An improved method to access initial states in relativistic heavy-ion collisions
arXiv:2208.05157 · doi:10.1140/epjc/s10052-022-10824-w
Abstract
Observables in heavy-ion collisions are generally categorized into centralities, which reflect an average over events within a range of impact parameter including a wide variety of initial state configurations. A multiple binning method using spectator neutrons within each centrality has been previously shown to provide access to events with rare initial state conditions. This work suggests an improvement in quantifying the difference between standard centrality and spectator neutron binning towards accessing the initial state properties. A selection of events with higher initial state density at fixed participating nucleon number was observed to result in larger final state particle production and smaller elliptic flow. The relative difference between observables in centrality and spectator binning shows reduced sensitivity for the observables dominated by impact parameter fluctuations in initial state such as triangular flow. This property makes the spectator binning method a good candidate to separate geometric contributions from random fluctuations in initial state towards final state observables.
14 pages, 6 figures
References in corpus (26)
- Glauber Modeling in High Energy Nuclear Collisions
- A Multi-Phase Transport Model for Relativistic Heavy Ion Collisions
- Collective flow and viscosity in relativistic heavy-ion collisions
- Methods for analyzing anisotropic flow in relativistic nuclear collisions
- Viscosity Information from Relativistic Nuclear Collisions: How Perfect is the Fluid Observed at RHIC?
- Collision geometry fluctuations and triangular flow in heavy-ion collisions
- Flow at the SPS and RHIC as a Quark Gluon Plasma Signature
- Hydrodynamic Modeling of Heavy-Ion Collisions
- Hadron production in nuclear collisions at RHIC and high density QCD
- Applying Bayesian parameter estimation to relativistic heavy-ion collisions: simultaneous characterization of the initial state and quark-gluon plasma medium
- ZPC 1.0.1: a parton cascade for ultrarelativistic heavy ion collisions
- Alternative ansatz to wounded nucleon and binary collision scaling in high-energy nuclear collisions
- Mapping the hydrodynamic response to the initial geometry in heavy-ion collisions
- Triangular flow in event-by-event ideal hydrodynamics in Au+Au collisions at GeV
- The centrality dependence of elliptic flow, the hydrodynamic limit, and the viscosity of hot QCD
- Improved version of the PHOBOS Glauber Monte Carlo
- A transverse momentum differential global analysis of Heavy Ion Collisions
- Determining initial-state fluctuations from flow measurements in heavy-ion collisions
- Glauber modeling of high-energy nuclear collisions at sub-nucleon level
- Triangular flow in heavy ion collisions in a multiphase transport model
- Comparison of results from a 2+1D relativistic viscous hydrodynamic model to elliptic and hexadecapole flow of charged hadrons measured in Au-Au collisions at = 200 GeV
- Higher order net-proton number cumulants dependence on the centrality definition and other spurious effects
- Selecting specific initial configuration using spectator neutrons in U+U collisions
- Eccentricities, fluctuations and A-dependence of elliptic and triangular flows in heavy-ion collisions
- Elliptic and Hexadecapole flow of charged hadron in viscous hydrodynamics with Glauber and Color Glass Condensate initial conditions for Pb-Pb collision at =2.76 TeV
- Probing Pb+Pb collisions at GeV with spectators