Nuclear modification factors for jet fragmentation

Abstract

Using a recently-developed perturbative-QCD approach for jet evolution in a dense quark-gluon plasma, we study the nuclear modification factor for the jet fragmentation function. The qualitative behaviour that we find is in agreement with the respective experimental observations in Pb+Pb collisions at the LHC: a pronounced nuclear enhancement at both ends of the spectrum. Our Monte Carlo simulations are supplemented with analytic estimates which clarify the physical interpretation of the results. The main source of theoretical uncertainty is the sensitivity of our calculations to a low-momentum cutoff which mimics confinement. To reduce this sensitivity, we propose a new observable, which describes the jet fragmentation into subjets and is infrared-and-collinear safe by construction. We present Monte Carlo predictions for the associated nuclear modification factor together with their physical interpretation.

arXiv comment37 pages, 11 figures, to appear in JHEP

References in corpus (32)

• Radiative energy loss and $p_{\perp }$-broadening of high energy partons in nuclei
• Better Jet Clustering Algorithms
• Radiative energy loss of high energy quarks and gluons in a finite volume quark-gluon plasma
• Fully quantum treatment of the Landau--Pomeranchuk--Migdal effect in QED and QCD
• Radiative energy loss of high energy quarks in finite-size nuclear matter and quark-gluon plasma
• Bottom-up thermalization in heavy ion collisions
• Medium-induced radiative energy loss; equivalence between the BDMPS and Zakharov formalisms
• Studies of jet quenching using isolated-photon + jet correlations in PbPb and pp collisions at sqrt(s[NN]) = 2.76 TeV
• Energy Loss of Leading Partons in a Thermal QCD Medium
• Antiangular Ordering of Gluon Radiation in QCD Media
• Medium-Induced QCD Cascade: Democratic Branching and Wave Turbulence
• Jets in QCD media: from color coherence to decoherence
• Measurement of the nuclear modification factor for inclusive jets in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV with the ATLAS detector
• Medium response in JEWEL and its impact on jet shape observables in heavy ion collisions
• Effects of jet-induced medium excitation in $\gamma$-hadron correlation in A+A collisions
• Interference effects in medium-induced gluon radiation
• Angular Structure of Jet Quenching Within a Hybrid Strong/Weak Coupling Model
• Full jet in quark-gluon plasma with hydrodynamic medium response
• Vacuum-like jet fragmentation in a dense QCD medium
• Probabilistic picture for medium-induced jet evolution
• Towards the understanding of jet shapes and cross sections in heavy ion collisions using soft-collinear effective theory
• Casimir Meets Poisson: Improved Quark/Gluon Discrimination with Counting Observables
• Groomed jets in heavy-ion collisions: sensitivity to medium-induced bremsstrahlung
• Measurement of jet fragmentation in Pb+Pb and $pp$ collisions at $\sqrt{s_{NN}}=5.02$ TeV with the ATLAS detector
• Study of jet quenching with Z+jet correlations in PbPb and pp collisions at sqrt(s[NN]) = 5.02 TeV
• Modification of Jet Substructure in Heavy Ion Collisions as a Probe of the Resolution Length of Quark-Gluon Plasma
• Evolution of the jet opening angle distribution in holographic plasma
• Jet (de)coherence in Pb-Pb collisions at the LHC
• A Simultaneous Description of Hadron and Jet Suppression in Heavy Ion Collisions
• Jet suppression from small to intermediate to large radius
• Radiative energy loss of neighboring subjets
• Sorting out quenched jets

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• Medium-enhanced $c\bar{c}$ radiation
• Bayesian Constraints on Pre-Equilibrium Jet Quenching and Predictions for Oxygen Collisions
• In-medium gluon radiation spectrum with all-order resummation of multiple scatterings in longitudinally evolving media
• Impacts of EMC effects on the D meson modification factor in equilibrating QGP
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