Measurement of the mass of the [tau] lepton

The mass of the [tau] lepton has been measured at the Beijing Electron-Positron Collider using the Beijing Spectrometer. A search near threshold for [ital e][sup +][ital e[minus]][r arrow][tau][sup +][tau][sup [minus]] was performed. Candidate events were identified by requiring that one [tau] decay...

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Veröffentlicht in:	Physical review letters 1992-11, Vol.69:21
Hauptverfasser:	Bai, J.Z., Bardon, O., Becker-Szendy, R.A., Burnett, T.H., Campbell, J.S., Chen, S.J., Chen, S.M., Chen, Y.Q., Cheng, Z.D., Coller, J.A., Cowan, R.F., Cui, H.C., Cui, X.Z., Ding, H.L., Du, Z.Z., Dunwoodie, W., Fang, C., Fero, M.J., Gao, M.L., Gao, S.Q., Gao, W.X., Gao, Y.N., Gu, J.H., Gu, S.D., Gu, W.X., Guo, Y.N., Guo, Y.Y., Han, Y., Hatanaka, M., He, J., Hitlin, D.G., Hu, G.Y., Hu, T., Huang, D.Q., Huang, Y.Z., Izen, J.M., Jia, Q.P., Jiang, C.H., Jiang, Z.J., Johnson, A.S., Jones, L.A., Kelsey, M.H., Lai, Y.F., Lang, P.F., Lankford, A., Li, F., Li, J., Li, P.Q., Li, Q.M., Li, R.B., Li, W., Li, W.D., Li, W.G., Li, Y.S., Lin, S.Z., Liu, H.M., Liu, Q., Liu, R.G., Liu, Y., Lowery, B., Lu, J.G., Ma, D.H., Ma, E.C., Ma, J.M., Mandelkern, M., Marsiske, H., Mao, H.S., Mao, Z.P., Meng, X.C., Ni, H.L., Pan, L.J., Panetta, J.H., Porter, F.C., Prabhakar, E.N., Qi, N.D., Que, Y.K., Quigley, J., Rong, G., Schmid, B., Schultz, J., Shank, J.T., Shao, Y.Y., Shen, D.L., Sheng, H.Y., Shi, H.Z., Smith
Format:	Artikel
Sprache:	eng
Schlagworte:	662310 - Weak & Electromagnetic Interactions of Leptons- (1992-) 662430 - Properties of Leptons- (1992-) ANNIHILATION BASIC INTERACTIONS BRANCHING RATIO CROSS SECTIONS DATA DECAY ELECTROMAGNETIC INTERACTIONS ELECTRON-POSITRON INTERACTIONS ELEMENTARY PARTICLES ERRORS EXPERIMENTAL DATA FERMIONS HEAVY LEPTONS INFORMATION INTERACTIONS LEPTON-LEPTON INTERACTIONS LEPTONIC DECAY LEPTONS MASS MUONS NUMERICAL DATA PARTICLE DECAY PARTICLE INTERACTIONS PHYSICS OF ELEMENTARY PARTICLES AND FIELDS POSTULATED PARTICLES TAU PARTICLES WEAK INTERACTIONS WEAK PARTICLE DECAY
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Zusammenfassung:	The mass of the [tau] lepton has been measured at the Beijing Electron-Positron Collider using the Beijing Spectrometer. A search near threshold for [ital e][sup +][ital e[minus]][r arrow][tau][sup +][tau][sup [minus]] was performed. Candidate events were identified by requiring that one [tau] decay via [tau][r arrow][ital e][nu][bar [nu]], and the other via [tau][r arrow][mu][nu][bar [nu]]. The mass value, obtained from a fit to the energy dependence of the [tau][sup +][tau][sup [minus]] cross section, is [ital m][sub [tau]]=1776.9[sub [minus]0.5][sup +0.4][plus minus]0.2 MeV.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.69.3021