Measurement of α_S from τ decays

Coan, T. et al. (1995) Measurement of α_S from τ decays. Physics Letters B, 356(4), pp. 580-588. (doi: 10.1016/0370-2693(95)00824-5)

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.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Britton, Professor David
• Authors: 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., Mukhin, Y., Playfer, S., Rozen, Y., Stone, S., Xing, X., Zhu, G., Bartelt, J., Csorna, S.E., Egyed, Z., Jain, V., Gibaut, D., Kinoshita, K., Pomianowski, P., Barish, B., Chadha, M., Chan, S., Cowen, D.F., Eigen, G., Miller, J.S., O'Grady, C., Urheim, J., Weinstein, A.J., Würthwein, F., Asner, D.M., Athanas, M., Bliss, D.W., Brower, W.S., Masek, G., Paar, H.P., Sivertz, M., Gronberg, J., Korte, C.M., Kutschke, R., Menary, S., Morrison, R.J., Nakanishi, S., Nelson, H.N., Nelson, T.K., Qiao, C., Richman, J.D., Roberts, D., Ryd, A., Tajima, H., Witherell, M.S., Balest, R., Cho, K., Ford, W.T., Lohner, M., Park, H., Rankin, P., Smith, J.G., Alexander, J.P., Bebek, C., Berger, B.E., Berkelman, K., Bloom, K., Browder, T.E., Cassel, D.G., Cho, H.A., Coffman, D.M., Crowcroft, D.S., Dickson, M., Drell, P.S., Dumas, D.J., Ehrlich, R., Elia, R., Gaidarev, P., Galik, R.S., Garcia-Sciveres, M., Gittelman, B., Gray, S.W., Hartill, D.L., Heltsley, B.K., Henderson, S., Jones, C.D., Jones, S.L., Kandaswamy, J., Katayama, N., Kim, P.C., Kreinick, D.L., Liu, Y., Ludwig, G.S., Masui, J., Mevissen, J., Mistry, N.B., Ng, C.R., Nordberg, E., Patterson, J.R., 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, B.I., Ernst, J., Gladding, G.E., Gollin, G.D., Palmer, M., Selen, M., Thaler, J.J., Edwards, K.W., McLean, K.W., Ogg, M., Bellerive, A., Britton, D.I., Hyatt, E.R.F., Janicek, R., MacFarlane, D.B., Patel, P.M., Spaan, B., Sadoff, A.J., 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, J.K., Patton, S., Poling, R., Savinov, V., Schrenk, S., Wang, R., Alam, M.S., Kim, I.J., Ling, Z., Mahmood, A.H., O'Neill, J.J., Severini, H., Sun, C.R., Wappler, F., Crawford, G., Fulton, R., Fujino, D., Gan, K.K., Honscheid, K., Kagan, H., Kass, R., Lee, J., Sung, M., White, C., Wolf, A., Zoeller, M.M., Fu, X., Nemati, B., Ross, W.R., Skubic, P., Wood, M., Bishai, M., Fast, J., Gerndt, E., Hinson, J.W., McIlwain, R.L., Miao, T., Miller, D.H., Modesitt, M., Payne, D., Shibata, E.I., Shipsey, I.P.J., Wang, P.N., Gibbons, L., Kwon, Y., Roberts, S., and Thorndike, E.H.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physics Letters B
• Publisher: Elsevier BV
• ISSN: 0370-2693