Discovering partonic rescattering in light nucleus collisions

Abstract

We demonstrate that oxygen-oxygen (OO) collisions at the LHC provide unprecedented sensitivity to parton energy loss in a system whose size is comparable to those created in very peripheral heavy-ion collisions. With leading and next-to-leading order calculations of nuclear modification factors, we show that the baseline in the absence of partonic rescattering is known with up to 2% theoretical accuracy in inclusive OO collisions. Surprisingly, a $Z$-boson normalized nuclear modification factor does not lead to higher theoretical accuracy within current uncertainties of nuclear parton distribution functions. We study a broad range of parton energy loss models and we find that the expected signal of partonic rescattering can be disentangled from the baseline by measuring charged hadron spectra in the range $20\text{GeV}<p_T<100\text{GeV}$

8 pages, 7 figures, see the companion paper "Predicting parton energy loss in small collision systems"; v2: added NLO hadron baseline calculations, small changes, published version

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• Cone size dependence of jet suppression in heavy-ion collisions
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• Medium Response and Jet-Hadron Correlations in Relativistic Heavy-Ion Collisions
• Enhancement of baryon-to-meson ratios around jets as a signature of medium response
• Scaling behaviors of heavy flavor meson suppression and flow in different nuclear collision systems at the LHC
• Strong constraints on jet quenching in centrality-dependent $p$+Pb collisions at 5.02 TeV from ATLAS
• Multi-partonic medium induced cascades in expanding media
• Predictions for the sPHENIX physics program
• Characterizing nuclear modification effects in high-energy O-O collisions at energies available at the CERN Large Hadron Collider: A transport model perspective
• Jet quenching parameter in QCD kinetic theory
• Light-nuclei gluons from dijet production in proton-oxygen collisions
• Contribution to differential ${\pi }^0$ and ${\gamma }_{\mathrm{dir}}$ modification in small systems from color fluctuation effects
• Search for jet quenching effects in high-multiplicity pp collisions at $\sqrt{s}$ = 13 TeV via di-jet acoplanarity
• No-quenching baseline for energy loss signals in oxygen-oxygen collisions
• An Experiment for Electron-Hadron Scattering at the LHC
• Ratios of jet and hadron spectra at LHC energies: measuring high-$p_T$ suppression without a $pp$ reference
• Glauber predictions for oxygen and neon collisions at energies available at the LHC
• Bayesian Constraints on Pre-Equilibrium Jet Quenching and Predictions for Oxygen Collisions
• Observation of suppressed charged-particle production in ultrarelativistic oxygen-oxygen collisions
• Selection bias effects on high-$p_{\mathrm{T}}$ yield and correlation measurements in Oxygen+Oxygen collisions
• In-medium gluon radiation spectrum with all-order resummation of multiple scatterings in longitudinally evolving media
• A unified description of small, peripheral, and large system suppression data from pQCD
• Statistical analysis of pQCD energy loss across system size, flavor, $\sqrt{s_{NN}}$, and $p_T$
• Impact of scale, nuclear PDF and temperature variations on the interpretation of medium-modified jet production data from the LHC
• Opportunities of OO and $p$O collisions at the LHC
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• Production of leptons from decay of heavy-flavor hadrons in high-energy nuclear collisions
• Studying the QGP with Jets at the LHC and RHIC
• Exploring system size dependence of jet modification in heavy-ion collisions
• Multiplicity-dependent jet modification from di-hadron correlations in pp collisions at $\sqrt{s}=13$ TeV
• System-size dependence of charged-particle suppression in ultrarelativistic nucleus-nucleus collisions