The minimal stealth boson: models and benchmarks

Abstract

Stealth bosons are relatively light boosted particles with a cascade decay $S\to A_1{A}_2\to q\bar{q}q\bar{q}$, reconstructed as a single fat jet. In this work, we establish minimal extensions of the Standard Model that allow for such processes. Namely, we consider models containing a new (leptophobic) neutral gauge boson $Z^{\prime }$ and two scalar singlets, plus extra matter required to cancel the $\text{U}(1{)}^{\prime }$ anomalies. Our analysis shows that, depending on the model and benchmark scenario, the expected statistical significance of stealth boson signals (yet uncovered by current searches at the Large Hadron Collider) is up to nine times larger than for the most sensitive of the standard leptophobic $Z^{\prime }$ signals such as dijets, $t\bar{t}$ pairs or dibosons. These results provide strong motivation for model-independent searches that cover these complex signals.

LaTeX 39 pages. Additional comments. Bug corrected, final version in JHEP

References in corpus (8)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Jet substructure as a new Higgs search channel at the LHC
• Top-tagging: A Method for Identifying Boosted Hadronic Tops
• Strategies to Identify Boosted Tops
• New Angles on Energy Correlation Functions
• A generic anti-QCD jet tagger
• Jet Substructure Without Trees
• Detecting a Boosted Diboson Resonance

Cited by in corpus (10)

• Anomaly Detection with Density Estimation
• Learning the latent structure of collider events
• Mass Unspecific Supervised Tagging (MUST) for boosted jets
• Multiphoton signals of a (96 GeV?) stealth boson
• Anomaly detection from mass unspecific jet tagging
• Taming modeling uncertainties with Mass Unspecific Supervised Tagging
• Jet tagging made easy
• Multilepton dark matter signals
• Multiboson signals in the UN2HDM
• Exotic diboson $Z^{\prime }$ decays in the U$\mu \nu$SSM