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"Table 4" of "Cross-sections and leptonic forward-backward asymmetries from the Z0 running of LEP."

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Mendeley Data2024-06-25 更新2024-06-27 收录
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CERN-LEP. Measurement of the cross sections and forward-backward asymmetries of lepton pair production in E+ E- interactions around the Z0 peak. The data come from the energy scan during the 1993-1995 LEP running period where the energies were 1.76 GeV below and above the Z0 peak (in addition to at the peak) and the 1994 single energy run near the Z0 peak. In addition the dimuon events with a photon radiated in the initial state (ISR data) have been used to probe cross sections and asymmetries down to PETRA energies. Model independent fits to all DELPHI lineshape and asymmetry data from 1990 to 1995 give the following values of the resonance parameters. MZ = 91.1863 +- 0.0028 GeV. Gamma Z = 2.4876 +- 0.0041 GeV. SIGMA0 = 41.578 +- 0.069 nb. Rl = 20.730 +- 0.060. ASYM0(NAME=AFB) = 0.0187 +- 0.0019.

欧洲核子研究组织(CERN)大型电子正电子对撞机(Large Electron Positron Collider, LEP)数据集:Z⁰玻色子峰附近正负电子(e⁺e⁻)相互作用中轻子对产生的截面与前后不对称性测量。本数据集采用1993-1995年LEP运行周期内的能量扫描数据,其中对撞能量分别位于Z⁰峰上下1.76 GeV处(包含峰位本身),以及1994年一次在Z⁰峰附近的单能量运行数据。此外,本研究还利用初态辐射(Initial State Radiation, ISR)的双μ子事件数据,将截面与不对称性的探测范围拓展至正电子电子环形加速器(Positron Electron Ring Accelerator, PETRA)能区。通过对1990至1995年间所有德尔斐探测器(DELPHI)的线形谱与不对称性数据开展模型无关拟合,得到如下共振参数: M_Z = 91.1863 ± 0.0028 GeV; Γ_Z = 2.4876 ± 0.0041 GeV; σ₀ = 41.578 ± 0.069 nb; R_l = 20.730 ± 0.060; ASYM0(NAME=AFB) = 0.0187 ± 0.0019。
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2023-06-28
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