Resurrecting the Dead Cone

Abstract

The dead cone is a well-known effect in gauge theories, where radiation from a charged particle of mass m and energy E is suppressed within an angular size of m/E. This effect is universal as it does not depend on the spin of the particle nor on the nature of the gauge interaction. It is challenging to directly measure the dead cone at colliders, however, since the region of suppressed radiation either is too small to be resolved or is filled by the decay products of the massive particle. In this paper, we propose to use jet substructure techniques to expose the dead cone effect in the strong-force radiation pattern around boosted top quarks at the Large Hadron Collider. Our study shows that with 300/fb of 13-14 TeV collision data, ATLAS and CMS could obtain the first direct evidence of the dead cone effect and test its basic features.

12 pages, 12 figures; v2: references added; v3: approximate version to appear in PRD

References in corpus (14)

• PYTHIA 6.4 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Event generation with SHERPA 1.1
• Herwig++ Physics and Manual
• Jet substructure as a new Higgs search channel at the LHC
• Soft Drop
• Boosted objects: a probe of beyond the Standard Model physics
• Techniques for improved heavy particle searches with jet substructure
• Boosted objects and jet substructure at the LHC
• Sudakov Safety in Perturbative QCD
• Aspects of Jets at 100 TeV
• Measurement of colour flow with the jet pull angle in $t\bar{t}$ events using the ATLAS detector at $\sqrt{s}=8$ TeV
• Measurement of color flow in t-tbar events from p-pbar collisions at sqrt(s)=1.96 TeV
• Study of b-quark mass effects in multijet topologies with the DELPHI detector at LEP

Cited by in corpus (21)

• Jet Substructure at the Large Hadron Collider: A Review of Recent Advances in Theory and Machine Learning
• The ALICE experiment: a journey through QCD
• Snowmass 2021 whitepaper: Proton structure at the precision frontier
• Direct observation of the dead-cone effect in QCD
• Jet Substructure Studies with CMS Open Data
• Searching for the dead cone effects with iterative declustering of heavy-flavor jets
• Disentangling Heavy Flavor at Colliders
• A consistent resummation of mass and soft logarithms in processes with heavy flavours
• Soft logarithms in processes with heavy quarks
• An Optimal Observable for Color Singlet Identification
• Dead-cone searches in heavy-ion collisions using the jet tree
• On heavy-flavour jets with Soft Drop
• Impact of laser polarization on q-exponential photon tails in non-linear Compton scattering
• Drag Force in the Vacuum of Confining Gauge Theories
• Identifying Heavy-Flavor Jets Using Vectors of Locally Aggregated Descriptors
• Heavy Flavour Jet Substructure
• Top-Tagging at the Energy Frontier
• Mass suppression effect in QCD radiation and hadron angular distribution in jet
• First Direct Observation of the Dead-Cone Effect
• Heavy Flavor Jet Substructure at Lepton Colliders
• Jet substructure of light and heavy flavor jets at RHIC