Application of the parametric formulae for electromagnetic showers in unconverted gamma/pi(0) discrimination
文献类型：期刊论文
| 作者 | Tao JQ(陶军全) ; Chen GM(陈国明); Yang M(杨民); Bian JG(卞建国); Li ZH(李祖豪); Liang S(梁松); Meng XW(孟祥伟); Tang ZC(唐志成); Wang J(王健); Wang Z(王征)
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| 刊名 | CHINESE PHYSICS C
 |
| 出版日期 | 2011 |
| 卷号 | 35期号:3页码:#REF! |
| 关键词 | electromagnetic shower parametric formulae gamma/pi(0) discrimination |
| 通讯作者 | Tao, JQ (reprint author), Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China. |
| 英文摘要 | In the LHC experiment, the neutral pions produced during jet fragmentation are the background sources for all physics channels with high-energy photons in their final state. In this paper, the application of the three-dimensional parametric formula for electromagnetic (EM) showers, which we developed in the Alpha Magnetic Spectrometer II experiment, is presented to distinguish the unconverted photons from the neutral pions. With the constructed electromagnetic calorimeter (ECAL) in a GEANT4 simulation, the parametric formulae were validated and the unconverted gamma/pi(0) discrimination was performed with the Toolkit for Multivariate Data Analysis (TMVA) package in ROOT for different transverse energies ranging from 15 GeV to 75 GeV, which is the most sensitive region for light Higgs (with mass similar to 120 GeV) searches with the channel H -> gamma gamma. With this discrimination method and the selected transverse energy region, we can reject pi(0) with the efficiency from similar to 40% (65-75 GeV) to similar to 90% (15-25 GeV) when keeping 90% gamma efficiency. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Nuclear ; Physics, Particles & Fields |
| 收录类别 | SCI |
| WOS记录号 | WOS:000287952400011 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/227306]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 推荐引用方式 GB/T 7714 | Tao JQ,Chen GM,Yang M,et al. Application of the parametric formulae for electromagnetic showers in unconverted gamma/pi(0) discrimination[J]. CHINESE PHYSICS C,2011,35(3):#REF!. |
| APA | 陶军全.,陈国明.,杨民.,卞建国.,李祖豪.,...&Zhang, ZX.(2011).Application of the parametric formulae for electromagnetic showers in unconverted gamma/pi(0) discrimination.CHINESE PHYSICS C,35(3),#REF!. |
| MLA | 陶军全,et al."Application of the parametric formulae for electromagnetic showers in unconverted gamma/pi(0) discrimination".CHINESE PHYSICS C 35.3(2011):#REF!. |
入库方式： OAI收割
来源：高能物理研究所
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