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arXiv 0911.2639physics.ins-det
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2004年ATLAS组合束实验中π介子能量刻度的层相关技术

A Layer Correlation Technique for Pion Energy Calibration at the 2004 ATLAS Combined Beam Test

Karl-Johan Grahn

摘要:

本文提出了一种标定分段式量热计强子响应的新方法。它是基于主成分分析的热量计层能量存款,利用纵向簇射发展信息,以提高测量的能量分辨率。用Geant 4 Monte Carlo模拟事件计算了ATLAS量能器前和量能器之间的不可见强子能量和死物质中损失的能量的修正,并用于重建2004年CERN H8地区桶组合束试验期间撞击量能器的π介子能量。对于能量在20 - 180 GeV之间的π介子束,粒子能量在3%以内被重构,能量分辨率比电磁尺度提高了约20%。

英文摘要:

A new method for calibrating the hadron response of a segmented calorimeter is developed. It is based on a principal component analysis of the calorimeter layer energy deposits, exploiting longitudinal shower development information to improve the measured energy resolution. Corrections for invisible hadronic energy and energy lost in dead material in front of and between the ATLAS calorimeters were calculated with simulated Geant4 Monte Carlo events and used to reconstruct the energy of pions impinging on the calorimeters during the 2004 Barrel Combined Beam Test at the CERN H8 area. For pion beams with energies between 20 and 180 GeV, the particle energy is reconstructed within 3% and the energy resolution is improved by about 20% compared to the electromagnetic scale.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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