New method for measuring azimuthal distributions in nucleus-nucleus collisions
By N. Borghini, P. Dinh, Jean-Yves Ollitrault Lptpe, París, Saclay. 2000
232 citations recorded by the source corpus.
The methods currently used to measure azimuthal distributions of particles in heavy-ion collisions assume that all azimuthal correlations between particles result from their correlation with the reaction plane. However, other correlations exist, and it is safe to neglect them only if azimuthal anisotropies are much larger than $1/\sqrt{N},$ with N the total number of particles emitted in the collision. This condition is not satisfied at ultrarelativistic energies. We propose a new method, based on a cumulant expansion of multiparticle azimuthal correlations, which allows measurements of much smaller values of azimuthal anisotropies, down to $1/N.$ It is simple to implement and can be used to measure both integrated and differential flow. Furthermore, this method automatically eliminates the major systematic errors, which are due to azimuthal asymmetries in the detector acceptance.
Subfields: Aerospace Engineering, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/8a46f2f56c24007b785412b023717407e3950791
How researchers see this paper
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In Aerospace Engineering
In Nuclear and High Energy Physics
- D. Mateos
- Kumbakonam R. Rajagopal
- Ulrike Romatschke
- S. Gubser
- V. Hubeny
- J. Casalderrey-Solana
- Hong Liu
- Paul Romatschke
Citations in the corpus
- Gauge/String Duality, Hot QCD and Heavy Ion Collisions (2011, methodology): “For more details, we refer the reader to the original literature [75].”
- Mapping the phases of quantum chromodynamics with beam energy scan (2019, background): “stantial corrections. In addition event-byevent fluctuations of the initial shape of the fireball introduce additional subtleties in determining the flow coecients. Therefore, as discussed in detail in [273, 278], the extraction of the v n from higher order correlations, if possible, is preferred. Howe”
- Relativistic Fluid Dynamics in and out of Equilibrium (2017, methodology): “An efficient algorithm to calculate these 2- and 4-particle correlations employs the concepts of Q-cumulants [357–359]”
- Centrality dependence of dihadron correlations and azimuthalanisotropy harmonics in PbPb collisions at √sNN = 2.76 TeV (2012, methodology): “This is effectively equivalent to the two-particle cumulant method of flow measurement [50, 51].”