Dissecting new physics models through kinematic edges

Abstract

Kinematic edges in the invariant mass distributions of different final state particles are typically a signal of new physics. In this work we propose a scenario wherein these edges could be utilised in discriminating between different classes of models. To this effect, we consider the resonant production of a heavy Higgs like resonance (H 1 ) as a case study. Such states are a characteristic feature of many new physics scenarios beyond the Standard Model (SM). In the event of a discovery, it is essential to identify the true nature of the underlying theory. In this work we propose a channel, $H_1\to t_{2}t$, where t_2 is a vector-like gauge singlet top-partner that decays into W b, Zt, ht. Invariant mass distributions constructed out of these final states are characterized by the presence of kinematic edges, which are unique to the topology under consideration. Further, since all the final state particles are SM states, the position in the edges of these invariant mass distributions can be used to exclusively determine the masses of the resonances. Observation of these features are meant to serve as a trigger, thereby mandating a more detailed analysis in a particular direction of parameter space. The absence of these edge like features, in the specific invariant mass distributions considered here, in minimal versions of supersymmetric models (MSSM) also serves as a harbinger of such non MSSM-like scenarios.

2 figures added, title modified, a benchmark point added, references added Matches with the published version

References in corpus (16)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• FeynRules - Feynman rules made easy
• Jet substructure as a new Higgs search channel at the LHC
• Light custodians in natural composite Higgs models
• Top-tagging: A Method for Identifying Boosted Hadronic Tops
• Search for Scalar Diphoton Resonances in the Mass Range $65-600$ GeV with the ATLAS Detector in $pp$ Collision Data at $\sqrt{s}$ = 8 $TeV$
• Constraints on and future prospects for Two-Higgs-Doublet Models in light of the LHC Higgs signal
• Collider Signature of T-quarks
• Constrained invariant mass distributions in cascade decays. The shape of the "$m_{qll}$-threshold" and similar distributions
• A Weakly Coupled Ultraviolet Completion of the Littlest Higgs with T-parity
• Testing the Littlest Higgs Model with T-parity at the Large Hadron Collider
• Search Strategies for Top Partners in Composite Higgs models
• Three body kinematic endpoints in SUSY models with non-universal Higgs masses
• The Elusive Gluon
• Reconstruction of Vector-like Top Partner from Fully Hadronic Final States
• A Higgs in the Warped Bulk and LHC signals