Expression of Interest for the CODEX-b Detector

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.

arXiv comment99 pages, 36 figures. Journal version

References in corpus (147)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• Freeze-In Production of FIMP Dark Matter
• Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC $pp$ collision data at $\sqrt{s}=$ 7 and 8 TeV
• LHCb Detector Performance
• The $\nu$MSM, Dark Matter and Baryon Asymmetry of the Universe
• The glueball spectrum from an anisotropic lattice study
• The $\nu$MSM, Dark Matter and Neutrino Masses
• Echoes of a Hidden Valley at Hadron Colliders
• Electroweak baryogenesis
• Inelastic Dark Matter
• A facility to Search for Hidden Particles at the CERN SPS: the SHiP physics case
• The p_T Spectrum in Heavy-Flavour Hadroproduction
• The Twin Higgs: Natural Electroweak Breaking from Mirror Symmetry
• Asymmetric Dark Matter
• Cosmological Relaxation of the Electroweak Scale
• From eV to EeV: Neutrino Cross Sections Across Energy Scales
• The SIMP Miracle
• Glueball Spectrum and Matrix Elements on Anisotropic Lattices
• The Belle II Physics Book
• Asymmetric Dark Matter: Theories, Signatures, and Constraints
• Physics Beyond Colliders at CERN: Beyond the Standard Model Working Group Report
• LHC Phenomenology of an Extended Standard Model with a Real Scalar Singlet
• The p_T Spectrum in Heavy-Flavour Photoproduction
• Collider Probes of Axion-Like Particles
• FASER: ForwArd Search ExpeRiment at the LHC
• Illuminating Dark Photons with High-Energy Colliders
• Long-Lived Particles at the Energy Frontier: The MATHUSLA Physics Case
• The SIMPlest Miracle
• Exotic Decays of the 125 GeV Higgs Boson
• FASER's Physics Reach for Long-Lived Particles
• A Minimal Spontaneously Broken Hidden Sector and its Impact on Higgs Boson Physics at the Large Hadron Collider
• Hunting All the Hidden Photons
• Discovering the Higgs Through Highly-Displaced Vertices
• Phenomenology of Hidden Valleys at Hadron Colliders
• Search for $A^{\prime }\to {\mu }^{+}{\mu }^{-}$ decays
• Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider
• Searching for Long-lived Particles: A Compact Detector for Exotics at LHCb
• New Detectors to Explore the Lifetime Frontier
• The Beam and detector of the NA62 experiment at CERN
• Phenomenology of GeV-scale Heavy Neutral Leptons
• Decay and Detection of a Light Scalar Boson Mixing with the Higgs
• Light inflaton Hunter's Guide
• Search for dark photons produced in 13 TeV $pp$ collisions
• Dynamical Dark Matter: I. Theoretical Overview
• Dark Sectors at the Fermilab SeaQuest Experiment
• Emerging Jets
• Elastically Decoupling Dark Matter
• A Twin Higgs Model from Left-Right Symmetry
• Search for heavy neutral leptons in events with three charged leptons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Inclusive Dark Photon Search at LHCb
• SIMP Spectroscopy
• Measurement of $W^{\pm }$ and $Z$-boson production cross sections in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Abelian Hidden Sectors at a GeV
• Measurement of the fragmentation fraction ratio $f_s/f_d$ and its dependence on $B$ meson kinematics
• Search for Neutral Heavy Leptons in a High-Energy Neutrino Beam
• Search for hidden-sector bosons in $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decays
• Dark photons from charm mesons at LHCb
• Coupling QCD-scale axion-like particles to gluons
• Multi-lepton Signatures of a Hidden Sector in Rare B Decays
• Search for long-lived scalar particles in $B^{+}\to K^{+}\chi ({\mu }^{+}{\mu }^{-})$ decays
• Discovering Inelastic Thermal-Relic Dark Matter at Colliders
• Search for heavy neutral leptons in decays of $W$ bosons produced in 13 TeV $pp$ collisions using prompt and displaced signatures with the ATLAS detector
• Heavy Neutral Leptons at FASER
• Inelastic Dark Matter at the LHC Lifetime Frontier: ATLAS, CMS, LHCb, CODEX-b, FASER, and MATHUSLA
• Collider Searches for Long-Lived Particles Beyond the Standard Model
• Phenomenology of relaxion-Higgs mixing
• Discovering Uncolored Naturalness in Exotic Higgs Decays
• Freeze-In Dark Matter with Displaced Signatures at Colliders
• Higgs boson decays to four fermions through an abelian hidden sector
• Asymmetric Twin Dark Matter
• Search for electroweak production of supersymmetric states in scenarios with compressed mass spectra at $\sqrt{s}=13$ TeV with the ATLAS detector
• Dark Higgs Bosons at FASER
• Dynamical Dark Matter: II. An Explicit Model
• Cosmology and Accelerator Tests of Strongly Interacting Dark Matter
• A Fourth Exception in the Calculation of Relic Abundances
• Cosmological Higgs-Axion Interplay for a Naturally Small Electroweak Scale
