期刊
EUROPEAN PHYSICAL JOURNAL C
卷 80, 期 12, 页码 -出版社
SPRINGER
DOI: 10.1140/epjc/s10052-020-08711-3
关键词
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资金
- MINECO (Spain) [RYC-2016-20073]
- Xunta Gal [ED431F 2018/01]
- ERC CoGRECEPT GA within the H2020 framework programme [724777]
- U.S. DOE [DE-SC0009988, DE-AC02-05CH11231]
- Paul Dirac fund at the Institute for Advanced Study
- NSF [PHY-1912836]
- National Science Foundation [PHY-1607611]
- Munich Institute for Astro- and Particle Physics (MIAPP)
- Galileo Galilei Institute for Theoretical Physics
- Xunta de Galicia (Centro singular de investigacion de Galicia accreditation) [20192022]
- European Union ERDF
- Mara de Maeztu Units of Excellence program [MDM-2016-0692]
- Spanish Research State Agency
- European Research Council (ERC) [724777] Funding Source: European Research Council (ERC)
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-beta, 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-beta 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.
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