Multijet Discriminators for New Physics in Leptonic Signals at the LHC

Abstract

Some of the cleanest signals for new physics in the early runs of the LHC will involve strongly-produced particles which give rise to multiple leptons by undergoing cascade decays through weakly-interacting states to stable particles. Some of the most spectacular final states will involve three or more leptons, multiple jets and generally missing energy-momentum as well. A triad of the most interesting models of new physics which induce such signals is known to consist of (i) supersymmetry with R-parity conservation, (ii) a universal extra dimension with conservation of KK-parity and (iii) little Higgs models with conserved T-parity. Similar signals could also arise if the Standard Model is augmented with a fourth sequential generation of heavy fermions. We study all these possibilities and show that a judiciously chosen set of observables, critically involving the number of identifiable jets and leptons, can collectively provide distinct footprints for each of these models. In fact, simple pairwise correlation of such observables can enable unambiguous identification of the underlying model, even with a relatively small data sample.

43 pages, LaTex2e, 8 embedded eps figures

References in corpus (25)

• PYTHIA 6.4 Physics and Manual
• A standard format for Les Houches Event Files
• Dark Matter and Collider Phenomenology of Universal Extra Dimensions
• Likelihood Functions for Supersymmetric Observables in Frequentist Analyses of the CMSSM and NUHM1
• Phenomenology of Littlest Higgs Model with T-parity: including effects of T-odd fermions
• Precision electroweak constraints on Universal Extra Dimensions revisited
• Natural Priors, CMSSM Fits and LHC Weather Forecasts
• Bound on minimal universal extra dimensions from Bbar -> X_s gamma
• Constraining the MSSM with universal gaugino masses and implication for searches at the LHC
• Non-universal gaugino masses: a signal-based analysis for the Large Hadron Collider
• Precise reconstruction of sparticle masses without ambiguities
• Missing energy look-alikes with 100 pb-1 at the LHC
• Collider Signature of T-quarks
• The Footprint of F-theory at the LHC
• Trilepton production at the CERN LHC: Standard model sources and beyond
• Exploring the Universal Extra Dimension at the LHC
• Non-universal gaugino and scalar masses, hadronically quiet trileptons and the Large Hadron Collider
• Four-lepton LHC events from MSSM Higgs boson decays into neutralino and chargino pairs
• A Bayesian Analysis of the Constrained NMSSM
• Universal Extra Dimensions, Radiative Returns and the Inverse Problem at a Linear e+e- Collider
• Distinguishing the Littlest Higgs model with T-parity from supersymmetry at the LHC using trileptons
• Probing two Universal Extra Dimensions at International Linear Collider
• Tracking down the elusive charginos / neutralinos through $\tau$ leptons at the Large Hadron Collider
• R_b Constraints on Littlest Higgs Model with T-parity
• Bounding CKM Mixing with a Fourth Family

Cited by in corpus (21)

• Testing Minimal Universal Extra Dimensions Using Higgs Boson Searches at the LHC
• Universal extra dimensions after Higgs discovery
• Vacuum Stability Constraints and LHC Searches for a Model with a Universal Extra Dimension
• Search for the minimal universal extra dimension model at the LHC with $\sqrt{s}$=7 TeV
• Universal Extra-Dimensional models with boundary localized kinetic terms: Probing at the LHC
• LHC Collider Phenomenology of Minimal Universal Extra Dimensions
• Boundary Localized Terms in Universal Extra-Dimensional Models through a Dark Matter perspective
• A Pedagogical Review of Electroweak Symmetry Breaking Scenarios
• Enriching the exploration of the mUED model with event shape variables at the CERN LHC
• Do new data on [B+ -> tau+ nu_tau] decays point to an early discovery of supersymmetry at the LHC?
• Boosted Top Quark Signals for Heavy Vector Boson Excitations in a Universal Extra Dimension Model
• Higgs Boson Decay Constraints on a Model with a Universal Extra Dimension
• Hidden symmetries induced by a canonical transformation and gauge structure of compactified Yang-Mills theories
• Direct bound on the minimal Universal Extra Dimension model from the $t\bar{t}$ resonance search at the Tevatron
• Quark lepton unification in higher dimensions
• Yang-Mills theories with an arbitrary number of compactified extra dimensions
• KK-number non-conserving decays: Signal of n = 2 excitations of Extra-Dimensional Models at the LHC
• Can Flavor Physics Hint at Distinctive Signals for R-parity Violation at the LHC?
• Indian Contributions to LHC Theory
• Supersymmetry Signals at the LHC under the most favorable SUGRA scenario
• Search for new physics in jet multiplicity patterns of multilepton events at $\sqrt{s}$ = 13 TeV