The effect of recoils on soft-drop-groomed observables in $\gamma$-tagged jets in a multistage approach

Abstract

We investigate medium-induced modifications to jet substructure observables that characterize hard components in central Pb-Pb collisions at $\sqrt{s_{NN}}=5.02$~TeV. Using a multistage Monte Carlo simulation of in-medium jet shower evolution, we explore flavor-dependent medium effects through simulations of inclusive and $\gamma$-tagged jets. The results show that quark jets undergo a nonmonotonic modification compared with gluon jets in observables such as the Pb-Pb to $p$-$p$ ratio of the soft drop prong angle $r_g$, the relative prong transverse momentum $k_{T,g}$, and the groomed mass $m_g$ distributions. Due to this nonmonotonic modification, $\gamma$-tagged jets, enriched in quark jets, provide surprisingly clear signals of medium-induced structural modifications, distinct from effects dominated by selection bias. Further systematic studies demonstrate that these effects are dominated by recoil medium response. This work highlights the potential of hard substructures in $\gamma$-tagged jets as powerful tools for probing the jet-medium interactions in high-energy heavy-ion collisions, in particular by enabling detailed investigations of jet-medium parton scatterings via their associated medium response. All simulations for $\gamma$-tagged jet analyses carried out in this paper used triggered events containing at least one hard photon, which highlights the utility of these observables for future Bayesian analysis.

31 pages, 35 figures

References in corpus (40)

• Jet substructure as a new Higgs search channel at the LHC
• Alternative ansatz to wounded nucleon and binary collision scaling in high-energy nuclear collisions
• The theory and phenomenology of perturbative QCD based jet quenching
• Multi-system Bayesian constraints on the transport coefficients of QCD matter
• Measurements of the Nuclear Modification Factor for Jets in Pb+Pb Collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV with the ATLAS Detector
• Phenomenological constraints on the transport properties of QCD matter with data-driven model averaging
• Measurement of jet fragmentation in PbPb and pp collisions at sqrt(s[NN]) = 2.76 TeV
• Sudakov Safety in Perturbative QCD
• Measurement of inclusive jet charged-particle fragmentation functions in Pb+Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV with the ATLAS detector
• Determining the jet transport coefficient $\hat{q}$ from inclusive hadron suppression measurements using Bayesian parameter estimation
• Sensitivity of jet substructure to jet-induced medium response
• Multistage Monte-Carlo simulation of jet modification in a static medium
• Transverse momentum and centrality dependence of dihadron correlations in Au+Au collisions at sqrt(s_NN)=200 GeV: Jet-quenching and the response of partonic matter
• Energy and momentum deposited into a QCD medium by a jet shower
• Sonic Mach Cones Induced by Fast Partons in a Perturbative Quark-Gluon Plasma
• First measurement of large area jet transverse momentum spectra in heavy-ion collisions
• Universal Flow-Driven Conical Emission in Ultrarelativistic Heavy-Ion Collisions
• Inclusive jet and hadron suppression in a multistage approach
• Dynamical grooming of QCD jets
• 3D structure of jet-induced diffusion wake in an expanding quark-gluon plasma
• Decomposing transverse momentum balance contributions for quenched jets in PbPb collisions at sqrt(s[NN]) = 2.76 TeV
• Search for the elusive jet-induced diffusion wake in $Z/\gamma$-jets with 2D jet tomography in high-energy heavy-ion collisions
• Dynamically groomed jet radius in heavy-ion collisions
• Jet Wake from Linearized Hydrodynamics
• Di-Jet Conical Correlations Associated with Heavy Quark Jets in anti--de Sitter Space/Conformal Field Theory Correspondence
• Medium-induced fragmentation and equilibration of highly energetic partons
• Measurement of substructure-dependent jet suppression in Pb+Pb collisions at 5.02 TeV with the ATLAS detector
• Linear Boltzmann transport for jet propagation in the quark-gluon plasma: Inelastic processes and jet modification
• Jet thermalization in QCD kinetic theory
• In-medium modification of dijets in PbPb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV
• Bayesian Inference analysis of jet quenching using inclusive jet and hadron suppression measurements
• Deep learning assisted jet tomography for the study of Mach cones in QGP
• Anisotropic flow of the fireball fed by hard partons
• Mini-jet quenching in a concurrent jet+hydro evolution and the non-equilibrium quark-gluon plasma
• Multi-scale evolution of charmed particles in a nuclear medium
• Hard jet substructure in a multistage approach
• Isolating perturbative QCD splittings in heavy-ion collisions
• Role of bulk viscosity in deuteron production in ultrarelativistic nuclear collisions
• Search for quasi-particle scattering in the quark-gluon plasma with jet splittings in pp and Pb$-$Pb collisions at $\sqrt{{\text{s}}_{\mathrm{NN}}}=5.02$ TeV
• Medium-induced modification of groomed and ungroomed jet mass and angularities in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV