New Measurements with Stopped Particles at the LHC

Abstract

Metastable particles are common in many models of new physics at the TeV scale. If charged or colored, a reasonable fraction of all such particles produced at the LHC will stop in the detectors and give observable out of time decays. We demonstrate that significant information may be learned from such decays about the properties (e.g. charge or spin) of this particle and of any other particles to which it decays, for example a dark matter candidate. We discuss strategies for measuring the type of decay (two- vs three-body), the types of particles produced, and the angular distribution of the produced particles using the LHC detectors. We demonstrate that with O(10-100) observed decay events, not only can the properties of the new particles be measured but indeed even the Lorentz structure of the decay operator can be distinguished in the case of three-body decays. These measurements can not only reveal the correct model of new physics at the TeV scale, but also give information on physics giving rise to the decay at energy scales far above those the LHC can probe directly.

31 pages, 6 figures. References added, updated to reflect recent experimental results, version accepted for publication in Physical Review D

References in corpus (24)

• Stable Massive Particles at Colliders
• Search for heavy long-lived charged particles in pp collisions at sqrt(s) = 7 TeV
• Search for Long-Lived Massive Charged Particles in 1.96 TeV $\bar{p}p}$ Collisions
• BRIDGE: Branching Ratio Inquiry/Decay Generated Events
• Interactions of Coloured Heavy Stable Particles in Matter
• Search for charged massive long-lived particles with the D0 detector
• R-violating Decay of Wino Dark Matter and electron/positron Excesses in the PAMELA/Fermi Experiments
• Search for stopped gluinos from p-pbar collisions at sqrt(s)=1.96 TeV
• Measuring lifetimes of long-lived charged massive particles stopped in LHC detectors
• A search for charged massive long-lived particles
• Testing Gluino Spin with Three-Body Decays
• Right-chiral sneutrinos and long-lived staus: event characteristics at the Large Hadron Collider
• Gravitino and Goldstino at Colliders
• Determining Spins of Metastable Sleptons at the Large Hadron Collider
• Right sneutrinos and the signals of a stable stop at the Large Hadron Collider
• A Clean Slepton Mixing Signal at the LHC
• Measuring the Lifetime of Trapped Sleptons Using the General Purpose LHC Detectors
• Study of chargino-neutralino production at hadron colliders in a long-lived slepton scenario
• Dark Matter Stabilization Symmetries from Spontaneous Symmetry Breaking
• Dark Matter Stabilization Symmetries and Long-Lived Particles at the Large Hadron Collider
• Supersymmetry in Slow Motion
• Stable Colored Particles R-SUSY Relics or Not?
• Spin and Chirality Determination of Superparticles with Long-Lived Stau at the LHC
• Reconstruction of the left-chiral tau-sneutrino in supersymmetry with a right-sneutrino as the lightest supersymmetric particle

Cited by in corpus (13)

• The Physics Programme Of The MoEDAL Experiment At The LHC
• Search for decays of stopped long-lived particles produced in proton-proton collisions at sqrt(s) = 8 TeV
• Probing Colored Particles with Photons, Leptons, and Jets
• Search for stopped long-lived particles produced in pp collisions at sqrt(s) = 7 TeV
• Search for decays of stopped exotic long-lived particles produced in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Dark sector searches with the CMS experiment
• Dark Matter Assimilation into the Baryon Asymmetry
• Gravitino LSP and leptogenesis after the first LHC results
• Long-lived staus from strong production in a simplified model approach
• Long-Lived stop at the LHC with or without R-parity
• Auto-Concealment of Supersymmetry in Extra Dimensions
• Generation of WIMP Miracle-like Densities of Baryons and Dark Matter
• Long-lived charged sleptons at the ILC/CLIC