Measurement of $\phi$ meson nuclear modification factors in p-Pb and Pb-Pb collisions in the ALICE experiment at the LHC

20 May 2014, 16:30
spectrum (darmstadtium)



Board: A-14
Poster QCD at High Temperature and/or Density Poster session


Mikhail Malaev (B.P. Konstantinov Petersburg Nuclear Physics Institute - PNPI ()


Measurements of hadron spectra in proton-proton and nucleus-nucleus collisions at the LHC provide the means to study the mechanisms of particle production and properties of the medium formed in relativistic heavy ion collisions. The $\phi$ meson is a very rich probe since it is sensitive to several aspects of the collision such as strangeness enhancement, chiral symmetry restoration and parton energy loss. Due to its small inelastic cross section the $\phi$ meson is not strongly affected by the late hadronic rescattering and is sensitive to the initial evolution of the system. With a mass similar to that of the proton, it is interesting to see how the $\phi$ meson fits within the meson/baryon pattern of observables. Being a pure s-$\overline{s}$ state, it further constrains the energy loss and recombination pictures. The ALICE Collaboration performed systematic measurement of the $\phi\rightarrow {\rm K}^{+}{\rm K}^{-}$ meson production at mid-rapidity in pp, p-Pb and Pb-Pb collisions at LHC energies. This poster presents recent results on $\phi$ meson invariant yields and nuclear modification factors measured in a wide range of transverse momentum up to 21 GeV/$c$ in pp and p-Pb, Pb-Pb collisions at different centralities.
On behalf of collaboration: ALICE

Primary author

Mikhail Malaev (B.P. Konstantinov Petersburg Nuclear Physics Institute - PNPI ()

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