Under extreme temperature conditions, as the ones of the universe few fractions of second after the Big-Bang, matter behaves as a deconfined state of matter, the Quark-Gluon
Plasma (QGP). The QGP can be produced in heavy nucleus collisions in the most powerful particle accelerator, the Large Hadron Collider (LHC) at CERN (European Organization for
Nuclear Research) in Geneva. ALICE (A Large Ion Collider Experiment) is the dedicated LHC experiment for QGP study. Muons are good proxy to study QGP. A number of QGP
observables imply measurements of particles decaying into muons, such as quarkonia (J/Ψ, Ψ’, Y), open heavy-flavour (D and B mesons) and low mass resonances (ρ, ω, Φ). ALICE is
equipped with a forward muon spectrometer for the detection of muons down to low transverse momentum in the pseudo-rapidity range 2.5 < ᵑ < 4. During the two first periods of the LHC running (2009-2012 and 2015-2018) the muon spectrometer collected large data sample allowing for detail studies in various systems (proton-proton, proton-Nucleus, Nucleus - Nucleus) extending our understanding of QGP formation and revealing unexpected features of particle behavior in small systems.
The LHC Run 3 will start in 2021 with improved machine conditions (increase of luminosity and energy) and upgraded detectors (continuous readout) leading to an increase of
a factor 100 of the available statistics. In addition, a new detector will be operational: the Muon Forward Tracker (MFT), that will be installed between the interaction point and the upgraded muon spectrometer (2.5 < ᵑ < 3.6). The MFT will allow a pointing of muons to the collision vertex (and improve sensitivity of muon measurements?). In this seminar, I will introduce the physics of QGP and measurements implying muon detection. I will present the conditions of muon measurements with ALICE during the next LHC runs and briefly review expected impact.
I will then investigate physics opportunities in this context. (on the light of recent LHC measurements ?)