Probing Colored Particles with Photons, Leptons, and Jets
arXiv:1204.1119 · doi:10.1007/JHEP11(2012)097
Abstract
If pairs of new colored particles are produced at the Large Hadron Collider, determining their quantum numbers, and even discovering them, can be non-trivial. We suggest that valuable information can be obtained by measuring the resonant signals of their near-threshold QCD bound states. If the particles are charged, the resulting signatures include photons and leptons and are sufficiently rich for unambiguously determining their various quantum numbers, including the charge, color representation and spin, and obtaining a precise mass measurement. These signals provide well-motivated benchmark models for resonance searches in the dijet, photon+jet, diphoton and dilepton channels. While these measurements require that the lifetime of the new particles be not too short, the resulting limits, unlike those from direct searches for pair production above threshold, do not depend on the particles' decay modes. These limits may be competitive with more direct searches if the particles decay in an obscure way.
39 pages, 9 figures; v2: more recent searches included
References in corpus (12)
- Parton distributions for the LHC
- FeynRules - Feynman rules made easy
- Colored Resonant Signals at the LHC: Largest Rate and Simplest Topology
- Massive color-octet bosons and pairs of resonances at hadron colliders
- Search for narrow resonances in dilepton mass spectra in pp collisions at sqrt(s) = 7 TeV
- Color Sextet Scalars at the CERN Large Hadron Collider
- Diphoton decays of stoponium at the Large Hadron Collider
- Search for three-jet resonances in pp collisions at sqrt(s) = 7 TeV
- Color Octet Scalar Bound States at the LHC
- Radiative corrections to stoponium annihilation decays
- Central exclusive production of longlived gluinos at the LHC
- Hadronization, spin, and lifetimes