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Expression of interest for the CODEX-b detector

Author(s)
Aielli, Giulio; Ben-Haim, Eli; Cardarelli, Roberto; Charles, Matthew John; Cid Vidal, Xabier; Coco, Victor; Dey, Biplab; Dumps, Raphael; Evans, Jared A.; Gibbons, George; Dortz, Olivier Le; Gligorov, Vladimir V.; Ilten, Philip; Knapen, Simon; Lee, Jongho; López Soliño, Saul; Nachman, Benjamin; Papucci, Michele; Polci, Francesco; Quessard, Robin; Ramani, Harikrishnan; Robinson, Dean J.; Schindler, Heinrich; Sokoloff, Michael D.; Swallow, Paul; Vari, Riccardo; Watson, Nigel; Williams, Michael; ... Show more Show less
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Abstract
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-β, 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-β 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.
Date issued
2020-12
URI
https://hdl.handle.net/1721.1/129758
Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
European Physical Journal C
Publisher
Springer Science and Business Media LLC
Citation
Aielli, Giulio et al. "Expression of interest for the CODEX-b detector." The European Physical Journal C 80, 12 (December 2020): 1177 © 2020 The Author(s)
Version: Final published version
ISSN
1434-6044
1434-6052

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