Speaker
Adam Trzupek
(Henryk Niewodniczanski Inst. Nucl. Physics, PAN)
Description
ATLAS has performed a detailed measurement of event-by-event flow in
lead-lead collisions at the LHC. The Fourier coefficients, v2-v4, of the
azimuthal angle distribution of charged particles measured in the
ATLAS inner detector (|eta| < 2.5) are extracted in each of 48 million
minimum-bias Pb+Pb collisions. The v2-v4 distributions are measured for a
variety of centrality intervals over three transverse momentum ranges,
pT > 0.5 GeV, pT > 1 GeV and 0.5 < pT < 1 GeV. The measurements of the
vn distributions, unfolded for experimental resolution will be
presented. The relationship between the shapes of the vn distributions
and the collision geometry and initial-state fluctuations
will be discussed. The results will be compared with theoretical
calcualtions of initial-state eccentricity distributions and
theoretical calculations of the vn distributions using hydrodynamics.
Primary author
Adam Trzupek
(Henryk Niewodniczanski Inst. Nucl. Physics, PAN)
