First measurement of dNch/dη in OO collisions at 5.36 TeV yields midrapidity densities of 41.8 overall and 135 in central events, consistent with PbPb per participant but showing deviations from simple scaling.
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Acharyaet al.(ALICE Collaboration), (2025), see also related results from ATLAS and CMS Collaborations, arXiv:2509.06428 [nucl-ex]
15 Pith papers cite this work. Polarity classification is still indexing.
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A nonflow subtraction framework for m-particle cumulants is developed and tested in HIJING simulations for O+O and d+Au collisions.
pQCD calculations predict jet quenching suppression scaling as R_AB ≈ (√(AB))^{1/3} in small ion collisions, with ^{3}He and ^{6}Li as clean QGP probes and energy loss models giving v_2 ≈ 0 in small systems.
ATLAS measured charged-particle production in 9.62 TeV p-O collisions, yielding a fiducial pO cross section of 396 mb and extrapolated p-air inelastic cross section of 406 mb, with distributions an order of magnitude more precise than hadronic model differences.
Alpha clustering in 16O and 20Ne suppresses initial spin fluctuations in relativistic collisions, with a scaled ratio of fluctuations between the two systems proposed as a probe of cluster geometry.
ATLAS observes increasing dijet imbalance with centrality in O+O and Ne+Ne collisions at 5.36 TeV, consistent with medium-induced energy loss in small systems.
Bayesian global fit to Xe-Xe and Pb-Pb LHC data infers nearly maximal triaxiality for the 129Xe ground state and extracts two- and three-particle correlations.
Simulations of OO and Ne-Ne collisions at 5.36 TeV show symmetry plane correlations that differ in a pattern consistent with tetrahedral 16O and deformed 20Ne nuclear shapes.
ALICE reports new measurements of pseudorapidity density, v2 and v3 flow coefficients, and neutral pion suppression in light-ion collisions, compared to models for particle production and collective phenomena.
A data-driven method is introduced to quantify contamination effects from light-ion beam transmutation using time-dependent control regions and a simple illustrative model.
In O+O collisions, initial eccentricity and elliptic flow are fluctuation-driven and can be reproduced from a small set of uncorrelated modes.
Archived ALEPH data analysis finds ridge-like modulations and sign-changing v2 proxy in two-particle correlations for multiplicity above 30-50 in e+e- collisions with W+W- contribution, deviating from Monte Carlo predictions.
ATLAS measures charged-particle pseudorapidity density and mean transverse momentum in O+O and Ne+Ne collisions at 5.36 TeV as a function of centrality and eta.
The equilibrated core in O+O collisions overtakes the nonequilibrium corona above midrapidity multiplicity of about 20, yet corona contributions persist in central events, making pure hydrodynamics inadequate.
Volume variation with multiplicity in ultracentral collisions is small when total entropy scales with nuclear mass number, as shown by relating it to initial density fluctuation profiles.
citing papers explorer
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Centrality dependence of charged-hadron pseudorapidity distributions in oxygen-oxygen collisions at $\sqrt{s_\mathrm{NN}}$ = 5.36 TeV
First measurement of dNch/dη in OO collisions at 5.36 TeV yields midrapidity densities of 41.8 overall and 135 in central events, consistent with PbPb per participant but showing deviations from simple scaling.
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Nonflow Subtraction Beyond Two-Particle Correlations
A nonflow subtraction framework for m-particle cumulants is developed and tested in HIJING simulations for O+O and d+Au collisions.
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Jet Quenching in the Smallest Hadronic Collision Systems
pQCD calculations predict jet quenching suppression scaling as R_AB ≈ (√(AB))^{1/3} in small ion collisions, with ^{3}He and ^{6}Li as clean QGP probes and energy loss models giving v_2 ≈ 0 in small systems.
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Measurement of charged-particle production in $\sqrt{s_\text{NN}}=9.62$ TeV proton-oxygen collisions as a probe of cosmic-ray air showers with the ATLAS detector
ATLAS measured charged-particle production in 9.62 TeV p-O collisions, yielding a fiducial pO cross section of 396 mb and extrapolated p-air inelastic cross section of 406 mb, with distributions an order of magnitude more precise than hadronic model differences.
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Initial spin fluctuations as a probe of cluster spin structure in $^{16}\mathrm{O}$ and $^{20}\mathrm{Ne}$ nuclei
Alpha clustering in 16O and 20Ne suppresses initial spin fluctuations in relativistic collisions, with a scaled ratio of fluctuations between the two systems proposed as a probe of cluster geometry.
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Observation of centrality-dependent dijet transverse momentum imbalance in O+O and Ne+Ne collisions at $\sqrt{s_{NN}}$ = 5.36 TeV with the ATLAS detector
ATLAS observes increasing dijet imbalance with centrality in O+O and Ne+Ne collisions at 5.36 TeV, consistent with medium-induced energy loss in small systems.
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Yoctosecond imaging of the ground state of $^{129}$Xe at the Large Hadron Collider
Bayesian global fit to Xe-Xe and Pb-Pb LHC data infers nearly maximal triaxiality for the 129Xe ground state and extracts two- and three-particle correlations.
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Nuclear geometry driven symmetry plane correlations in OO and Ne--Ne collisions at the Large Hadron Collider
Simulations of OO and Ne-Ne collisions at 5.36 TeV show symmetry plane correlations that differ in a pattern consistent with tetrahedral 16O and deformed 20Ne nuclear shapes.
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Recent ALICE results from light-ion collision systems
ALICE reports new measurements of pseudorapidity density, v2 and v3 flow coefficients, and neutral pion suppression in light-ion collisions, compared to models for particle production and collective phenomena.
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Data-driven method to estimate contamination from light ion beam transmutation at colliders
A data-driven method is introduced to quantify contamination effects from light-ion beam transmutation using time-dependent control regions and a simple illustrative model.
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Event-by-event fluctuations of elliptic flow in ultrarelativistic O+O collisions
In O+O collisions, initial eccentricity and elliptic flow are fluctuation-driven and can be reproduced from a small set of uncorrelated modes.
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Analysis note: Long-range near-side correlation in $e^+e^-$ with $W$-boson-pair events at 183-209 GeV with ALEPH archived data
Archived ALEPH data analysis finds ridge-like modulations and sign-changing v2 proxy in two-particle correlations for multiplicity above 30-50 in e+e- collisions with W+W- contribution, deviating from Monte Carlo predictions.
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Measurements of charged-particle pseudorapidity and transverse momentum distributions in O+O and Ne+Ne collisions at $\sqrt{s_{_\text{NN}}} = 5.36$ TeV with the ATLAS detector
ATLAS measures charged-particle pseudorapidity density and mean transverse momentum in O+O and Ne+Ne collisions at 5.36 TeV as a function of centrality and eta.
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Equilibrated fraction of QCD matter in high-energy oxygen--oxygen collisions
The equilibrated core in O+O collisions overtakes the nonequilibrium corona above midrapidity multiplicity of about 20, yet corona contributions persist in central events, making pure hydrodynamics inadequate.
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The size of the quark-gluon plasma in ultracentral collisions: impact of initial density fluctuations on the average transverse momentum
Volume variation with multiplicity in ultracentral collisions is small when total entropy scales with nuclear mass number, as shown by relating it to initial density fluctuation profiles.