Speaker
Description
Multiple measurements of high-multiplicity pp and p-A collisions at LHC energies have revealed that these small collision systems exhibit some of the quark-gluon plasma features, e.g.\ collective behaviour and strangeness enhancement, formerly thought to be achievable only in heavy-ion collisions. The dependence on multiplicity is indicative of significant final-state interactions. A proposed method to narrow down the origin of the phenomena is to study the effect of Multi-Parton Interactions (MPIs). Although the MPIs cannot be measured directly, the event observable $R_\mathrm{T}$, quantifying the magnitude of the underlying event, has been suggested as an experimental proxy.
In this presentation, we report on the identified light-flavour hadron transverse momentum spectra as a function of $R_\mathrm{T}$ in pp collisions at $\sqrt{s}=13$~TeV measured with the ALICE detector at the LHC. The results are also compared with MC predictions of theoretical models, for which our measurements have an excellent discriminatory potential.
