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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 王名儒(Min-Zu Wang) | |
| dc.contributor.author | Shu-Hao Yang | en |
| dc.contributor.author | 楊書豪 | zh_TW |
| dc.date.accessioned | 2021-06-15T13:53:28Z | - |
| dc.date.available | 2020-08-21 | |
| dc.date.copyright | 2020-08-21 | |
| dc.date.issued | 2020 | |
| dc.date.submitted | 2020-08-13 | |
| dc.identifier.citation | [1] Standard model of elementary particles (Wiki) https://commons.wikimedia.org/wiki/File:Standard_Model_of_Elementary_Particles.svg [2] Elementary particle interactions (Wiki) https://commons.wikimedia.org/wiki/File:Elementary_particle_interactions.svg [3] Exotic hadron (Wiki) https://en.wikipedia.org/wiki/Exotic_hadron [4] S. Kurokawa and E. Kikutani , ”Overview of the KEKB Accelerators”, Nucl. Instrum. Methods Phys. Res., Sect. A 499, 1, 1-7 (2003). [5] A. Abashian et al., ”The Belle detector”, Nucl. Instrum. Methods Phys. Res., Sect. A479, 1, 117-232 (2002). [6] The High Energy Accelerator Research Organization https://www.kek.jp/en/ [7] Z. Natkaniec et al., ”Belle SVD2 Vertex Detector”, Nucl. Instrum. Methods Phys. Res., Sect. A 568, 269-273 (2006). [8] M. Z. Wang et al., ”Review of EFC options”, (Belle internal), Belle Note 164 (1996). [9] K. Miyabayashi , ”Belle Electromagnetic Calorimeter”, Nucl. Instrum. Methods Phys. Res., Sect. A 494, 1-3, 298-302 (2002). [10] A. Abashian et al., ”Muon Identification in the Belle Experiment at KEKB”, Nucl. Instrum. Methods Phys. Res., Sect. A 491, 69-82 (2002). [11] PID Joint Group (Belle internal) https://belle.kek.jp/group/pid_joint/ [12] J. I. Tanaka , ”Kinematic Fitting”, (Belle internal), Belle Note 194 (2000). [13] S. Yang et al., ”Observation of a Narrow Structure in pK− Mass Spectrum with Λc → pK−π+ near the Λη Threshold”, (Belle internal), Belle Note 1544 (2019). [14] K. F. Chen, T. L. Kuo, Y. J. Lee , ”Λ selection at Belle”, (Belle internal), Belle Note 684 (2004). [15] W. Chen et al., ”Exotic hadron states” arXiv:1411.0585 [16] Y. R. Liu et al., ”Pentaquark and Tetraquark states” arXiv:1903.11976 [17] Pentaquark (Wiki) https://en.wikipedia.org/wiki/Pentaquark [18] Tetraquark (Wiki) https://en.wikipedia.org/wiki/Tetraquark [19] X. Liu ”An overview of XYZ new particles” Chin. Sci. Bull. 59, 3815-3830 (2014), arXiv:1312.7408 [20] Particle data group https://pdg.lbl.gov/ [21] LHCb collaboration, R.Aaij et al., ”Observation of structure in the J/ψ-pair mass spectrum” arXiv:2006.16957 [22] LHCb collaboration, R.Aaij et al., ”Observation of J/ψp resonances consistent with pentaquark states in Λb → J/ψK−p decays” Phys. Rev. Lett. 115, 072001 (2015), arXiv:1507.03414 [23] LHCb collaboration, R.Aaij et al., ”Observation of a narrow pentaquark state, Pc(4312)+, and of two-peak structure of the Pc(4450)+” Phys. Rev. Lett. 122, 222001 (2019), arXiv:1904.03947 | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/51853 | - |
