請用此 Handle URI 來引用此文件：
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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 張寶棣(Pao-Ti Chang) | |
| dc.contributor.author | Chou Tat Hoi | en |
| dc.contributor.author | 許祖達 | zh_TW |
| dc.date.accessioned | 2021-05-20T20:54:43Z | - |
| dc.date.available | 2013-08-10 | |
| dc.date.available | 2021-05-20T20:54:43Z | - |
| dc.date.copyright | 2011-08-10 | |
| dc.date.issued | 2011 | |
| dc.date.submitted | 2011-08-01 | |
| dc.identifier.citation | Bibliography
[1] B. Aubert, B meson decays to charmless meson pairs containing η or η ′ mesons. , Phys. Rev. D80: 112-002, 2009. [2] J. Wicht, Search for resonant B± ! K±h, B± ! K±γγ Decays at Belle. , Phys. Lett. B662: 323-329, 2008. [3] P. Chang, Improved measurements of branching fractions and CP asymmetries in B ! ηh decays. , Phys. Rev. D75: 071-104, 2007. [4] S.J. Richichi, Two-body B meson decays to η and η ′ : Observation of B ! ηK∗, Phys. Rev. Lett. 85: 520-524, 2000. [5] F. Fang, Study of KS ! π+π− selection, Belle Note 323 (2000). [6] K. Nakamura et al. (Particle Data Group), J. Phys. G37: 075-021, 2010. [7] K. Abe et al., (Belle Collaboration), hep-ex/0308036, 2003. [8] Eric White, Determination of KS Efficiency and Systematic Uncertainty, Belle Note 1207 (2011). [9] Mikihiko Nakao, Measurement of B ! K∗γ Asymmetries and Branching Fractions, Belle Note 513 (2004). [10] B. Bhuyan, High PT Tracking Efficiency Using Partially Reconstructed D∗ Decays, Belle Note 1165 (2010). [11] P. Chang, Update of Branching Fractions and CP Asymmetries for B ! ηh Decays with 500 fb−1, Belle Note 939, (20/7/2006). 126 [12] J. Wicht, Search for resonant B± ! K±h, B± ! K±γγ. , Belle Note 936, (27/3/2007). [13] C.Y. Lin, Relative π0 efficiency using D0 ! Kπ and D0 ! Kππ0 , Belle Note 916, (21/6/2006). [14] H. Kakuno, Neutral B Flavor Tagging for the Measurement of Mixinginduced CP Violation at Belle, hep-ex0403022, (7/2/2008). [15] M. Herrero,”THE STANDARD MODEL”, arXiv:hep-ph/98122242 [16] T.D. Lee, C.N. Yang ,”Question of Parity Conservation in Weak Interaction”, Phys. Rev. 104, 254258 (1956). [17] C.S. Wu ,”Experimental Test of Parity Conservation in Beta decay”, Phys. Rev. 105, 14131415 (1957). [18] J.H. Christenson, et al.,”Evidence for the 2π decay of the K0 S meson”, Phys. Rev. Lett. 13, 128140 (1964). [19] Makoto Kobayashi and Toshihide Maskawa, ”CP-Violation in the Renormalizable Theory ofWeak Interaction”, Prog. Theor. Phys. Vol. 49 Page 652 (1972). [20] S. W. Herb, D. C. Hom, L. M. Lederman, J. C. Sens, H. D. Snyder, and J. K. Yoh, ”Observation of a Dimuon Resonance at 9.5 GeV in 400-GeV Proton-Nucleus Collisions”, Phys. Rev. Lett. 39, 252255 (1977). [21] M. Hazumi, Phys. Lett. B 583, 285 (2004). [22] S. Kurokawa, E. Kikutani, ”Overview of the KEKB accelerators”, Nuclear Instruments and Methods in Physics Research A 499 (2003) 1 - 7. [23] M. T. Cheng et al. Letter of intent for a study of CP violation in B meson decays; KEK Report, 94-2 1994 [24] http://nobelprize.org/nobel prizes/physics/laureates/2008/ 127 [25] A. Abashian et al. (Belle Collaboration), Nucl. Instr. and Meth. A 479, 117 (2002). [26] BELLE HOME PAGE http://belle.kek.jp [27] A. Abashian et al. Nucl. Instr. and Meth. A 491, 69-82 (2002). [28] The EvtGen home page http://www.slac.standford.edu/lange/EvtGen/ [29] GEANT - Detector Description and Simulation Tool http://wwwasd.web.cern.ch/wwwasd/geant/index.html [30] Particle data group http://pdg.lbl.gov [31] F.Fang, Study of KS ! π+π− Selection, Belle Note 323 (2000). [32] Geoffray C. Fox and Stephen Wolfram, Phys. Rev. Lett. 41, 1581 - 1585 (1978). [33] B. Aubert et al. (BABAR Collaboration), Phys. Rev. D81:051101, 2010. [34] G. Punzi (2003), physics/0308063. [35] H. Albrecht et al. (ARGUS Collaboration), Phys. Lett. B 229, 304 (1989). | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/9997 | - |
| dc.description.abstract | 在此篇論文中,我們使用了日本國家高能加速器中心B介子工廠(KEKB) 及其 Belle 偵測器。我們從 772×106 B介子對中分析了 B介子至η介子和h介子之二體稀有衰變與電荷宇稱對稱破壞。其中η介子由兩個光子或三個π介子重組而成。h介子則分別代表了帶電K介子，電π介子和中性K介子。
最後我們在 B->η K 和 B->η π 衰變中找到超過3σ的電荷宇稱對稱破壞徵兆。同時我們也首次量測到 B->η K^0衰變。 | zh_TW |
| dc.description.abstract | We present the improved measurements of the B -> ηh branching fraction and CP asymmetries using a data sample of 711 fb−1 that contains 771.58 million BB pairs collected on Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e− collider. Here h means π±, K± and
