Study of anaysis methods using a new detector simulator in ATLAS

使用 ATLAS 中的新型探测器模拟器进行分析方法的研究

基本信息

批准号：
11694102
负责人：
AMAKO Katsuya
金额：
$ 5.63万
依托单位：
High Energy Accelerator Researcgh Organization(KEK)
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

项目摘要

The purpose of this study is to design and implement the full detector simulator, which will be base to develop algorithms for physic analysis of the LHC ATLAS experiment. We used the Geant4 toolkit - a new tool to construct a detector simulator in high energy physics - to implement the simulator. The major effort of the study is to prove the validity of physics processes in Geant4 using ATLAS test beam data. In 1999, we studied the validity of electromagnetic show processes using test beam data of the ATLAS electromagnetic calorimeters. In 2000, we studied validity of muon interactions and hadronic shower processes in Geant4 using the ATLAS muon detector and hadron calorimeters. The basic procedure of validation is same for the first and second studies. We designed and implemented first the raw data format of test beam data. Based on this data format, we stored test beam data into a database. Then we installed geometry information and particle responses of the detectors into ATLAS det … More ector simulator. Using this simulator we performed mass productions of data which simulate the response of electrons/pions/muons in the detectors. Simulated data thus created were analyzed as though they were raw data. We calculated energy loss distributions, energy resolution of calorimeter, multiple particle distributions, etc using there simulated data and compared them with the results obtained from the teat beam data (real data). We proved that the energy loss distributions and energy resolution of the electromagnetic calorimeters were well reproduced by the simulator. Concerning the muon response, we provided that the energy loss distributions and the multiple particle distributions obtained from simulated data are consistent with ones measured by the experiments. In the study of hadronic shower process, we proved that the simulation reproduces the energy loss distributions when we take into account the electric noise contribution to the raw data. However, the energy resolution calculated by the simulation is worse than the raw data. We are still studying this problem. Less

本研究的目的是设计和实现完整的探测器模拟器，这将成为开发 LHC ATLAS 实验物理分析算法的基础。我们使用 Geant4 工具包（一种构建高能物理探测器模拟器的新工具）。该研究的主要工作是使用 ATLAS 测试波束数据证明 Geant4 中物理过程的有效性。1999 年，我们使用测试波束数据研究了电磁显示过程的有效性。 2000 年，我们使用 ATLAS μ 子探测器和强子量热器研究了 Geant4 中 μ 子相互作用和强子簇射过程的有效性。测试光束数据的原始数据格式基于此数据格式，我们将测试光束数据存储到数据库中，然后将探测器的几何信息和粒子响应安装到 ATLAS det 中。使用该模拟器，我们进行了模拟探测器中电子/介子/μ介子响应的数据的批量生产，并像原始数据一样对它们进行了分析。使用模拟数据进行了多粒子分布等，并将它们与从奶嘴束数据（真实数据）获得的结果进行了比较，我们证明了电磁量热仪的能量损失分布和能量分辨率得到了很好的再现。关于μ子响应，我们发现从模拟数据中获得的能量损失分布和多粒子分布与实验测量的一致，在强子簇射过程的研究中，我们证明了模拟再现了能量。当我们考虑到原始数据的电噪声贡献时的损耗分布但是，通过模拟计算的能量分辨率比原始数据差。我们仍在研究这个问题。