Expression of interest for the CODEX-b detector
Expression of interest for the CODEX-b detector
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DOI：
10.1140/epjc/s10052-020-08711-3
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发表时间：
2019-11
期刊：
影响因子：
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通讯作者：
G. Aielli;R. Cardarelli;M. Charles;X. C. Vidal;V. Coco;B. Dey;R. Dumps;J. Evans;G. Gibbons-G.-Gib
中科院分区：
文献类型：
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作者：
G. Aielli;R. Cardarelli;M. Charles;X. C. Vidal;V. Coco;B. Dey;R. Dumps;J. Evans;G. Gibbons-G.-Gib
本文件介绍了拟议的CODEX-b长寿命粒子（LLP）探测器的物理案例和辅助研究，以及在LHC运行3期间运行的较小概念验证验证探测器CODEX-。我们开发的CODEX-b物理案例综合了“自上而下”和“自下而上”的理论方法，提供了一个详细的调查，最小和完整的模型具有有限合伙人。其中一些模型以前没有研究过，对于其他一些模型，我们修改了以前文献中的研究：特别是对于胶子和费米子耦合的类轴子粒子。此外，我们提出了更新的模拟预期背景中的CODEX-B的主动屏蔽环境，包括屏蔽传播的不确定性，高能量的尾巴和屏蔽设计的变化的影响。初步结果也包括从背景测量和校准活动。介绍了CODEX演示探测器的设计概况，这将使背景校准和探测器设计研究成为可能。最后，我们对CODEX-b实验的各种设计驱动因素和基线设计的潜在扩展进行了简要研究，包括量热计元件的物理情况，精确计时，LHCb内的事件标记以及精确的低动量跟踪。
This document presents the physics case and ancillary studies for the proposed CODEX-b long-lived particle (LLP) detector, as well as for a smaller proof-of-concept demonstrator detector, CODEX-, to be operated during Run 3 of the LHC. Our development of the CODEX-b physics case synthesizes ‘top-down’ and ‘bottom-up’ theoretical approaches, providing a detailed survey of both minimal and complete models featuring LLPs. Several of these models have not been studied previously, and for some others we amend studies from previous literature: In particular, for gluon and fermion-coupled axion-like particles. We moreover present updated simulations of expected backgrounds in CODEX-b’s actively shielded environment, including the effects of shielding propagation uncertainties, high-energy tails and variation in the shielding design. Initial results are also included from a background measurement and calibration campaign. A design overview is presented for the CODEX-demonstrator detector, which will enable background calibration and detector design studies. Finally, we lay out brief studies of various design drivers of the CODEX-b experiment and potential extensions of the baseline design, including the physics case for a calorimeter element, precision timing, event tagging within LHCb, and precision low-momentum tracking.