| dc.description.abstract | 本篇論文嘗試在Belle 實驗的數據中尋找尚未被發現的新粒子。Belle 實驗是位於日本筑波的高能加速器研究機構B介子工廠透過不對稱能量的正負電子對對撞所進行的大型高能實驗。從實驗所獲得的龐大數據中,我們每次挑選二種不同種類的粒子進行組合，再從合併後計算出來的不變質量分布中檢查是否有未知的信號。最終我們並沒有觀察到任何未知的新粒子。 | zh_TW |
| dc.description.abstract | We try to search for new unknown particles at Belle. With the huge amount of data collected by Belle detector, we implied a simple method, direct combination with clean tag, to execute an extensive search. Finally, we didn’t observe any unknown particle in all results. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-15T13:53:28Z (GMT). No. of bitstreams: 1 U0001-0808202014381000.pdf: 4857322 bytes, checksum: 82e9063e87275123731b839e31117b93 (MD5) Previous issue date: 2020 | en |
| dc.description.tableofcontents | List of Tables iii List of Figures iv 1 Introduction 1 1.1 Standard Model 1 1.1.1 Hadrons (Mesons and Baryons) 3 1.1.2 Exotic Quark States 3 1.2 Motivation 5 2 Belle Experiment 6 2.1 KEKB accelerator 7 2.2 Belle Detector 9 2.2.1 Beam Pipe 11 2.2.2 Silicon Vertex Detector (SVD) 11 2.2.3 Central Drift Chamber (CDC) 13 2.2.4 Aerogel Cherenkov Counters (ACC) 15 2.2.5 Time of Flight (TOF) 17 2.2.6 Electromagnetic Calorimeter (ECL) 19 2.2.7 KL and Muon detection system (KLM)20 3 Hatron List 22 3.1 J/ψ-Tag 22 3.2 φ-Tag 24 3.3 KS0-Tag 25 3.4 Λ-Tag 27 3.5 Λc±-Tag 29 3.6 p-Tag 31 4 Combinations 32 4.1 Meson-Meson Combinations 33 4.1.1 J/ψJ/ψ 33 4.1.2 φφ 34 4.1.3 KS0KS0 35 4.1.4 J/ψφ 35 4.1.5 J/ψKS0 36 4.1.6 φKS0 38 4.2 Meson-Baryon Combinations 39 4.2.1 J/ψp 39 4.2.2 J/ψΛ 42 4.2.3 J/ψΛc 42 4.2.4 φp 43 4.2.5 φΛ 44 4.2.6 φΛc 44 4.2.7 KS0p 45 4.2.8 KS0Λ 46 4.2.9 KS0Λc 47 4.3 Baryon-Baryon Combinations 48 4.3.1 pp 48 4.3.2 ΛΛ 49 4.3.3 ΛcΛc 49 4.3.4 pΛ 50 4.3.5 pΛc 50 4.3.6 ΛΛc 51 5 Conclusion 52 5.1 Summary Table 52 5.1.1 Summary Table Of All Combinations 52 5.1.2 Summary Table Of Known Particles We Observed 53 5.1.3 Summary Table Of Weird Bumps 53 5.2 Conclusion 54 Bibliography 55 Appendices 58 A An Interesting Result From A Bug 59 | |
| dc.language.iso | en | |
| dc.title | 使用標籤法在Belle 實驗中尋找新粒子 | zh_TW |
| dc.title | Search for new particles with clean tag method at Belle | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 108-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 徐靜戈(Jing-Ge Shiu),張寶棣(Pao-Ti Chang),張敏娟(Ming-Chuan Chang) | |
| dc.subject.keyword | 新粒子,標籤法,Belle 實驗,四夸克態,五夸克態, | zh_TW |
| dc.subject.keyword | new particle,clean tag,Belle experiment,tetraquark,pentaquark, | en |
| dc.relation.page | 60 | |
| dc.identifier.doi | 10.6342/NTU202002679 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2020-08-13 | |
| dc.contributor.author-college | 理學院 | zh_TW |
| dc.contributor.author-dept | 物理學研究所 | zh_TW |
| 顯示於系所單位： | 物理學系 | |
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