CODEX-b and the Quest for Longevity Philip Ilten May 13, 2020 - PowerPoint PPT Presentation

CODEX-b and the Quest for Longevity Philip Ilten May 13, 2020 Imperial Seminar Ilten The Quest for Longevity 1 / 50

Introduction Dark Matter t d SM matter dark c s 5% matter γ g u b 25% H e ν τ quarks dark energy W Z leptons μ ν μ 70% force carriers τ ν e 1 interacts through gravity 2 does not interact through the electromagnetic or strong forces 3 interacts weakly (or not at all) with itself Ilten The Quest for Longevity 2 / 50

Introduction SM or Embedded Theory N ~ g ~ 4 t d ~ ~ N ~ 3 c s t d ~ ~ G ~ c s N ~ γ g u ~ b ~ 2 u b H e ν τ e ν τ ~ ~ W Z N ~ A 1 μ ν μ τ ν e ν μ μ ~ ~ h C τ ν e ~ ~ ~ 1 + -- - C ~ H 2 Ilten The Quest for Longevity 3 / 50

ν μ μ Introduction Hidden Sector t d c s axion g γ ? u b sterile neutrino H e dark Higgs ν τ W Z dark photon τ ν e Ilten The Quest for Longevity 4 / 50

Introduction Widening the Net arXiv:1707.04591 [hep-ph] Dark Sector Candidates, Anomalies, and Search Techniques zeV aeV feV peV neV µ eV meV eV keV MeV GeV TeV PeV 30M ☉ ≈ QCD Axion WIMPs Ultralight Dark Ma5er Hidden Sector Dark Ma5er Black Holes Pre-InflaIonary Axion Hidden Thermal Relics / WIMPless DM Post-InflaIonary Axion Asymmetric DM Freeze-In DM SIMPs / ELDERS Beryllium-8 Muon g-2 Small-Scale Structure Small Experiments: Coherent Field Searches, Direct DetecIon, Nuclear and Atomic Physics, Accelerators Microlensing ≈ zeV aeV feV peV neV µ eV meV eV keV MeV GeV TeV PeV 30M ☉ Ilten The Quest for Longevity 5 / 50

Introduction It’s Complicated arXiv:1903.04497 [hep-ex] disappearing or displaced kinked tracks multitrack vertices non-pointing (converted) photons displaced leptons, emerging jets lepton-jets, or lepton pairs trackless, low-EMF jets quasi-stable charged particles multitrack vertices in the muon spectrometer Ilten The Quest for Longevity 6 / 50

Introduction An Example e − e − DM DM g ′ g e e g ≡ g ′ e g e γ ∗ A ′ γ ∗ A ′ g e g ′ e e − e − DM DM 1 broken U (1) gauge symmetry in dark sector 2 allow mixing between dark and SM hypercharge fields µν F ′ µν + m A ′ 2 L ⊃ − 1 4 F µν F µν − 1 µ A ′ µ + g e J µ A µ + εg e J µ A ′ 4 F ′ A ′ µ 2 Ilten The Quest for Longevity 7 / 50

Introduction Search Strategies displaced prompt beam beam target detector shield detector • sensitive to shorter • sensitive to long lifetimes lifetimes • EM background free • bump hunt on large EM background • difficult to normalise • normalised from sidebands • do both simultaneously for best of both worlds Ilten The Quest for Longevity 8 / 50

Introduction Parameter Space JHEP 06 (2018) 10 − 2 50 fs 1500 fs 10 − 3 prompt 100000 fs 10 − 4 ε 10 − 5 displaced outside detector 10 − 6 10 − 2 10 − 1 10 0 10 1 m A ′ [GeV] Ilten The Quest for Longevity 9 / 50

Experimental Landscape Experimental Landscape Ilten The Quest for Longevity 10 / 50

Experimental Landscape LHC Detectors pixel silicon strip ECAL Cherenkov drift tube HCAL muon Ilten The Quest for Longevity 11 / 50

Experimental Landscape Seeing a Signal Ilten The Quest for Longevity 12 / 50

Experimental Landscape LHCb Trigger LHCb, JINST 8 (2013) Run 2 hardware Run 3 1 TB/s 50 GB/s 0.7 GB/s detector software disk 5 TB/s O(10) GB/s • real-time calibration and full event reconstruction in Run 2 • inclusive dimuon from threshold and jet triggers in Run 2 • full detector readout in Run 3 Ilten The Quest for Longevity 13 / 50

