The measurement of $\phi$(1020) meson production in proton-proton collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector at the LHC.

The measurement of $\phi$(1020) meson production in different types of proton-proton inelastic scattering, Single Diffraction, Central Diffraction, and Non-Diffractive processes, is presented in this thesis. Proton-proton collision data collected by the ATLAS Experiment at the LHC at $\sqrt{s}$ = 13 TeV were analysed to obtain transverse momentum and rapidity spectra. The $\phi$ production rates in Single Diffraction were also measured in three ranges of proton fractional energy loss. The measured spectra were compared to predictions of two phenomenological models. The highest production rates were measured for Non-Diffractive processes while the lowest ones for Central Diffraction. Thus, one can conclude that the different $\phi$ production rates are related to the mean number of selected particles in the given sample. It suggests that $\phi$ mesons originate predominantly from the fragmentation and the sensitivity of $\phi$ production to the initial states in the given processes is not observed. The $\phi$ production measured in ND was compared to the measurement of $\phi$ production cross section in proton-proton collisions at $\sqrt{s}$ = 7 TeV. There is a good agreement between the spectra measured at $\sqrt{s}$ = 13 TeV and $\sqrt{s}$ = 7 TeV. The measurements presented in this thesis can provide valuable input to the development of the phenomenological hadroproduction models towards describing high-energy physical processes at low momentum transfer.