高能物理实验装置模拟---GEANT入门.ppt
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1、2019/11/5,Weilin Yu QCD和轻强子暑期班,1,The Pentaquark Q+ Search At Hermes,Weilin Yu (Peking University),for Hermes Collaboration,2019/11/5,Weilin Yu QCD和轻强子暑期班,2,Outline,Particle IdentificationSearch For pKS ResonanceSystematic StudiesSummary and Conclusions,2019/11/5,Weilin Yu QCD和轻强子暑期班,3,The HERMES Exp
2、eriment,2019/11/5,Weilin Yu QCD和轻强子暑期班,4,The HERMES Spectrometer,2019/11/5,Weilin Yu QCD和轻强子暑期班,5,Particle Identification,2019/11/5,Weilin Yu QCD和轻强子暑期班,6,What is a Pentaquark Q+,2019/11/5,Weilin Yu QCD和轻强子暑期班,7,Event Reconstruction,2019/11/5,Weilin Yu QCD和轻强子暑期班,8,Identification,after all cuts,2019
3、/11/5,Weilin Yu QCD和轻强子暑期班,9,Results,Unbinned fit is used: result independent of bin size and starting point,Peak at:M= 1528 2.6 MeV= 8 2 MeVSignificance: 3.7,2019/11/5,Weilin Yu QCD和轻强子暑期班,10,The Signal and its Background,Peak at:1527 2.3 MeV= 9.2 2 MeVSignificance: 4.3,2019/11/5,Weilin Yu QCD和轻强子暑
4、期班,11,Observed width FWHM: 19 24 MeV Detector resolution (from MC) FWHM: 10 14.6 MeV re-fit spectra with Breit-Wigner convoluted with a Gaussian (fixed by MC) HERMES intrinsic width: = 17 9 3 MeV,A Non-Zero Width for Q+?,2019/11/5,Weilin Yu QCD和轻强子暑期班,12,Well established L(1520) pK- with acceptance:
5、1.5% No peak structure for Q+ pK+ zero counts at 91% CL Q+ not isotensor probably isoscalar,Q+ Isospin,2019/11/5,Weilin Yu QCD和轻强子暑期班,13,Summary of Positive Results,2019/11/5,Weilin Yu QCD和轻强子暑期班,14,Summary of Null Results,2019/11/5,Weilin Yu QCD和轻强子暑期班,15,check for kinematical reflections detector
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- 高能物理 实验 试验 装置 模拟 摹拟 geant 入门
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