Signals of supersymmetry with inaccessible first two families at the Large Hadron Collider

Abstract

We investigate the signals of supersymmetry (SUSY) in a scenario where only the third family squarks and sleptons can be produced at the Large Hadron Collider (LHC), in addition to the gluino, charginos and neutralinos. The final states in such cases are marked by a multiplicity of top and/or bottom quarks. We study in particular, the case when the stop, sbottom and gluino masses are near the TeV scale due to which, the final state t's and b's are very energetic. We point out the difficulty in b-tagging and identifying energetic tops and suggest several event selection criteria which allow the signals to remain significantly above the standard model background. We show that such scenarios with gluino mass up to 2 TeV can be successfully probed at the LHC. Information on $\tan \beta$ can also be obtained by looking at associated Higgs production in the cascades of accompanying neutralinos. We also show that a combined analysis of event rates in the different channels and the effective mass distribution allows one to differentiate this scenario from the one where all three sfermion families are accessible.

arXiv commentv3: 17 pages, 8 figures, 7 tables

References in corpus (27)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• ALPGEN, a generator for hard multiparton processes in hadronic collisions
• A Supersymmetry Primer
• Expected Performance of the ATLAS Experiment - Detector, Trigger and Physics
• The More Minimal Supersymmetric Standard Model
• Focus Points and Naturalness in Supersymmetry
• Top-tagging: A Method for Identifying Boosted Hadronic Tops
• Should Squarks Be Degenerate?
• Horizontal Symmetries for the Supersymmetric Flavor Problem
• Anomalous U(1) as a mediator of Supersymmetry Breaking
• Gaugino condensation and the anomalous $U(1)$
• Top pair invariant mass distribution: a window on new physics
• Top Jets at the LHC
• Top Quark Pairs at High Invariant Mass - A Model-Independent Discriminator of New Physics at the LHC
• The "Top Priority" at the LHC
• High p_T Top Quarks at the Large Hadron Collider
• Top Quark Pair plus Large Missing Energy at the LHC
• LHC Signature of the Minimal SUGRA Model with a Large Soft Scalar Mass
• Aspects of Supersymmetric Models with a Radiatively Driven Inverted Mass Hierarchy
• Calculable Sparticle Masses with Radiatively Driven Inverted Mass Hierarchy
• Heavy-flavour tagging and the supersymmetry reach of the CERN Large Hadron Collider
• Focus Point SUSY at the LHC Revisited
• Identifying Multi-Top Events from Gluino Decay at the LHC
• Disoriented and Plastic Soft Terms: A Dynamical Solution to the Problem of Supersymmetric Flavor Violations
• Phenomenology of a String-Inspired Supersymmetric Model with Inverted Scalar Mass Hierarchy
• Models with Inverse Sfermion Mass Hierarchy and Decoupling of the SUSY FCNC Effects

Cited by in corpus (7)

• Non-Simplified SUSY: Stau-Coannihilation at LHC and ILC
• Inverted Sparticle Hierarchies from Natural Particle Hierarchies
• Boosted top quarks in supersymmetric cascade decays at the LHC
• Non-universal SUGRA at LHC: Prospects and Discovery Potential
• Entangled System of Squarks from the Third Generation at the Large Hadron Collider
• Supersymmetry Signals at the LHC under the most favorable SUGRA scenario
• Indian Contributions to LHC Theory