Precision Measurement of the E⁺e⁻→π⁺π⁻π⁰ Cross Section Using Initial-State Radiation
暫譯: 利用初始態輻射精確測量 E⁴e⁵ → π⁴π⁵π⁰ 交叉截面
Sue, Yuki, Iijima, Toru
- 出版商: Springer
- 出版日期: 2026-04-02
- 售價: $6,860
- 貴賓價: 9.5 折 $6,517
- 語言: 英文
- 頁數: 163
- 裝訂: Hardcover - also called cloth, retail trade, or trade
- ISBN: 9819546435
- ISBN-13: 9789819546435
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相關分類:
物理學 Physics
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商品描述
This book presents a high-precision measurement of the cross section for electron-positron annihilation into three pions (π⁺ π⁻ π⁰) using the initial-state radiation (ISR) method with Belle II data, offering key input for the hadronic vacuum polarization contribution to the muon. It addresses longstanding tensions in hadronic cross-section data and contributes to the refinement of the Standard Model prediction of one of its most sensitive observables. The anomalous magnetic moment of the muon is one of the most precisely measured quantities in particle physics and offers a powerful probe of potential physics beyond the Standard Model. One of the leading uncertainties in theoretical predictions arises from hadronic contributions, particularly the hadronic vacuum polarization (HVP) term, which relies on experimental input from cross sections for electron-positron annihilation into hadrons. Among these, the π⁺ π⁻ π⁰ final state is the second-largest contributor after π⁺ π⁻, yet previous measurements suffered from limited statistics or systematic uncertainties. This book presents a comprehensive analysis based on 190 fb⁻¹ of Belle II data collected at or near the Υ(4S) resonance, applying the radiative return method to scan a hadronic mass range from 0.6 to 3.5 GeV. It features event selection, background suppression, efficiency evaluation, and an unfolding procedure to extract the cross section with high accuracy. The analysis includes an updated estimation of the three-pion contribution to the muon's anomalous magnetic moment. In addition to its physics implications, the book demonstrates modern data analysis techniques in collider experiments, including detailed detector modeling, ISR event reconstruction, and systematic uncertainty evaluation. It provides a blueprint and serves as a benchmark for future analyses of hadronic cross sections at the Belle II experiment.
商品描述(中文翻譯)
本書呈現了使用初始態輻射（ISR）方法和 Belle II 數據對電子-正電子湮滅成三個介子（π⁴ π⁵ π⁴）的截面進行高精度測量，為μ子（muon）的強子真空極化貢獻提供了關鍵輸入。它解決了強子截面數據中的長期矛盾，並有助於精煉標準模型對其最敏感觀測量之一的預測。μ子的異常磁矩是粒子物理學中測量最精確的量之一，並提供了對標準模型以外潛在物理的強大探測手段。理論預測中的主要不確定性之一來自強子貢獻，特別是強子真空極化（HVP）項，這依賴於電子-正電子湮滅成強子的截面的實驗輸入。在這些中，π⁴ π⁵ π⁴ 最終態是僅次於 π⁴ π⁵ 的第二大貢獻者，但先前的測量受到統計數據有限或系統性不確定性的影響。本書基於在或接近 Υ(4S) 共振下收集的 190 fb⁻¹ 的 Belle II 數據，進行了全面分析，應用輻射回返方法掃描從 0.6 到 3.5 GeV 的強子質量範圍。它包括事件選擇、背景抑制、效率評估和展開程序，以高精度提取截面。該分析還包括對三介子對μ子異常磁矩貢獻的更新估計。除了其物理意涵外，本書展示了在對撞機實驗中的現代數據分析技術，包括詳細的探測器建模、ISR 事件重建和系統性不確定性評估。它提供了一個藍圖，並作為未來在 Belle II 實驗中分析強子截面的基準。
作者簡介
Yuki Sue is a postdoctoral fellow at the High Energy Accelerator Research Organization (KEK), Japan. He received his Ph.D. from Nagoya University in 2024, where his dissertation focused on precision measurements of the ��+��-→π⁺ π⁻ π⁰ cross section using initial-state radiation at Belle II. He has extensive experience in particle physics experiments, particularly in hadronic cross-sectional measurements relevant for the hadronic vacuum polarization (HVP) contribution to the muon g-2. He published peer-reviewed co-authored articles in Physical Review AB, which is about the contributions to beam diagnostics. He currently participates in the ATLAS experiment at CERN, focusing on the development of hardware trigger systems for the high-luminosity LHC upgrade, and is analyzing Run-3 data to search for signatures of physics beyond the Standard Model. He is supported by a Research Fellowship for Young Scientists from the Japan Society for the Promotion of Science (JSPS) and was awarded the Belle II Achievement Award in 2023.
作者簡介(中文翻譯)
Yuki Sue 是日本高能加速器研究組織（KEK）的博士後研究員。他於2024年在名古屋大學獲得博士學位，論文專注於使用 Belle II 的初始態輻射進行精確測量的 \( e^+ e^- \to \pi^0 \pi^+ \pi^- \) 交叉截面。他在粒子物理實驗方面擁有豐富的經驗，特別是在與強子真空極化（HVP）對於μ子 g-2 影響相關的強子交叉截面測量方面。他在《Physical Review AB》上發表了經過同行評審的共同作者文章，該文章探討了對束流診斷的貢獻。他目前參與了位於CERN的ATLAS實驗，專注於高亮度LHC升級的硬體觸發系統的開發，並正在分析Run-3數據以尋找超越標準模型的物理特徵。他獲得了日本學術振興會（JSPS）青年科學家研究獎學金的支持，並於2023年獲得了Belle II成就獎。
