Precise Measurement of τ Mass

BES Collaboration

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《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 1995, Vol. 19> Issue(2) : 97-105

Precise Measurement of τ Mass

BES Collaboration

Institute of High Enerty Physics, Acadamia Scinica, Beijing 100039

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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.

References

[1]	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.

[1]	BES Collaboration . Measurement of Inclusive Semileptonic Branching Fractions for D^－→e^－X and D⁰→e^－X. Chinese Physics C, 2002, 26(6): 547-556.
[2]	LIU Yong-Ying , WANG Su-Fang , DUAN Li-Min , JIN Gen-Ming , ZHU Hai-Dong , ZHANG Bao-Guo , WEN Wan-Xin , LI Zu-Yu , HE Zhi-Yong , WANG Hong-Wei , XIAO Zhi-Gang , WU He-Yu , WEI Zhi-Yong . Emission Time of Light Particles with Respect to Measurement Angle. Chinese Physics C, 2001, 25(11): 1065-1070.
[3]	HE Ze-Jun , Zhou Wen-Jie , JIANG Wei-Zhou , ZHU Zhi-Yuan , LIU Bo . Enhancement of Dileptons with Intermediate Masses Produced in QGP. Chinese Physics C, 2001, 25(2): 179-182.
[4]	Qian Chengde , Feng Sheng , Tong Guoliang , Wu Yigen . Electron Identification in the Measurement of MichelParameter in τ Lepton Decay. Chinese Physics C, 1998, 22(5): 388-392.
[5]	He Zejun . Characteristic Dilepton Distribution for Quark-Gluon Matter. Chinese Physics C, 1997, 21(3): 269-274.
[6]	Liu Yaoyang , Jiang Xiangdong , Zhou Jiange . A Quark Model Including Lepton Structure. Chinese Physics C, 1996, 20(10): 900-912.
[7]	BES Collaboration . Determination of J/ψ Leptonic Branching Fraction Via ψ(2S)→π⁺π^－J/ψ. Chinese Physics C, 1996, 20(2): 97-106.
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BES Collaboration. Precise Measurement of τ Mass[J]. Chinese Physics C, 1995, 19(2): 97-105.

BES Collaboration. Precise Measurement of τ Mass[J]. Chinese Physics C, 1995, 19(2): 97-105. shu

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Received: 1900-01-01
Revised: 1900-01-01

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Precise Measurement of τ Mass

BES Collaboration

Institute of High Enerty Physics, Acadamia Scinica, Beijing 100039

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1995-02-05

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.