Kőfaragó Mónika (University of Utrecht, CERN ALICE): Modification of the near-side jet peak at $\sqrt{s_{\rm{NN}}}=2.76$ TeV Pb--Pb collisions measured by the ALICE detector
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Europe/Budapest
Tanacsterem
Tanacsterem
Description
Two-particle angular correlation measurements are sensitive
probes of the interactions of the medium formed in heavy-ion
collisions and the particles propagating through it. Such
measurements are done by determining the distribution of the
pseudorapidity ($\Delta\eta$) and azimuthal angle
($\Delta\varphi$) difference of all particle pairs as a
function of centrality and $p_{\rm{T}}$. The contribution of
jets and mini-jets appears as a peak around ($\Delta\varphi,
\Delta\eta) = (0,0)$ and the modification of the shape of
this peak in Pb--Pb collisions can give insight on the
interaction of propagating particles with the medium. The
observed jet peak becomes significantly broader in the
$\Delta\eta$ direction towards central collisions at low
$p_{\rm{T}}$. To characterize this broadening, the peak is
fitted with a Generalized Gaussian function and the width of
the peak is compared to results from pp collisions and to
different Monte Carlo generators to study whether the
interplay of jets and collective flow can result in the
observed behavior.