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Abstract:
Pairs of τ lepton produced near the threshould have been studied in eμ,ee,eπ,μμ,μπ,ππ final states with the data taken by BES detector at BEPC collider in 1992.The obtained τ mass is MeV by fitting data with likelihood method.
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References
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BES合作组,高能物理与核物理,16(1992)865.[2]Measurement of the Mass of #964; lepton,BES collab,Phys.Rev.Lett.,69(1992)3021.[3]Review of Particle Properties,PDG.Phys.Rev.,D45(1993).[4]Experimental Results on #964; physics,J.J.Gomez Cadenas,CERN-PPE/94-B,1994.
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