Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2011-12-27
Physics
High Energy Physics
High Energy Physics - Experiment
Scientific paper
The purpose of the ALICE experiment at the LHC is the study of the Quark Gluon Plasma (QGP) formed in ultra-relativistic heavy-ion collisions, a state of matter in which quarks and gluons are deconfined. The properties of this state of strongly-interacting matter can be accessed through the study of light vector mesons ($\rho$, $\omega$ and $\phi$). Indeed, the strange quark content ($s\bar{s}$) of the $\phi$ meson makes its study interesting in connection with the strangeness enhancement observed in heavy-ion collisions. Moreover, $\rho$ and $\omega$ spectral function studies give information on chiral symmetry restoration. Vector meson production in pp collisions is important as a baseline for heavy-ion studies and for constraining hadronic models. We present results on light vector meson production obtained with the muon spectrometer of the ALICE experiment in pp collisions at $\sqrt{s}$=7 TeV. Production ratios, integrated and differential cross sections for $\phi$ and $\omega$ are presented. Those results are extracted for $p_{\rm T} > 1$ GeV/$c$ and $2.5 < y < 4$.
for the ALICE Collaboration
Massacrier L.
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