Disentangling Heavy Flavor at Colliders

Abstract

We propose two new analysis strategies for studying charm and beauty quarks at colliders. The first strategy is aimed at testing the kinematics of heavy-flavor quarks within an identified jet. Here, we use the SoftDrop jet-declustering algorithm to identify two subjets within a large-radius jet, using subjet flavor tagging to test the heavy-quark splitting functions of QCD. For subjets containing a $J/\psi$ or ${\rm Y}$, this declustering technique can also help probe the mechanism for quarkonium production. The second strategy is aimed at isolating heavy-flavor production from gluon splitting. Here, we introduce a new FlavorCone algorithm, which smoothly interpolates from well-separated heavy-quark jets to the gluon-splitting regime where jets overlap. Because of its excellent ability to identify charm and beauty hadrons, the LHCb detector is ideally suited to pursue these strategies, though similar measurements should also be possible at ATLAS and CMS. Together, these SoftDrop and FlavorCone studies should clarify a number of aspects of heavy-flavor physics at colliders, and provide crucial information needed to improve heavy-flavor modeling in parton-shower generators.

22 pages, 14 figures; v2: updated figures with new z_tag condition, references and discussion added

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Cited by in corpus (23)

• Jet Substructure at the Large Hadron Collider: A Review of Recent Advances in Theory and Machine Learning
• Systematics of quark/gluon tagging
• Study of $J/\psi$ production in jets
• Jet Substructure Studies with CMS Open Data
• Inverting the mass hierarchy of jet quenching effects with prompt $b$-jet substructure
• Measurements of $\mu \mu$ pairs from open heavy flavor and Drell-Yan in $p+p$ collisions at $\sqrt{s}=200$ GeV
• Probing the strange Higgs coupling at lepton colliders using light-jet flavor tagging
• Heavy flavor jet production and substructure in electron-nucleus collisions
• Helicity Antenna Showers for Hadron Colliders
• The medium-modified $g\to c\bar{c}$ splitting function in the BDMPS-Z formalism
• Properties of $g\to b\bar{b}$ at small opening angles in $pp$ collisions with the ATLAS detector at $\sqrt{s}=13$ TeV
• B-hadron production at the LHC from bottom-quark pair production at NNLO+PS
• Heavy-Flavour Jets in High-Energy Nuclear Collisions
• On heavy-flavour jets with Soft Drop
• Measurements of groomed-jet substructure of charm jets tagged by ${\mathrm{D}}^0$ mesons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Double-charming Higgs identification using machine-learning assisted jet shapes
• Medium-enhanced $c\bar{c}$ radiation
• Identifying Heavy-Flavor Jets Using Vectors of Locally Aggregated Descriptors
• Tagging new physics with charm
• Probing the mass effect of heavy quark jets in high-energy nuclear collisions
• The partonic origin of multiplicity scaling in heavy and light flavor jets
• Jet fragmentation via azimuthal angular correlations of heavy flavor decay electrons in pp, p--Pb, and Pb--Pb collisions using PYTHIA8+Angantyr
• Studying the QGP with Jets at the LHC and RHIC