SEARCH FOR EXCITED TAUS FROM Z-DECAYS

被引：20

作者：

ADEVA, B

机构：

[1] European Laboratory for Particle Physics, CERN

[2] INFN - Sezione di Firenze, University of Firenze

[3] Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas, CIEMAT

[4] Johns Hopkins University, Baltimore

[5] INFN - Sezione di Napoli, University of Naples

[6] Northeastern University, Boston

[7] World Laboratory, FBLJA Project

[8] Eidgenössische Technische Hochschule, ETH Zürich

[9] Massachussetts Institute of Technology, Cambridge

[10] Leningrad Nuclear Physics Institute

[11] Central Laboratory of Automation and Instrumentation, CLANP, Sofia

[12] INFN - Sezione di Bologna

[13] Institute of Theoretical and Experimental Physics, ITEP

[14] University of Michigan, Ann Arbor

[15] Tata Institute of Fundamental Research, Bombay

[16] INFN - Sezione di Roma, University of Rome La Sapienza

[17] Princeton University, Princeton

[18] Union College, Schenectady

[19] University of Geneva

[20] Laboratoire de Physique des Particules, LAPP

[21] Central Research Institute for Physics, the Hungarian Academy of Sciences

[22] NIKHEF-H, University of Nijmegen

[23] Paul Scherrer Institut (PSI), Würenlingen

[24] University of Lausanne

[25] University of California, San Diego

[26] Carnegie Mellon University, Pittsburgh

[27] Institut de Physique Nucléaire de Lyon, IN2P3-CNRS/Université CaludeBernard

[28] Purdue University, West Lafayette

[29] University of Alabama, Tuscaloosa

[30] Institute of High Energy Physics, IHEP, Beijing

[31] California Institute of Technology, Pasadena

[32] High Energy Physics Institute, Berlin

[33] Shanghai Institute of Ceramics, SIC, Shanghai

[34] Harvard University, Cambridge

[35] University of Hamburg

来源：

PHYSICS LETTERS B | 1990年 / 250卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(90)91178-E

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have searched for excited taus from Z 0 decay in the channels e + e - → τ *+ τ *- → τ + τ - γ γ and e + e - → ττ * → τ + τ - γ, using the L3 detector at LEP. Using the τ * pair production channel, we can exclude a τ * up to a mass of 45.5 geV at 95% confidence level. We have also determined upper limits on the ττ * Z 0 and ττ * γ couplings as a function of m τ* up to 89.3 GeV. © 1990.

引用

页码：205 / 211

页数：7

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