Speaker
Hans Hjersing Dalsgaard
(Niels Bohr Institute, University of Copenhagen)
Description
Hans Hjersing Dalsgaard\footnote{\texttt{hans.dalsgaard@cern.ch}}\\
(for the ALICE collaboration)
We present the first measurements of the pseudorapidity ($\eta$) distribution in a wide range for different centralities in Pb-Pb collisions at $\sqrt{s_{NN}} = 2.76$ TeV. Using the SPD and FMD detectors of ALICE we can cover a wide region in $\eta$: $-3.4<\eta<5$. The distributions yield the total number of
produced charged particles in Pb+Pb collisions at the LHC energy. The
dependence of $dN_{ch}/d\eta$ on the number of participant nucleons or
on the number of binary collisions is sensitive to models describing the mechanism underlying particle production (eg. gluon
saturation models). In this contribution ALICE data will be compared to current models and an analysis of longitudinal scaling will be performed.
Primary author
Hans Hjersing Dalsgaard
(Niels Bohr Institute, University of Copenhagen)
