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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 張寶棣(Pao-Ti Chang) | |
| dc.contributor.author | Lian-Sheng Tsai | en |
| dc.contributor.author | 蔡連勝 | zh_TW |
| dc.date.accessioned | 2021-06-16T22:57:11Z | - |
| dc.date.available | 2020-03-03 | |
| dc.date.copyright | 2020-03-03 | |
| dc.date.issued | 2020 | |
| dc.date.submitted | 2020-02-26 | |
| dc.identifier.citation | Heavy Flavor Averaging Group. Averages of b-hadron properties at the end of 2006.2007. arXiv: 0704.3575 [hep-ex] (cit. on p. 13).
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/64672 | - |
| dc.description.abstract | 本研究利用大強子對撞機上的緊湊緲子線圈偵測器測量LambdaB->Jpsi pK
衰變通道對 LambdaB->Jpsi Lambda0 衰變通道的分支分數比。 此次實驗分析中心能量為十三兆電子伏特與 35.798 逆飛靶恩等效累積光度數據量的質子與質子對撞結果回報 測量到的分支分數比為： Br(LambdaB->Jpsi pK+) ------------------------------------------- = 0.964+-0.123(stat.)+-0.071(syst.) Br(LambdaB->Jpsi Lambda0) Br(LambdaBbar->Jpsi pbar K+) ------------------------------------------- = 1.037+-0.139(stat.)+-0.078(syst.) Br(LambdaBbar->Jpsi Lambda0bar) 此外，我們也回報兩個衰變通道中電荷-宇稱對稱的直接測量結果： LambdaB->Jpsi pK = 0.011+-0.064+0.004-0.010 LambdaB->Jpsi Lambda0 = 0.057 +- 0.037 +0.005-0.002 而數據顯示沒有發現電荷-宇稱對稱破壞。 | zh_TW |
| dc.description.abstract | This research measures the branching fraction ratio of LambdaB->Jpsi pK to LambdaB->Jpsi Lambda0
in proton-proton collisions at a centre-of-mass energy sqrt s = 13 TeV, using 35.798 inverse femtobarn integrated luminosity of data recorded with the CMS detector at the Large Hadron Collider. The branching fraction ratios are measured to be Br(LambdaB->Jpsi pK+) ------------------------------------------- = 0.964+-0.123(stat.)+-0.071(syst.) Br(LambdaB->Jpsi Lambda0) Br(LambdaBbar->Jpsi pbar K+) ------------------------------------------- = 1.037+-0.139(stat.)+-0.078(syst.) Br(LambdaBbar->Jpsi Lambda0bar) We also report the direct charge-parity asymmetry A_CP measurement for both channels as LambdaB->Jpsi pK = 0.011+-0.064+0.004-0.010 LambdaB->Jpsi Lambda0 = 0.057 +- 0.037 +0.005-0.002 , which shows that no charge asymmetry is observed in these decay. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-16T22:57:11Z (GMT). No. of bitstreams: 1 ntu-109-R04245011-1.pdf: 3375366 bytes, checksum: 221ad68309a997327044106d5d8650f3 (MD5) Previous issue date: 2020 | en |
| dc.description.tableofcontents | 1 Intruduction 13
1.1 Standard Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1.1.1 CKM Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 1.2 Feynmann Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 1.3 Search Strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2 Apparatus 17 2.1 Coordinate System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.2 Magnet Conguration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2.3 Tracking System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2.4 Electromagnetic Calormeter . . . . . . . . . . . . . . . . . . . . . . . . . 21 2.5 Hadron Calormeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2.6 Muon Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2.7 Trigger System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 3 Data and Simulated Samples 27 3.1 Data Samples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 3.2 Simulation Stream . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 3.3 Simulated Sample . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4 Physics Object Reconstruction 31 4.1 Tracks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 4.2 Muon . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 4.3 Vertex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 4.4 Momentum Re-Reconstruction . . . . . . . . . . . . . . . . . . . . . . . . 36 5 Event Selection 37 5.1 Considered HLT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 5.2 Muon & Track Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 5.3 Totally cut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 6 Vertexing 43 6.1 Reconstruction efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . 43 6.2 Vertexing in detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 6.3 Transverse momentum related vertex reconstruction eciency . . . . . 44 7 Fitting Procedure 49 7.1 Data driven background estimation . . . . . . . . . . . . . . . . . . . . 49 7.2 Signal shape description . . . . . . . . . . . . . . . . . . . . . . . . . . 49 7.3 Signal monte carlo validation . . . . . . . . . . . . . . . . . . . . . . . . 50 8 Systematic uncertainties 53 9 Result 55 10 Summary 57 | |
| dc.language.iso | en | |
| dc.subject | 高能物理 | zh_TW |
| dc.subject | 粒子物理 | zh_TW |
| dc.subject | 分支係數 | zh_TW |
| dc.subject | 緊湊緲子線圈 | zh_TW |
| dc.subject | 底夸克 | zh_TW |
| dc.subject | 電荷宇稱守恆 | zh_TW |
| dc.subject | vertexing | en |
| dc.subject | bphysics | en |
| dc.subject | branching fraction | en |
| dc.subject | penta quark | en |
| dc.subject | cp asymmetry | en |
| dc.subject | charge parity | en |
| dc.subject | CMS | en |
| dc.subject | tracking | en |
| dc.subject | Lambda | en |
| dc.subject | baryon | en |
| dc.subject | high energy physics | en |
| dc.subject | particle physic | en |
| dc.title | 於緊湊渺子線圈質心能量十三兆電子伏特中測量 LambdaB->Jpsi pK 與 LambdaB->Jpsi Lambda0 分支分數比 | zh_TW |
| dc.title | Measurement of branching fraction ratio of LambdaB->Jpsi pK to LambdaB->Jpsi Lambda0 in pp Collisions at sqrt(s) = 13TeV | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 108-1 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 呂榮祥,蔣正偉(Cheng-Wei Chiang),郭家銘(Chia-Ming Kuo) | |
| dc.subject.keyword | 緊湊緲子線圈,底夸克,分支係數,電荷宇稱守恆,高能物理,粒子物理, | zh_TW |
| dc.subject.keyword | CMS,bphysics,branching fraction,penta quark,cp asymmetry,charge parity,vertexing,tracking,Lambda,baryon,high energy physics,particle physic, | en |
| dc.relation.page | 61 | |
| dc.identifier.doi | 10.6342/NTU202000578 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2020-02-26 | |
| dc.contributor.author-college | 理學院 | zh_TW |
| dc.contributor.author-dept | 應用物理研究所 | zh_TW |
| 顯示於系所單位： | 應用物理研究所 | |
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