CODEX-b: Opening New Windows to the Long-Lived Particle Frontier at the LHC
Abstract
This document is written as a contribution to the European Strategy of Particle Physics (ESPP) update. We offer a detailed overview of current developments and future directions for the CODEX-b detector, which aims to detect long-lived particles beyond the Standard Model. We summarize the scientific motivation for this detector, advances in our suite of simulation and detector optimization frameworks, and examine expected challenges, costs, and timelines in realizing the full detector. Additionally, we describe the technical specifications for the smaller-scale demonstrator detector (CODEX-) we have installed in the LHCb experimental cavern.
Keywords
Cite
@article{arxiv.2505.05952,
title = {CODEX-b: Opening New Windows to the Long-Lived Particle Frontier at the LHC},
author = {Giulio Aielli and Juliette Alimena and Saul Balcarcel-Salazar and Eli Ben Haim and András Barnabás Burucs and Roberto Cardarelli and Matthew J. Charles and Xabier Cid Vidal and Albert De Roeck and Biplab Dey and Silviu Dobrescu and Ozgur Durmus and Mohamed Elashri and Vladimir V. Gligorov and Rebeca Gonzalez Suarez and Zarria Gray and Conor Henderson and Louis Henry and Philip Ilten and Daniel Johnson and Jacob Kautz and Simon Knapen and Bingxuan Liu and Yang Liu and Saul López Soliño and Pablo Eduardo Menéndez-Valdés Pérez and Titus Mombächer and Benjamin Nachman and David T. Northacker and Gabriel M. Nowak and Michele Papucci and Gabriella Pásztor and María Pereira Martínez and Michael Peters and Jake Pfaller and Luca Pizzimento and Máximo Pló Casasús and Gian Andrea Rassati and Dean J. Robinson and Emilio Xosé Rodríguez Fernández and Debashis Sahoo and Sinem Simsek and Michael D. Sokoloff and Joeal Subash and James Swanson and Abhinaba Upadhyay and Riccardo Vari and Carlos Vázquez Sierra and Gábor Veres and Nigel Watson and Michael K. Wilkinson and Michael Williams and Eleanor Winkler},
journal= {arXiv preprint arXiv:2505.05952},
year = {2025}
}
Comments
Input to the 2026 update of the European Strategy for Particle Physics. 10 pages + references + appendices. 8 figures, 5 tables. This submission draws heavily from the CODEX-b Snowmass contribution (arXiv:2203.07316 ), but makes additional points and is a standalone separate document. arXiv admin note: substantial text overlap with arXiv:2203.07316