6533b7d0fe1ef96bd125a548

RESEARCH PRODUCT

Evolution of fluctuations in the initial state of heavy-ion collisions from RHIC to LHC

Francçois GelisCyrille MarquetJean-yves OllitraultGiuliano GiacalonePablo Guerrero-rodríguezMatthew Luzum

subject

heavy ion: scatteringScale (ratio)Field (physics)Nuclear Theory[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th]FOS: Physical sciences[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]7. Clean energy01 natural sciencesColor-glass condensateHigh Energy Physics - ExperimentNuclear physicsNuclear Theory (nucl-th)High Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)0103 physical sciencesEffective field theory[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]Nuclear Experiment (nucl-ex)010306 general physicsinitial stateNuclear ExperimentNuclear ExperimentBrookhaven RHIC CollPhysicsLarge Hadron Collider010308 nuclear & particles physicsfluctuationelliptic flowparticle: multiplicityElliptic flowObservableHigh Energy Physics - PhenomenologyCERN LHC Coll[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]color glass condensateParticlescale: saturation

description

Fluctuations in the initial state of heavy-ion collisions are larger at RHIC energy than at LHC energy. This fact can be inferred from recent measurements of the fluctuations of the particle multiplicities and of elliptic flow performed at the two different energies. We show that an analytical description of the initial energy-density field and its fluctuations motivated by the color glass condensate (CGC) effective theory predicts and quantitatively captures the measured energy evolution of these observables. The crucial feature is that fluctuations in the CGC scale like the inverse of the saturation scale of the nuclei.

https://dx.doi.org/10.48550/arxiv.1911.04720