|
|||||
|
|
Observation of Upsilon(3S)-->tau+tau- and tests of lepton universality in Upsilon decays |
|
| Authors: | Besson D Pedlar T K Cronin-Hennessy D Gao K Y Gong D T Hietala J Kubota Y Klein T Lang B W Poling R Scott A W Smith A Zweber P Dobbs S Metreveli Z Seth K K Tomaradze A Ernst J Severini H Dytman S A Love W Savinov V Aquines O Li Z Lopez A Mehrabyan S Mendez H Ramirez J Huang G S Miller D H Pavlunin V Sanghi B Shipsey I P J Xin B Adams G S Anderson M Cummings J P Danko I Napolitano J He Q Insler J Muramatsu H Park C S Thorndike E H Yang F Coan T E Gao Y S Liu F Artuso M Blusk S Butt J Horwitz N Li J Menaa N Mountain R Nisar S Randrianarivony K Redjimi R Sia R Skwarnicki T Stone S Wang J C |
| Institution: | University of Kansas, Lawrence, Kansas 66045, USA. |
| Abstract: | Using data collected with the CLEO III detector at the CESR e+e- collider, we report on a first observation of the decay Upsilon(3S)-->tau+tau-, and precisely measure the ratio of branching fractions of Upsilon(nS), n=1, 2, 3, to tau+tau- and mu+mu- final states, finding agreement with expectations from lepton universality. We derive absolute branching fractions for these decays, and also set a limit on the influence of a low mass CP-odd Higgs boson in the decay of the Upsilon(1S). |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ | |