Statistical analysis of pQCD energy loss across system size, flavor, $\sqrt{s_{NN}}$, and $p_T$

Abstract

We present suppression predictions from our pQCD-based energy loss model, which receives small system size corrections, for high-$p_T$ $\pi$, $D$ and $B$ meson $R_{AB}$ as a function of centrality, flavor, $\sqrt{s_{NN}}$, and $p_T$ from large to small collision systems at RHIC and LHC. A statistical analysis is used to constrain the effective strong coupling in our model to available high-$p_T$ suppression data from central heavy-ion collisions at RHIC and LHC, yielding good agreement with all available data. We estimate two important theoretical uncertainties in our model, stemming from: the transition between vacuum and hard thermal loop propagators in the collisional energy loss, and from the angular cutoff on the radiated gluon momentum. We find, consistently, that the extracted ${\alpha }_s$ remains relatively unchanged across heavy- and light-flavor final states and across central, semi-central, and peripheral collisions. We make predictions from our large-system-constrained model for small systems and find good agreement with photon-normalized $R_{d\text{Au}}^{{\pi }^0}\simeq 0.75$ in $0-5\%$ centrality $d$ + Au collisions by PHENIX. However, we find strong disagreement with the measured $R_{p\text{Pb}}^{h^{\pm }}\gtrsim 1$ in $0-5\%$ centrality $p$ + Pb collisions by ALICE and ATLAS; we argue that this disagreement is due, in large part, to centrality bias. We make predictions for the ratio of suppression in ${}^3$He + Au and $p$ + Au collisions, which may in the future be used to disentangle final- from initial-state suppression in small systems. We then compare our results to various subsets of data, which allows us to estimate the preferred: low-$p_T$ scale at which non-perturbative processes become important, scales at which the strong coupling runs, and scale at which vacuum propagators transition to thermally modified propagators in collisional energy loss.

arXiv comment70 pages without references, 30 figures. Updated with oxygen and neon RAA predictions, as well as qhat discussion

References in corpus (81)

• Microscopic Models for Ultrarelativistic Heavy Ion Collisions
• Relativistic Hadron-Hadron Collisions in the Ultra-Relativistic Quantum Molecular Dynamics Model (UrQMD)
• Glauber Modeling in High Energy Nuclear Collisions
• New Forms of QCD Matter Discovered at RHIC
• Heavy Ion Collisions: The Big Picture, and the Big Questions
• Elliptic and triangular flow in event-by-event (3+1)D viscous hydrodynamics
• The p_T Spectrum in Heavy-Flavour Hadroproduction
• How Much do Heavy Quarks Thermalize in a Heavy Ion Collision?
• Reaction Operator Approach to Non-Abelian Energy Loss
• Multiple Collisions and Induced Gluon Bremsstrahlung in QCD
• Drag force in AdS/CFT
• Fluctuating Glasma initial conditions and flow in heavy ion collisions
• Heavy-flavour and quarkonium production in the LHC era: from proton-proton to heavy-ion collisions
• Global analysis of fragmentation functions for pions and kaons and their uncertainties
• 3+1D hydrodynamic simulation of relativistic heavy-ion collisions
• The Quark-Gluon Plasma: Collective Dynamics and Hard Thermal Loops
• The p_T Spectrum in Heavy-Flavour Photoproduction
• Extracting jet transport coefficient from jet quenching at RHIC and LHC
• Elastic, Inelastic, and Path Length Fluctuations in Jet Tomography
• Event-by-event gluon multiplicity, energy density and eccentricities at RHIC and LHC
• The theory and phenomenology of perturbative QCD based jet quenching
• Heavy Quark Radiative Energy Loss in QCD Matter
• Higher flow harmonics from (3+1)D event-by-event viscous hydrodynamics
• Jet Quenching in Thin Quark-Gluon Plasmas I: Formalism
• Heavy Ion Collisions: Achievements and Challenges
• Towards an understanding of the RHIC single electron data
• Review of Jet Measurements in Heavy Ion Collisions
• Jet Tomography of Au+Au Reactions Including Multi-gluon Fluctuations
• Comparison of Jet Quenching Formalisms for a Quark-Gluon Plasma "Brick"
• Non-Abelian energy loss in cold nuclear matter
• Collisional dissociation of heavy mesons in dense QCD matter
• Particle Production in Heavy Ion Collisions
• Impact-parameter dependent nuclear parton distribution functions: EPS09s and EKS98s and their applications in nuclear hard processes
• Heavy quarks and jets as probes of the QGP
• Angular Structure of Jet Quenching Within a Hybrid Strong/Weak Coupling Model
• The Azimuthal Asymmetry at large p_t seem to be too large for a ``Jet Quenching''
• Bridging Soft-Hard Transport Properties of Quark-Gluon Plasmas with CUJET3.0
• Event-by-event hydrodynamics $+$ jet energy loss: A solution to the $R_{AA}\otimes v_2$ puzzle
• Renormalization of the jet-quenching parameter
• Open Charm and Beauty at Ultrarelativistic Heavy Ion Colliders
• The Surprising Transparency of the sQGP at LHC
• Transverse Expansion and High $p_T$ Azimuthal Asymmetry at RHIC
• Comparing energy loss and $p_{\perp }$-broadening in perturbative QCD with strong coupling $\mathcal{N}=4$ SYM theory
• LHC jet suppression of light and heavy flavor observables
• A Study of Heavy Flavoured Meson Fragmentation Functions in e+ e- annihilation
• The Ter-Mikayelian Effect on QCD Radiative Energy Loss
• Resolving the Scales of the Quark-Gluon Plasma with Energy Correlators
• Energy versus centrality dependence of the jet quenching parameter $\hat{q}$ at RHIC and LHC: a new puzzle?
• Azimuthal jet flavor tomography with CUJET2.0 of nuclear collisions at RHIC and LHC
• Collisional Energy Loss of a Heavy Quark in an Anisotropic Quark-Gluon Plasma
• Principal component analysis of event-by-event fluctuations
• Predicting parton energy loss in small collision systems
• Constraint fitting of experimental data with a jet quenching model embedded in a hydrodynamical bulk medium
• Simulating jets and heavy quarks in the Glasma using the colored particle-in-cell method
• A Simultaneous Description of Hadron and Jet Suppression in Heavy Ion Collisions
• Evidence for x-dependent proton color fluctuations in pA collisions at the LHC
• Hadronization with a confining equation of state
• A perturbative QCD analysis of charged-particle distributions in hadronic and nuclear collisions
• QGP modification to single inclusive jets in a calibrated transport model
• Discovering partonic rescattering in light nucleus collisions
• Information field based global Bayesian inference of the jet transport coefficient
• Running Coupling Corrections to High Energy Inclusive Gluon Production
• Overview of high-density QCD studies with the CMS experiment at the LHC
• Jet Quenching in Heavy Ion Collisions
• Systematic Uncertainties in Theoretical Predictions of Jet Quenching
• Global analysis of color fluctuation effects in proton- and deuteron-nucleus collisions at RHIC and the LHC
• Effects of Fluid Velocity Gradients on Heavy Quark Energy Loss
• Jet Drift and Collective Flow in Heavy-Ion Collisions
• Jets in d(p)-A Collisions: Color Transparency or Energy Conservation
• How to test path-length dependence in energy loss mechanisms: analysis leading to a new observable
• Classical vs quantum corrections to jet broadening in a weakly-coupled Quark-Gluon Plasma
• Drag force to all orders in gradients
• Short path length corrections to Djordjevic-Gyulassy-Levai-Vitev energy loss
• Hard probe path lengths and event-shape engineering of the quark-gluon plasma
• Contribution to differential ${\pi }^0$ and ${\gamma }_{\mathrm{dir}}$ modification in small systems from color fluctuation effects
• No-quenching baseline for energy loss signals in oxygen-oxygen collisions
• Inconsistencies in, and short pathlength correction to, $R_{AA}(p_T)$ in $\mathrm{A}+\mathrm{A}$ and $\mathrm{p}+\mathrm{A}$ collisions
• A unified description of small, peripheral, and large system suppression data from pQCD
• Utilizing high-$p_{\perp }$ theory and data to constrain the initial stages of quark-gluon plasma
• Collisional and radiative energy loss in small systems
• Jet quenching in mini-quark-gluon plasma: Medium modification factor $I_{pA}$ for photon-tagged jets

Cited by in corpus (2)

• Observation of suppressed charged-particle production in ultrarelativistic oxygen-oxygen collisions
• System-size dependence of charged-particle suppression in ultrarelativistic nucleus-nucleus collisions