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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 張寶棣(Paoti Chang) | |
| dc.contributor.author | Chia-Ying Lin | en |
| dc.contributor.author | 林佳縈 | zh_TW |
| dc.date.accessioned | 2021-06-13T04:11:22Z | - |
| dc.date.available | 2007-07-28 | |
| dc.date.copyright | 2006-07-28 | |
| dc.date.issued | 2006 | |
| dc.date.submitted | 2006-07-25 | |
| dc.identifier.citation | Bibliography
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/32534 | - |
| dc.description.abstract | 本篇論文中有兩個主題，第一個主題是利用Ｄ→Ｋπ和Ｄ→Ｋππ0這兩個衰變過程來量測π0粒子在真實數據與模擬數據間相對性的重建效率，第二個主題則是尋找Ｂ介子到不可見粒子的稀有衰變，其衰變分率上限為22×10-5。
本篇論文所使用的數據是由位於日本國家高能加速器中心Ｂ介子工廠(KEKB)的Belle偵測器由不對稱能量的正負電子對撞所得。 | zh_TW |
| dc.description.abstract | There are two topics in this thesis. The first one is the study of the relativeπ0 reconstruction efficiency between data and Monte-Carlo using D →Kπ and D→Kππ0 The other is search result for B0 decays to invisible with one fully reconstructed B meson in the final state. This study is based on a large data sample recorded on the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-13T04:11:22Z (GMT). No. of bitstreams: 1 ntu-95-R93222021-1.pdf: 10157893 bytes, checksum: 440f401f6f63b637e9b31516cac65b3e (MD5) Previous issue date: 2006 | en |
| dc.description.tableofcontents | Contents
1 Introduction 1 1.1 The Standard Model . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 CP violation . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 The CKM matrix . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 The Belle Experiment 4 2.1 The KEKB Accelerator . . . . . . . . . . . . . . . . . . . . . . 4 2.2 The Belle Detector . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2.1 Beam pipe and Silicon Vertex Detector (SVD) . . . . . 6 2.2.2 Extreme Forward Calorimeter (EFC) . . . . . . . . . . 7 2.2.3 Central Drift Chamber (CDC) . . . . . . . . . . . . . . 7 2.2.4 Aerogel Cherenkov Counter system (ACC) . . . . . . . 8 2.2.5 Time of Flight counters (TOF) . . . . . . . . . . . . . 9 2.2.6 Electromagnetic Calorimeter (ECL) . . . . . . . . . . . 9 2.2.7 KL and Muon Detector (KLM) . . . . . . . . . . . . . 10 2.3 Particle Identification (PID) . . . . . . . . . . . . . . . . . . . 10 2.3.1 Kaon and Pion Identification . . . . . . . . . . . . . . 11 2.3.2 Electron Identification . . . . . . . . . . . . . . . . . . 11 2.3.3 Muon Identification . . . . . . . . . . . . . . . . . . . . 12 3 Study of π0 efficiency 13 3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 3.2 Event selection and Reconstruction . . . . . . . . . . . . . . . 15 3.3 Correction Factor . . . . . . . . . . . . . . . . . . . . . . . . . 17 3.3.1 Total rate correction . . . . . . . . . . . . . . . . . . . 17 3.3.2 Kaon ID and Pion ID efficiency . . . . . . . . . . . . . 19 3.3.3 Interference effect . . . . . . . . . . . . . . . . . . . . . 19 3.4 Fitted results . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.5 Systematic uncertainties . . . . . . . . . . . . . . . . . . . . . 22 3.6 Result of π0 systematics using D decay . . . . . . . . . . . . . 24 3.7 Scale factor using ηdecay . . . . . . . . . . . . . . . . . . . 27 3.8 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 4 Search for B decays to invisible final states 34 4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 4.2 Data sample . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 4.3 Event selection . . . . . . . . . . . . . . . . . . . . . . . . . . 36 4.4 Estimation of signal and background . . . . . . . . . . . . . . 39 4.5 Control Sample . . . . . . . . . . . . . . . . . . . . . . . . . . 41 4.6 Systematic uncertainties . . . . . . . . . . . . . . . . . . . . . 41 4.6.1 Uncertainty of NB0B0 with one reconstructed B . . . . 43 4.6.2 Uncertainty of the selection efficiency . . . . . . . . . . 43 4.7 Result . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 A Search for B→K*νν A.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 A.2 Data sample . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 A.3 Event selection . . . . . . . . . . . . . . . . . . . . . . . . . . 49 A.4 Estimation of signal and background . . . . . . . . . . . . . . 50 A.5 Control Sample . . . . . . . . . . . . . . . . . . . . . . . . . . 55 A.6 Systematic uncertainties . . . . . . . . . . . . . . . . . . . . . 57 A.7 Result . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 A.8 Result of tight cut . . . . . . . . . . . . . . . . . . . . . . . . 63 A.9 Conclusions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 A.10 Event display . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 A.11 Event display . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 A.11.1 ExpNo. 7, RunNo. 895, EvtNo. 1296067 . . . . . . . . 69 A.11.2 ExpNo. 41, RunNo. 1019, EvtNo. 6328924 . . . . . . . 69 A.11.3 ExpNo. 43, RunNo. 4, EvtNo. 3870356 . . . . . . . . . 70 A.11.4 ExpNo. 43, RunNo 424., EvtNo. 4803757 (K*γ candidate) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 | |
| dc.language.iso | en | |
| dc.title | 量測π0粒子重建效率與尋找Ｂ介子衰變至不可見的粒子 | zh_TW |
| dc.title | Study of π0 efficiency and Search for B0 decays to invisible final states at Belle | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 94-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 郭榮升(Rurng-sheng Guo),王名儒(Min-Zu Wang),侯維恕(Wei-Shu Hou) | |
| dc.subject.keyword | π0重建效率, | zh_TW |
| dc.subject.keyword | π0 efficiency,invisible final states, | en |
| dc.relation.page | 84 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2006-07-26 | |
| dc.contributor.author-college | 理學院 | zh_TW |
| dc.contributor.author-dept | 物理研究所 | zh_TW |
| 顯示於系所單位： | 物理學系 | |
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