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1. The Road Ahead for CODEX-b

Author

Aielli, Giulio, Alimena, Juliette, Beacham, James, Ben-Haim, Eli, Borsato, Martino, Charles, Matthew John, Vidal, Xabier Cid, Coco, Victor, De Roeck, Albert, Dey, Biplab, Dumps, Raphael, Gligorov, Vladimir V., Suarez, Rebeca Gonzalez, Gorordo, Thomas, Henry, Louis, Ilten, Philip, Johnson, Daniel, Knapen, Simon, Dortz, Olivier Le, Soliño, Saul López, Mombächer, Titus, Nachman, Benjamin, Northacker, David T., Papucci, Michele, Pásztor, Gabriella, Pizzimento, Luca, Polci, Francesco, Robinson, Dean J., Schindler, Heinrich, Sokoloff, Michael D., Suresh, Aditya, Swallow, Paul, Vari, Riccardo, Veres, Gábor, Sierra, Carlos Vázquez, Watson, Nigel, Wilkinson, Michael K., Williams, Michael, and Fernández, Emilio Xosé Rodríguez

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
Abstract

In this Snowmass contribution we present a comprehensive status update on the progress and plans for the proposed CODEX-b detector, intended to search for long-lived particles beyond the Standard Model. We review the physics case for the proposal and present recent progress on optimization strategies for the detector and shielding design, as well as the development of new fast and full simulation frameworks. A summary of the technical design for a smaller demonstrator detector (CODEX-$\beta$) for the upcoming Run~3 of the LHC is also discussed, alongside the road towards realization of the full experiment at the High-Luminosity LHC., Comment: 13 pages, 13 figures, Snowmass contribution

Published
2022

2. Expression of Interest for the CODEX-b Detector

Author

Aielli, Giulio, Ben-Haim, Eli, Cardarelli, Roberto, Charles, Matthew John, Vidal, Xabier Cid, Coco, Victor, Dey, Biplab, Dumps, Raphael, Evans, Jared A., Gibbons, George, Dortz, Olivier Le, Gligorov, Vladimir V., Ilten, Philip, Knapen, Simon, Lee, Jongho, Soliño, Saul López, Nachman, Benjamin, Papucci, Michele, Polci, Francesco, Quessard, Robin, Ramani, Harikrishnan, Robinson, Dean J., Schindler, Heinrich, Sokoloff, Michael D., Swallow, Paul, Vari, Riccardo, Watson, Nigel, and Williams, Mike

Subjects
High Energy Physics - Experiment, High Energy Physics - Phenomenology
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-$\beta$, 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., Comment: 99 pages, 36 figures. Journal version

Published
2019
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3. Expression of interest for the CODEX-b detector

Author

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, and Williams, Mike

Subjects
Nuclear and Plasma Physics, Particle and High Energy Physics, Physical Sciences, hep-ex, hep-ph, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum Physics, Nuclear & Particles Physics, Astronomical sciences, Atomic, molecular and optical physics, Particle and high energy physics
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.

Published
2020

5. Expression of interest for the CODEX-b detector

Author

Massachusetts Institute of Technology. Laboratory for Nuclear Science, 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, Massachusetts Institute of Technology. Laboratory for Nuclear Science, 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, and Williams, Michael

Published
2021

7. Luminosity scenarios for LHCb Upgrade II

Author

Albrecht, Johannes, Charles, Matthew John, Dufour, Laurent, Needham, Matthew David, Parkes, Chris, Passaleva, Giovanni, Schopper, Andreas, Thomas, Eric, Vagnoni, Vincenzo, Williams, Mark Richard James, and Wilkinson, Guy

Subjects
Physics::Instrumentation and Detectors, High Energy Physics::Experiment, Particle Physics - Experiment
Abstract

The potential HL-LHC operational scenarios for LHCb Upgrade II are reviewed. Their impact on the physics performance of the LHCb Upgrade II experiment is described considering: the total integrated luminosity to be collected; the impact of beam-crossing angles on measurements of $CP$ violation; the effects of pile-up and the size of the luminous region. A maximum instantaneous luminosity of 1.5 × 1034 cm$^{−2}$s$^{−1}$ is recommended and detectors should be designed to withstand up to 350 fb$^{−1}$ during Run 5 and 6 (400 fb$^{−1}$ in Run 1-6). The RMS of the luminous region, spatially and temporally, should be maximised. Identical crossing angles for both magnet polarities is preferred as is collection of equal integrated luminosity in each configuration. From the scenarios currently presented, a purely vertical crossing plane during collisions best meets these requirements.

Published
2019

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