Experimental Landscape SHiP arXiv:1310.1762 Ilten The Quest for Longevity 14 / 50

Experimental Landscape SHiP arXiv:1310.1762 Ilten The Quest for Longevity 15 / 50

Experimental Landscape FASER arXiv:1811.10243 Ilten The Quest for Longevity 16 / 50

Experimental Landscape FASER arXiv:1811.10243 Ilten The Quest for Longevity 17 / 50

Experimental Landscape MATHSULA arXiv:1606.06298 Ilten The Quest for Longevity 18 / 50

Experimental Landscape AL3X arXiv:1810.03636 Ilten The Quest for Longevity 19 / 50

CODEX-b CODEX-b Ilten The Quest for Longevity 20 / 50

CODEX-b Expression of Interest arXiv:1911.00481 [hep-ex] • A Co mpact D etector for Ex otics at LHC b • letter of interest released last November, arXiv:1911.00481 [hep-ex] • letter of intent submitted • collaboration growing: 28 contributors and 16 institutes Ilten The Quest for Longevity 21 / 50

CODEX-b CODEX-b in a Nutshell DELPHI CODEX-b box SM SM ϕ x shield veto UXA shield Pb shield IP8 Ilten The Quest for Longevity 22 / 50

CODEX-b Zooming In Ilten The Quest for Longevity 23 / 50

CODEX-b A Picture is Worth . . . heavier ( & 10 GeV) → LHC coverage (ATLAS, CMS, LHCb) Transverse m LLP MATHUSLA, AL3X, . . . ) (CODEX-b, Forward ← lighter ( . 10 MeV) (FASER, SHiP, NA62, . . . ) SCHEMATIC ← near ∼ m far → c τ Ilten The Quest for Longevity 24 / 50

CODEX-b A Picture is Worth . . . heavier ( & 10 GeV) → LHC coverage (ATLAS, CMS, LHCb) m LLP Transverse Forward ← lighter ( . 10 MeV) (CODEX-b, (FASER, SHiP, MATHUSLA, AL3X, . . . ) NA62, . . . ) SCHEMATIC ← lighter ∼ cc , bb , ττ heavier → h , t √ ˆ s Ilten The Quest for Longevity 25 / 50

CODEX-b Why CODEX-b? 1 we need a transverse detector at the LHC 2 probes a wide range of LLP models; complementary or competitive with existing/proposed detectors 3 accessible zero background location with necessary services, DELPHI/UXA cavern 4 integration with LHCb trigger-less readout 5 compact size and modest cost with ability to extend Ilten The Quest for Longevity 26 / 50

CODEX-b Timing is Key (pre COVID-19) 2020 2021 2022 2023 2024 2025 2026 LS 2 Run 3 LS 3 CODEX- β Production Install data taking Removal Production CODEX-b Partial Install 2027 2028 2029 2030 2031 2032 2033 Run 4 LS 4 Run 5 Production CODEX-b data taking Remaining Install data taking • significant progress has been made • priority is finalising CODEX- β design and plans • Birmingham working on technical drawings • more detailed design informed from CODEX- β Ilten The Quest for Longevity 27 / 50

Minimal Models Minimal Models Ilten The Quest for Longevity 28 / 50

Minimal Models Model Overview Vector ( A ′ ) hA ′ A ′ F ′ F yes F ′ F no reach Scalar ( S ) SH † H S 2 H † H yes yes SH † H HNL ( N ) HLN yes HLN qγ µ γ 5 q a ˜ a ˜ a ( W ˜ W − B ˜ ALP ( a ) ∂ µ a ¯ B ) GG FF Production portal Decay portal yes yes pending pending UV operator Ilten The Quest for Longevity 29 / 50

ATLAS 2DV 10 3 10 −1 MATHUSLA(200) AL3X ( 100 fb −1 ) CODEX-b 10 5 𝑑𝜐 [m] 𝑑𝜐 [m] ATLAS 1DV 10 1 10 3 10 −1 10 −1 10 −2 10 −3 10 −4 10 −5 ATLAS 2DV CODEX-b 10 1 Minimal Models Dark Photon • no sensitivity to inclusive production from EM currents • sensitive to production from H → A ′ A ′ decays 𝑛 𝐵 ′ = 0.5 GeV 𝑛 𝐵 ′ = 10 GeV Br [ℎ → 𝐵 ′ 𝐵 ′ ] Ilten The Quest for Longevity 30 / 50