Z<SUP>0</SUP> Data Analysis in L3 Cosmic-Ray Experiment

LIU Zhen-An

Chinese Physics C> 2003, Vol. 27> Issue(5) : 395-398

Z⁰ Data Analysis in L3 Cosmic-Ray Experiment

LIU Zhen-An ^,

Institute of High Energy Physics,CAS,Beijing 100039,China

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Abstract：
The μ pair decayed from Z⁰ is a good means to check the quality of reconstruction program in L3 Cosmic experiment. This paper describes the method of selecting Z⁰→μ⁺μ^－events from data sample recorded during April,May,August and September,2000 when the LEP was running at Z⁰ energy.The momentum resolution of (5.47±0.25)% for 45 GeV muon is obtained.

References

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. Baehr J.et al.Precision Measurement of the Cosmic Ray Muon Momentum Spectrum Between 20 and 2000 GeV/c,July 1996,L3 internal Note No.1977 2. L3 Collab.Nucl.Instr.And Meth.,1990,A289;35 3. LIU Zhen-An,CHEN Guo-Ming et al.High Energy Phys.and Nucle.Phys.,1998,22:990(in Chinese)(刘振安,陈国明等.高能物理与核物理,1998,22:900) 4. CHEN Guo-Ming,CHEN Gang.High Energy Phys.and Nucl.Phys.,1995,19:692(in Chinese)(陈国明,刚.物理与核物理，1995,19:692)

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LIU Zhen-An. Z⁰ Data Analysis in L3 Cosmic-Ray Experiment[J]. Chinese Physics C, 2003, 27(5): 395-398.

LIU Zhen-An. Z⁰ Data Analysis in L3 Cosmic-Ray Experiment[J]. Chinese Physics C, 2003, 27(5): 395-398. shu

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Received: 2002-08-12
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Z⁰ Data Analysis in L3 Cosmic-Ray Experiment

LIU Zhen-An ^,

Corresponding author: LIU Zhen-An,

Institute of High Energy Physics,CAS,Beijing 100039,China

Received Date: 2002-08-12
Accepted Date: 1900-01-01
Available Online: 2003-05-05

Abstract: The μ pair decayed from Z⁰ is a good means to check the quality of reconstruction program in L3 Cosmic experiment. This paper describes the method of selecting Z⁰→μ⁺μ^－events from data sample recorded during April,May,August and September,2000 when the LEP was running at Z⁰ energy.The momentum resolution of (5.47±0.25)% for 45 GeV muon is obtained.