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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/97231| Title: | 以蒙地卡羅法尋找Belle ll實驗中B介子至ϕK_L^0介子之衰變事件 MC study for B0 → ϕK_L^0 decay at Belle ll |
| Authors: | 林偉哲 Wei-Che Lin |
| Advisor: | 王名儒 Min-Zu Wang |
| Keyword: | Belle ll 實驗,B介子,B衰變,蒙地卡羅方法,超級B介子工廠,長命K介子, Belle ll,B meson,B decay,Monde-Carlo method,SuperKEKB,K_0^L, |
| Publication Year : | 2025 |
| Degree: | 碩士 |
| Abstract: | 本研究探討了 B 介子的潛在衰變模式 B0 → ϕ KL0。研究分析了積分亮度為 699.235 f b−1 的蒙地卡羅樣本，以模擬由 SuperKEKB 加速器產生的正子電子對碰撞事件。應用訓練過的多變量分析（MVA）分類器來有效區分 KL0 介子與背景噪音。而為了完成信號事件的重建，我們添加了特定的限制條件。在積分亮度為 365.29 f b−1下，我們得到的信號產量為137 ± 36。 This study investigates the potential decay mode B0 → ϕ KL0 of B mesons. The research analyzes 699.235 f b−1 Monte-Carlo samples to simulate e+ e− collisions produced by the SuperKEKB accelerator. A trained multivariate analysis ( MVA ) classifier is applied to effectively distinguish KL0 from background noise. Specific constraints are added to fulfill the reconstruction of signal events. The resulting signal yields are 137 ± 36 under luminosity 365.29 f b−1. |
| URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/97231 |
| DOI: | 10.6342/NTU202500482 |
| Fulltext Rights: | 同意授權(限校園內公開) |
| metadata.dc.date.embargo-lift: | 2025-02-28 |
| Appears in Collections: | 物理學系 |
Files in This Item:
| File | Size | Format | |
|---|---|---|---|
| ntu-113-1.pdf Access limited in NTU ip range | 3.1 MB | Adobe PDF | View/Open |
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