• Colorless Top Partners, a 125 GeV Higgs, and the Limits on Naturalness
• Search for n-nbar oscillation in Super-Kamiokande
• Baryogenesis and Dark Matter from $B$ Mesons
• Co-Decaying Dark Matter
• BBN for the LHC: constraints on lifetimes of the Higgs portal scalars
• Heavy neutral fermions at the high-luminosity LHC
• Flavor-specific scalar mediators
• Limits on the Mixing of Tau Neutrino to Heavy Neutrinos
• Measurement of the $b$-quark production cross-section in 7 and 13 TeV $pp$ collisions
• Baryogenesis for WIMPs
• Killing the cMSSM softly
• Dark Matter Freeze-in Production in Fast-Expanding Universes
• It's all right(-handed neutrinos): a new $W^{\prime }$ model for the $R_{D^{(\ast )}}$ anomaly
• Phases of Cannibal Dark Matter
• Probing Baryogenesis with Displaced Vertices at the LHC
• Thermal Dark Matter Through the Dirac Neutrino Portal
• Triggering Soft Bombs at the LHC
• The Photophobic ALP
• D${}_s^{+}$ meson production at central rapidity in proton-proton collisions at $\sqrt{s}$ = 7 TeV
• Searching for Confining Hidden Valleys at the LHC(b)
• Search for long-lived particles produced in $pp$ collisions at $\sqrt{s}=13$ TeV that decay into displaced hadronic jets in the ATLAS muon spectrometer
• NA62 sensitivity to heavy neutral leptons in the low scale seesaw model
• $R(D^{(\ast )})$ from $W^{\prime }$ and right-handed neutrinos
• Measurement of B meson production cross-sections in proton-proton collisions at sqrt(s)= 7 TeV
• New Prospects in Fixed Target Searches for Dark Forces with the SeaQuest Experiment at Fermilab
• Probing Light Dark Matter with a Hadrophilic Scalar Mediator
• Leveraging the ALICE/L3 cavern for long-lived exotics
• Measurement of $D^{\ast \pm }$, $D^{\pm }$ and $D_s^{\pm }$ meson production cross sections in $pp$ collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
• Observation of the decay Bc+ -> Bs0 pi+
• The Vector-like Twin Higgs
• Resolving phenomenological problems with strongly-interacting-massive-particle models with dark vector resonances
• Search for new particles decaying to a jet and an emerging jet
• Long-Lived Staus and Displaced Leptons at the LHC
• Distinguishing Dynamical Dark Matter at the LHC
• Updated search for long-lived particles decaying to jet pairs
• Gamma-rays from Dark Showers with Twin Higgs Models
• Natural Heavy Supersymmetry
• Baryogenesis from Oscillations of Charmed or Beautiful Baryons
• Vector SIMP dark matter
• R-parity Violation and Light Neutralinos at CODEX-b, FASER, and MATHUSLA
• Detecting Hidden Particles with MATHUSLA
• Analysis of Long Lived Particle Decays with the MATHUSLA Detector
• CP Violating Baryon Oscillations
• Realistic calculations of nuclear disappearance lifetimes induced by neutron-antineutron oscillations
• Right-handed Neutrinos and $R(D^{(\ast )})$
• Constraints on Relaxion Windows
• Baryogenesis from B Meson Oscillations
• Search for light long-lived neutral particles produced in $pp$ collisions at $\sqrt{s}=$ 13 TeV and decaying into collimated leptons or light hadrons with the ATLAS detector
• Phenomenological Constraints on Axion Models of Dynamical Dark Matter
• The HeRSCheL detector: high-rapidity shower counters for LHCb
• Thermal Relic Targets with Exponentially Small Couplings
• Flavor and Collider Signatures of Asymmetric Dark Matter
• A Supersymmetric Theory of Baryogenesis and Sterile Sneutrino Dark Matter from $B$ Mesons
• Probing Dark Matter freeze-in with long-lived particle signatures: MATHUSLA, HL-LHC and FCC-hh
• Relic Abundance in a Secluded Dark Matter Scenario with a Massive Mediator
• Naturalizing Supersymmetry with a Two-Field Relaxion Mechanism
• Strategies for Probing Non-Minimal Dark Sectors at Colliders: The Interplay Between Cuts and Kinematic Distributions
• Measurement of angular and CP asymmetries in $D^0\to {\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$ and $D^0\to K^{+}{K}^{-}{\mu }^{+}{\mu }^{-}$ decays
• Dynamical Dark Matter, MATHUSLA, and the Lifetime Frontier
• Searching for a light $Z^{\prime }$ through Higgs production at the LHC
• Search for rare $B_{(s)}^0\to {\mu }^{+}{\mu }^{-}{\mu }^{+}{\mu }^{-}$ decays
• Low-Scale D-term Inflation and the Relaxion
• Search for the suppressed decays $B^{+}\to K^{+}{K}^{+}{\pi }^{-}$ and $B^{+}\to {\pi }^{+}{\pi }^{+}{K}^{-}$
• Measurement of neutral-current $K^{+}$ production by neutrinos using MINERvA
• Measurement of the branching fractions of the decays $D^{+}\to K^{-}{K}^{+}{K}^{+}$, $D^{+}\to {\pi }^{-}{\pi }^{+}{K}^{+}$ and $D_s^{+}\to {\pi }^{-}{K}^{+}{K}^{+}$
• Characterisation of different stages of hadronic showers using the CALICE Si-W ECAL physics prototype

