A Power-law description of collision centrality applied to Hijing-1.37-simulated Au-Au collisions at s(NN)**(1/2) = 200-GeV
Nov, 2004Citations per year
Abstract:
The minimum-bias distribution on heavy ion collision multiplicity is well approximated by power-law form , suggesting that a change of variable to may provide more precise access to the structure of the distribution and to A-A collision centrality. We present a detailed centrality study of Hijing-1.37 Monte Carlo data at 200 GeV using the power-law format. We find that the minimum-bias distribution on , determined with a Glauber Monte Carlo simulation, is uniform except for a 5% sinusoidal variation. The power-law format reveals precise linear relations between Glauber parameters and and the fractional cross section. The power-law format applied to RHIC data facilitates incorporation of extrapolation constraints on data and Glauber distributions to obtain a ten-fold improvement in centrality accuracy for peripheral collisions.- 24.60.Ky
- 25.75.Gz
- HIJING SIMULATION
- COLLISION CENTRALITY
- PARTICIPANT SCALING
- GLAUBER MODEL
- TWO-COMPONENT MODEL
- HEAVY ION COLLISION
- scattering: heavy ion
- gold
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