Recognition: unknown
Observation of suppressed charged-particle production in ultrarelativistic oxygen-oxygen collisions
read the original abstract
A hot and dense state of nuclear matter, known as the quark-gluon plasma, is created in collisions of ultrarelativistic heavy nuclei. Highly energetic quarks and gluons, collectively referred to as partons, lose energy as they travel through this matter, leading to suppressed production of particles with large transverse momenta ($p_\mathrm{T}$). Conversely, high-$p_\mathrm{T}$ particle suppression has not been seen in proton-lead collisions, raising questions regarding the minimum system size required to observe parton energy loss. Oxygen-oxygen (OO) collisions examine a region of effective system size that lies between these two extreme cases. The CMS detector at the CERN LHC has been used to quantify charged-particle production in inclusive OO collisions for the first time via measurements of the nuclear modification factor ($R_\mathrm{AA}$). The $R_\mathrm{AA}$ is derived by comparing particle production to expectations based on proton-proton (pp) data and has a value of unity in the absence of nuclear effects. The data for OO and pp collisions at a nucleon-nucleon center-of-mass energy $\sqrt{s_\mathrm{NN}}$ = 5.36 TeV correspond to integrated luminosities of 6.1 nb$^{-1}$ and 1.02 pb$^{-1}$, respectively. The $R_\mathrm{AA}$ is below unity with a minimum of 0.69 $\pm$ 0.04 around $p_\mathrm{T}$ = 6 GeV. The data exhibit better agreement with theoretical models incorporating parton energy loss as compared to baseline models without energy loss.
This paper has not been read by Pith yet.
Forward citations
Cited by 7 Pith papers
-
Nuclear Modification of $\pi^0$ Production in OO Collisions with ALICE
ALICE presents the first R_OO for π⁰ in OO collisions, finding up to 4σ suppression relative to pp collisions and 2.4σ deviation from cold nuclear matter model predictions.
-
Light-front Hamiltonian jet evolution in the Glasma
A light-front Hamiltonian method evolves a quark through Glasma fields to obtain transverse momentum broadening and jet quenching consistent with classical scaling in saturation momentum.
-
Collisional energy loss distribution of a fast parton in a hot or dense QCD medium
The probability distribution for collisional energy loss of a fast parton in hot QCD matter is derived from a resummed kinetic equation using hard-thermal-loop scatterings.
-
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.
-
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 ...
-
Geometric bias and centrality dependence of jet quenching in high-energy nuclear collisions
A refined HIJING initial-condition model with geometric bias from impact-parameter effects, combined with Boltzmann jet transport, describes the centrality dependence of charged-hadron suppression in 5.02 TeV Pb+Pb co...
-
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.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.