[论文解读] CEPC Conceptual Design Report: Volume 2 - Physics & Detector

The CEPC Study Group|arXiv (Cornell University)|Nov 23, 2018

Particle Detector Development and Performance被引用 232

一句话总结

本卷论证 CEPC 的物理学意义，概述概念性探测器设计与技术，并评估在一个240 GeV 的 Higgs 工厂（及 Z/WW 运行）与两个相互作用点的预期性能和未来探测器研发。

ABSTRACT

The Circular Electron Positron Collider (CEPC) is a large international scientific facility proposed by the Chinese particle physics community to explore the Higgs boson and provide critical tests of the underlying fundamental physics principles of the Standard Model that might reveal new physics. The CEPC, to be hosted in China in a circular underground tunnel of approximately 100 km in circumference, is designed to operate as a Higgs factory producing electron-positron collisions with a center-of-mass energy of 240 GeV. The collider will also operate at around 91.2 GeV, as a Z factory, and at the WW production threshold (around 160 GeV). The CEPC will produce close to one trillion Z bosons, 100 million W bosons and over one million Higgs bosons. The vast amount of bottom quarks, charm quarks and tau-leptons produced in the decays of the Z bosons also makes the CEPC an effective B-factory and tau-charm factory. The CEPC will have two interaction points where two large detectors will be located. This document is the second volume of the CEPC Conceptual Design Report (CDR). It presents the physics case for the CEPC, describes conceptual designs of possible detectors and their technological options, highlights the expected detector and physics performance, and discusses future plans for detector R&D and physics investigations. The final CEPC detectors will be proposed and built by international collaborations but they are likely to be composed of the detector technologies included in the conceptual designs described in this document. A separate volume, Volume I, recently released, describes the design of the CEPC accelerator complex, its associated civil engineering, and strategic alternative scenarios.

研究动机与目标

• Motivate the CEPC as a Higgs factory and precision probe of the Standard Model.
• Describe conceptual detector designs and technology options.
• Summarize expected physics performance and measurements at CEPC.
• Outline future detector R&D and physics investigation plans.

提出的方法

• Present the physics goals enabled by CEPC operation at 240 GeV, 91.2 GeV, and ~160 GeV.
• Describe two-detector concept with large detector technologies.
• Highlight expected detector performance and measurement capabilities.
• Discuss detector R&D and future physics investigations.

实验结果

研究问题

• RQ1 What physics measurements and precision tests can CEPC at 240 GeV, 91.2 GeV, and ~160 GeV achieve?
• RQ2 What detector technologies and designs are suitable for CEPC physics goals?
• RQ3 What is the anticipated performance of the proposed detectors for Higgs, Z, and WW studies?
• RQ4 What are the future R&D directions and physics investigations enabled by CEPC?

主要发现

• CEPC is envisioned as a circular 100 km tunnel hosting two interaction points for Higgs, Z, and WW studies.
• CEPC aims to produce approximately one trillion Z bosons, 100 million W bosons, and over one million Higgs bosons.
• The volume presents the physics case, conceptual detector designs, and expected performance.
• Detector concepts are based on technologies included in the proposed designs.
• A separate volume describes the accelerator complex and strategic scenarios.
• International collaborations will propose final detectors drawn from the conceptual options.