K0S . And η is selected in η -> γγ and η -> π+π−π0 decays. The evidence of CP asymmetry for B± -> ηK± is found with 3.8 σ, and 3.0 σ in B± -> ηπ± CP asymmetry. The branching fraction of B0 -> ηK0 is observed with 5.4 σ standard deviation from zero. | en |
| dc.description.provenance | Made available in DSpace on 2021-05-20T20:54:43Z (GMT). No. of bitstreams: 1 ntu-100-R96222004-1.pdf: 11543518 bytes, checksum: dec7d2e2f72aab4bc9b7475e8398adca (MD5) Previous issue date: 2011 | en |
| dc.description.tableofcontents | 1 Prologue 1
1.1 Standard Model . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 CP violation and CKM matrix . . . . . . . . . . . . . . . . . . 3 1.3 Motivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 KEK B-Factory 7 2.1 KEKB Accelerator . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 Belle Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.2.1 Beam Pipe . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.2.2 Silicon Vertex Detector (SVD) . . . . . . . . . . . . . . 13 2.2.3 Extreme Forward Calorimeter (EFC) . . . . . . . . . . 14 2.2.4 Central Drift Chamber (CDC) . . . . . . . . . . . . . . 15 2.2.5 Aerogel Cherenkov counter system (ACC) . . . . . . . 16 2.2.6 Time-of-Flight Counters (TOF) . . . . . . . . . . . . . 17 2.2.7 Electromagnetic Calorimeter (ECL) . . . . . . . . . . . 18 2.2.8 KL and Muon Detector (KLM) . . . . . . . . . . . . . 20 2.2.9 Solenoid Magnet . . . . . . . . . . . . . . . . . . . . . 21 2 3 Basic Selection and and B Reconstruction 25 3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 3.2 Reconstruction and Event Selection . . . . . . . . . . . . . . . 25 4 Background Suppression 33 4.1 Continuum Backgrounds . . . . . . . . . . . . . . . . . . . . . 33 4.1.1 Super Fox/Wolfram moment (SFW) . . . . . . . . . . 34 4.1.2 Fisher discriminant . . . . . . . . . . . . . . . . . . . . 34 4.1.3 Likelihood Ratio (LR) . . . . . . . . . . . . . . . . . . 36 4.1.4 2D Fit (Mbc & ΔE ) . . . . . . . . . . . . . . . . . . . 38 4.1.5 3D Fit (Mbc , ΔE & LR) . . . . . . . . . . . . . . . . 39 4.2 Generic BB and rare B Backgrounds . . . . . . . . . . . . . . 44 4.3 Feedacross Backgrounds . . . . . . . . . . . . . . . . . . . . . 44 5 Control Sample Study 50 5.1 The calibration factors between MC and real data . . . . . . . 52 6 Signal Extraction 56 6.1 Signal And Background PDFs . . . . . . . . . . . . . . . . . . 56 6.2 Ensemble Test . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 6.2.1 B± ! η(γγ)K± and B± ! η(γγ)π± Signal Yield Ensemble Test . . . . . . . . . . . . . . . . . . . . . . . . 63 6.2.2 B± ! η(π+π−π0)K± and B± ! η(π+π−π0)π± Signal Yield Ensemble Test . . . . . . . . . . . . . . . . . . . 66 6.2.3 B0 ! η(γγ)K0 S Signal Yield Ensemble Test . . . . . . . 69 3 6.2.4 B0 ! η(π+π−π0)K0 S Signal Yield Ensemble Test . . . . 71 6.2.5 B± ! η(γγ)K± and B± ! η(γγ)π± ACP Ensemble Test 74 6.2.6 B± ! η(π+π−π0)K± and B± ! η(π+π−π0)π± ACP Ensemble Test . . . . . . . . . . . . . . . . . . . . . . . 76 6.2.7 B± ! η(γγ)K0 S and B± ! η(π+π−π0))K0 S ACP Ensemble Test . . . . . . . . . . . . . . . . . . . . . . . . 78 7 Systematics Error and Efficiency Correction 79 7.1 The efficiency of LR cut . . . . . . . . . . . . . . . . . . . . . 80 7.2 Systematics of Particle Identification . . . . . . . . . . . . . . 83 7.3 Systmatics Error of η and π0 Uncertainty . . . . . . . . . . . . 83 7.4 Summary of Systematics Error . . . . . . . . . . . . . . . . . . 84 8 Box Opening Result 87 A Figure Of Merit 96 B The Translated LR 101 C The modify Mbc 105 D Self Cross Feed Study 111 E Fudge Factors Study in High π0 Momentum Region 116 F The Significance 119 G η ! γγ and η ! π+π−π0 result combination 122 4 H Assumptions in Branching Fraction Measurements 124 5 | |
| dc.language.iso | en | |
| dc.title | B介子至η介子和h介子之二體稀有衰變與電荷宇稱對稱破壞之量測 | zh_TW |
| dc.title | Measurements of Branching fractions and CP Asymmetries of B→ηh decays | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 99-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 黃名儒(Min-Zu Wang),熊怡(Yee Hsiung),侯維恕(George Hou),張敏娟(Ming-Chuan) | |
| dc.subject.keyword | B介子,η介子,h介子,衰變,電荷宇稱對稱破壞, | zh_TW |
| dc.subject.keyword | B meson,η meson,h meson,decay,CPV, | en |
| dc.relation.page | 133 | |
| dc.rights.note | 同意授權(全球公開) | |
| dc.date.accepted | 2011-08-01 | |
| 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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