Abstract:
Proton-lead collisions at √sNN = 5.02 TeV were analysed in order to study the
dependency between the production of ϕ mesons and the number of charged par-
ticles produced in the process, called multiplicity. The study of the multiplicity
dependence on the production of particles with strangeness is important for the un-
derstanding of the formation and evolution of the Quark Gluon Plasma. For this
purpose, the observables are constructed in such a way that the detector efficiency
does not bias the study. A ratio between different multiplicity ranges (RCP, Ra-
tio Central-Peripheral) and a double ratio between the RCPs corresponding to the
different colliding beams configurations are calculated. The obtained results are
compared with other observations and discussed as a consequence of some physical
mechanism, such as the Cronin effect or saturation effects.
