May 13 – 19, 2018
Venice, Italy
Europe/Zurich timezone
The organisers warmly thank all participants for such a lively QM2018! See you in China in 2019!

Low-mass dimuon measurements in pp and Pb-Pb collisions with ALICE at the LHC

May 15, 2018, 5:00 PM
2h 40m
First floor and third floor (Palazzo del Casinò)

First floor and third floor

Palazzo del Casinò

Poster Electromagnetic and weak probes Poster Session


Antonio Uras (Inst. Nat. Phys. Nucl et Particules (FR))


Low-mass dimuon production, including light neutral mesons $\eta,~\rho,~\omega,~\phi$, provides key information on the hot and dense state of strongly interacting matter produced in ultra-relativistic heavy-ion collisions. The proper baseline for these observations is provided by the measurements of low-mass dimuons in pp collisions, which also allows for the tuning of light particle production models in the largely unexplored LHC energy regime.

ALICE studies low-mass dimuon production at the CERN LHC with the Muon Spectrometer covering the forward rapidity range $2.5 < y < 4$. Observations in Pb-Pb collisions at $\sqrt{s_\mathrm{NN}} = 2.76$ and $5.02$ TeV allowed for the characterisation of $\phi$-meson production in the $p_{\rm T}$ range $2 < p_{\rm T} < 5$ GeV/$c$ and $2 < p_{\rm T} < 7$ GeV/$c$, respectively, giving insight on strangeness production at forward rapidity. $\phi$-meson production has also been studied in pp collisions at $\sqrt{s} = 2.76$, $5.02$, $7$, $8$ and $13$ TeV, offering the unique possibility to test the energy dependence of the production cross section in the common $p_{\rm T}$ range $1.5 < p_{\rm T} < 5$ GeV/$c$. The large statistical sample available at $\sqrt{s} = 13$ TeV also allowed for a new, dedicated study of the $p_{\rm T}$-$y$ dependence of the production cross section of the low-mass mesons.

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Collaboration ALICE

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