoreticalp redictions.",

year = "1995",

month = aug,

day = "24",

doi = "10.1016/0370-2693(95)00824-5",

language = "English",

volume = "356",

pages = "580--588",

journal = "Physics Letters B",

issn = "0370-2693",

number = "4",

}

Coan, T, Dominick, J, Fadeyev, V, Korolkov, I, Lambrecht, M, Sanghera, S, Shelkov, V, Skwarnicki, T, Stroynowski, R, Volobouev, I, Wei, G, 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, Würthwein, F, Asner, DM, Athanas, M, Bliss, DW, Brower, WS, Masek, G, Paar, HP, Sivertz, M, Gronberg, J, Korte, CM, Kutschke, R, Menary, S, Morrison, RJ, Nakanishi, S, Nelson, HN, Nelson, TK, Qiao, C, Richman, JD, Roberts, D, Ryd, A, Tajima, H, Witherell, MS, Balest, R, Cho, K, Ford, WT, Lohner, M, Park, H, Rankin, P, Smith, JG, Alexander, JP, Bebek, C, Berger, BE, Berkelman, K, Bloom, K, Browder, TE, Cassel, DG, Cho, HA, Coffman, DM, Crowcroft, DS, Dickson, M, Drell, PS, Dumas, DJ, Ehrlich, R, Elia, R, Gaidarev, P, Galik, RS, Garcia-Sciveres, M, Gittelman, B, Gray, SW, Hartill, DL, Heltsley, BK, Henderson, S, Jones, CD, Jones, SL, Kandaswamy, J, Katayama, N, Kim, PC, Kreinick, DL, Liu, Y, Ludwig, GS, Masui, J, Mevissen, J, Mistry, NB, Ng, CR, Nordberg, E, Patterson, JR, Peterson, D, Riley, D, Soffer, A, Avery, P, Freyberger, A, Lingel, K, Rodriguez, J, Yang, S, Yelton, J, Brandenburg, G, Cinabro, D, Liu, T, Saulnier, M, Wilson, R, Yamamoto, H, Bergfeld, T, Eisenstein, BI, Ernst, J, Gladding, GE, Gollin, GD, Palmer, M, Selen, M, Thaler, JJ, Edwards, KW, McLean, KW, Ogg, M, Bellerive, A, Britton, DI, Hyatt, ERF, Janicek, R, 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, Fulton, R, Fujino, D, Gan, KK, Honscheid, K, Kagan, H, Kass, R, Lee, J, Sung, M, White, C, Wolf, A, Zoeller, MM, 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, Gibbons, L, Kwon, Y, Roberts, S & Thorndike, EH 1995, 'Measurement of α_S from τ decays', Physics Letters B, vol. 356, no. 4, pp. 580-588. https://doi.org/10.1016/0370-2693(95)00824-5

TY - JOUR

T1 - Measurement of αS from τ decays

AU - Coan, T.

AU - Dominick, J.

AU - Fadeyev, V.

AU - Korolkov, I.

AU - Lambrecht, M.

AU - Sanghera, S.

AU - Shelkov, V.

AU - Skwarnicki, T.

AU - Stroynowski, R.

AU - Volobouev, I.

AU - Wei, G.

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 - Würthwein, F.

AU - Asner, D. M.

AU - Athanas, M.

AU - Bliss, D. W.

AU - Brower, W. S.

AU - Masek, G.

AU - Paar, H. P.

AU - Sivertz, M.

AU - Gronberg, J.

AU - Korte, C. M.

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 - Roberts, D.

AU - Ryd, A.

AU - Tajima, H.

AU - Witherell, M. S.

AU - Balest, R.

AU - Cho, K.

AU - Ford, W. T.

AU - Lohner, M.

AU - Park, H.

AU - Rankin, P.

AU - Smith, J. G.

AU - Alexander, J. P.

AU - Bebek, C.

AU - Berger, B. E.

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 - Dickson, M.

AU - Drell, P. S.

AU - Dumas, D. J.

AU - Ehrlich, R.

AU - Elia, R.

AU - Gaidarev, P.

AU - Galik, R. S.

AU - Garcia-Sciveres, M.

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 - Liu, Y.

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 - Soffer, A.

AU - Avery, P.

AU - Freyberger, A.

AU - Lingel, K.

AU - Rodriguez, J.

AU - Yang, S.

AU - Yelton, J.

AU - Brandenburg, G.

AU - Cinabro, D.

AU - Liu, T.

AU - Saulnier, M.

AU - Wilson, R.

AU - Yamamoto, H.

AU - Bergfeld, T.

AU - Eisenstein, B. I.

AU - Ernst, J.

AU - Gladding, G. E.

AU - Gollin, G. D.

AU - Palmer, M.

AU - Selen, M.

AU - Thaler, J. J.

AU - Edwards, K. W.

AU - McLean, K. W.

AU - Ogg, M.

AU - Bellerive, A.

AU - Britton, D. I.

AU - Hyatt, E. R.F.

AU - Janicek, R.

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 - 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 - Wolf, A.

AU - Zoeller, M. M.

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 - Gibbons, L.

AU - Kwon, Y.

AU - Roberts, S.

AU - Thorndike, E. H.

N1 - Funding Information: We gratefully acknowledget he effort of the CESR staff in providing us with excellent luminosity and running conditions. JPA., J.R.P., and 1.PJ.S. thank the NY1 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., T.S., and H.Y. thank the OJI program of DOE, J.R.P thanks the A.P. Sloan Foundation, and A.W. thanks the Alexander von Humboldt Stiftung for support. This work was supportedb y the National Science Foundation, the U.S. Departmento f Energy and the Natural Sciences and Engineering Re-searchC ouncil of Canada. We especially thank F. Le Diberder of Orsay for very helpful communications and for providing the computerp rogram used to compute the theoreticalp redictions.

PY - 1995/8/24

Y1 - 1995/8/24

N2 - We present measurements of spectral moments extracted from the invariant mass distributions of the final states of hadronic τ decay products recorded in the CLEO detector. From a fit of theoretical predictions to the measurements of spectral moments and the total hadronic decay width of the τ, we determine the strong coupling constant and a set of non-perturbative QCD parameters. The strong coupling constant is measured to be αs(mτ) = 0.306 ± 0.024, which when extrapolated to the Z mass, yields αs(Mz) = 0.114 ± 0.003.

AB - We present measurements of spectral moments extracted from the invariant mass distributions of the final states of hadronic τ decay products recorded in the CLEO detector. From a fit of theoretical predictions to the measurements of spectral moments and the total hadronic decay width of the τ, we determine the strong coupling constant and a set of non-perturbative QCD parameters. The strong coupling constant is measured to be αs(mτ) = 0.306 ± 0.024, which when extrapolated to the Z mass, yields αs(Mz) = 0.114 ± 0.003.

UR - http://www.scopus.com/inward/record.url?scp=4244100798&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(95)00824-5

DO - 10.1016/0370-2693(95)00824-5

M3 - Article

AN - SCOPUS:4244100798

SN - 0370-2693

VL - 356

SP - 580

EP - 588

JO - Physics Letters B

JF - Physics Letters B

IS - 4

ER -

Measurement of α_S from τ decays

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