Inverting the mass hierarchy of jet quenching effects with prompt $b$-jet substructure

Abstract

The mass of heavy quarks, such as charm and bottom, plays an important role in the formation of parton showers. This effect is apparently not well understood when parton showers evolve in a strongly interacting quark-gluon plasma. We propose a new experimental measurement in relativistic heavy ion collisions, based on a two-prong subjet structure inside a reconstructed heavy flavor jet, which can place stringent constraints on the mass dependence of in-medium splitting functions. We identify the region of jet transverse momenta where parton mass effects are leading and predict a unique reversal of the mass hierarchy of jet quenching effects in heavy ion relative to proton collisions. Namely, the momentum sharing distribution of prompt $b$-tagged jets is more strongly modified in comparison to the one for light jets. Our work is useful in guiding experimental efforts at the Large Hadron Collider and the Relativistic Heavy Ion Collider in the near future.

arXiv comment7 pages, 5 figures, matches published version

References in corpus (30)

• A Brief Introduction to PYTHIA 8.1
• Parton distributions with LHC data
• Observation of a Centrality-Dependent Dijet Asymmetry in Lead-Lead Collisions at sqrt(S(NN))= 2.76 TeV with the ATLAS Detector at the LHC
• Heavy quark colorimetry of QCD matter
• Heavy-flavour and quarkonium production in the LHC era: from proton-proton to heavy-ion collisions
• The LPM effect in QCD and Radiative energy loss in a quark-gluon plasma
• Jet momentum dependence of jet quenching in PbPb collisions at sqrt(sNN)=2.76 TeV
• Jet size dependence of single jet suppression in lead-lead collisions at sqrt(s(NN)) = 2.76 TeV with the ATLAS detector at the LHC
• Jets from Massive Unstable Particles: Top-Mass Determination
• Modification of jet shapes in PbPb collisions at sqrt(s[NN]) = 2.76 TeV
• Measurement of jet fragmentation in PbPb and pp collisions at sqrt(s[NN]) = 2.76 TeV
• Sudakov Safety in Perturbative QCD
• Measurement of jet suppression in central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Extending Soft-Collinear-Effective-Theory to describe hard jets in dense QCD media
• Suppression and azimuthal anisotropy of prompt and nonprompt J/psi production in PbPb collisions at sqrt(s[NN]) = 2.76 TeV
• Jet Quenching from QCD Evolution
• Probing the hardest branching of jets in heavy ion collisions
• Medium-induced parton splitting kernels from Soft Collinear Effective Theory with Glauber gluons
• Measurements of jet quenching with semi-inclusive hadron+jet distributions in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV
• Exposing the QCD Splitting Function with CMS Open Data
• Jet quenching phenomenology from soft-collinear effective theory with Glauber gluons
• First measurement of jet mass in Pb-Pb and p-Pb collisions at the LHC
• Comment on Quark Masses in SCET
• Inclusive b-jet production in heavy ion collisions at the LHC
• Study of jet quenching with Z+jet correlations in PbPb and pp collisions at sqrt(s[NN]) = 5.02 TeV
• Inclusive production of small radius jets in heavy-ion collisions
• Measurement of jet fragmentation in Pb+Pb and $pp$ collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV with the ATLAS detector
• Jet Substructure Studies with CMS Open Data
• Factorization, Power Corrections, and the Pion Form Factor
• Disentangling Heavy Flavor at Colliders

Cited by in corpus (35)

• Jet quenching and medium response in high-energy heavy-ion collisions: a review
• Measurements of inclusive jet spectra in pp and central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• A complete set of in-medium splitting functions to any order in opacity
• The Present and Future of QCD
• Quark branching in QCD matter to any order in opacity beyond the soft gluon emission limit
• Can We Observe Jet $P_T$-broadening in Heavy-Ion Collisions at the LHC?
• Diffusion of charm quarks in jets in high-energy heavy-ion collisions
• Transverse-Energy-Energy Correlations in Deep Inelastic Scattering
• The soft drop groomed jet radius at NLL
• Heavy meson tomography of cold nuclear matter at the electron-ion collider
• Jet charge modification in dense QCD matter
• Predictions for energy correlators probing substructure of groomed heavy quark jets
• Inclusive heavy flavor jet production with semi-inclusive jet functions: from proton to heavy-ion collisions
• Medium Response and Jet-Hadron Correlations in Relativistic Heavy-Ion Collisions
• Heavy flavor jet production and substructure in electron-nucleus collisions
• Searching for QGP droplets with high-$p_T$ hadrons and heavy flavor
• Dead-cone searches in heavy-ion collisions using the jet tree
• Prospects for quarkonium studies at the high-luminosity LHC
• Pushing forward jet substructure measurements in heavy-ion collisions
• Predictions for the sPHENIX physics program
• Radial profile of bottom quarks in jets in high-energy nuclear collisions
• On heavy-flavour jets with Soft Drop
• Heavy-Flavour Jets in High-Energy Nuclear Collisions
• The soft drop momentum sharing fraction $z_g$ beyond leading-logarithmic accuracy
• Probing the in-medium $P_T$-broadening by $\gamma$+HF angular de-correlations
• Longitudinal momentum fraction of heavy-flavor mesons in jets in high-energy nuclear collisions
• Measurements of groomed-jet substructure of charm jets tagged by ${\mathrm{D}}^0$ mesons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Open Heavy Flavors in Nuclear Collisions: Theory Overview
• Probing the mass effect of heavy quark jets in high-energy nuclear collisions
• Heavy Flavour Jet Substructure
• Mass suppression effect in QCD radiation and hadron angular distribution in jet
• The Fox-Wolfram Moment of Jet Production in Relativistic Heavy Ion Collisions
• Jet splitting functions in the vacuum and in a QCD medium
• Quarkonium tomography of heavy ion collisions at the LHC
• Jet substructure of light and heavy flavor jets at RHIC