Cited by in corpus (58)

• Feebly-Interacting Particles:FIPs 2020 Workshop Report
• The Present and Future Status of Heavy Neutral Leptons
• The Search for Feebly-Interacting Particles
• Heavy Axion Opportunities at the DUNE Near Detector
• FACET: A new long-lived particle detector in the very forward region of the CMS experiment
• Mapping the viable parameter space for testable leptogenesis
• Searches for Long-Lived Particles at the Future FCC-ee
• Unveiling Hidden Physics at the LHC
• Tau Neutrinos in the Next Decade: from GeV to EeV
• Dark Scalars and Heavy Neutral Leptons at DarkQuest
• ALPINIST: Axion-Like Particles In Numerous Interactions Simulated and Tabulated
• Dark Higgs Bosons at Colliders
• Sensitivities to feebly interacting particles: public and unified calculations
• Axion-like Particle Searches at DarkQuest
• A Theory of Dark Pions
• Displaced new physics at colliders and the early universe before its first second
• Probing right-handed neutrinos dipole operators
• Exotic Higgs Decays
• Reinterpretation of searches for long-lived particles from meson decays
• Light Scalars at FASER
• Searching for Flavor-Violating ALPs in Higgs Decays
• Extending the Discovery Potential for Inelastic-Dipole Dark Matter with FASER
• Searching for light long-lived neutralinos at Super-Kamiokande
• Long-Lived Light Mediators from Higgs boson Decay at HL-LHC, FCC-hh and a Proposal of Dedicated LLP Detectors for FCC-hh
• Energetic long-lived particles in the CMS muon chambers
• Probing HNL-ALP couplings at colliders
• Forecasting dark showers at Belle II
• Quark flavor violation and axion-like particles from top-quark decays at the LHC
• Probing some photon portals to new physics at intensity frontier experiments
• Exploring the potential of FCC-hh to search for particles from $B$ mesons
• Sensitivity of the FACET experiment to Heavy Neutral Leptons and Dark Scalars
• Searching for inelastic dark matter with future LHC experiments
• Enhanced long-lived dark photon signals at lifetime frontier detectors
• Inferring the nature of active neutrinos: Dirac or Majorana?
• Measuring lepton number violation in heavy neutral lepton decays at the future muon collider
• Advancing the phenomenology of GeV-scale axion-like particles
• Leading Logs in QCD Axion Effective Field Theory
• Searching for heavy neutral leptons coupled to axion-like particles at the LHC far detectors and SHiP
• Gamma Factory Searches for Extremely Weakly-Interacting Particles
• Low-Scale Leptogenesis with Low-Energy Dirac CP-Violation
• Heavy Neutral Leptons at Beam Dump Experiments of Future Lepton Colliders
• Probing light sterile neutrinos in left-right symmetric models with displaced vertices and neutrinoless double beta decay
• LHC Lifetime Frontier and Visible Decay Searches in Composite Asymmetric Dark Matter Models
• Emerging Jets Displaced into the Future
• First Evaluation of Meson and $\tau$ lepton Spectra and Search for Heavy Neutral Leptons at ILC Beam Dump
• Searching Dark Photons using displaced vertices at Belle II -- with backgrounds
• SHIFT@LHC: Searches for New Physics with Shifted Interaction on a Fixed Target at the Large Hadron Collider
• ALPs and HNLs at LHC and Muon Colliders: Uncovering New Couplings and Signals
• Testing Heavy Neutral Leptons in Cosmic Ray Beam Dump experiments
• Searching for long-lived light neutralinos and axionlike particles at the SHiNESS experiment
• The Forward Physics Facility at the High-Luminosity LHC
• Search for b hadron decays to long-lived particles in the CMS endcap muon detectors
• Technical design report for the CODEX-$\beta$ demonstrator
• Long-lived Light Mediators in a Higgs Portal Model at the FCC-ee
• New physics particles mixing with mesons: production in the fragmentation chain
• Di-decay signature of new physics particles at intensity frontier experiments
• Detecting long-lived particles trapped in detector material at the LHC
• Following the muon track of hierarchical sectors at LHCb