Speaker
Description
High-multiplicity proton–proton and proton–lead collisions at LHC energies exhibit similar signatures to those observed in Pb--Pb collisions (i.e. strangeness enhancement, collective expansion effects etc.), that are traditionally attributed to the formation of the quark–gluon plasma. In this contirbution the measurements of $\pi^{\pm}$, $K^{\pm}$, and p($\bar{p}$) transverse momentum spectra in the rapidity region $|y|< $ 0.5 for high multiplicity pp collisions at $\sqrt{s} = $13 TeV with the ALICE detector will be presented. Particles are identified using the specific energy loss (dE/dx) in the Inner Tracking System (ITS) detector and Time Projection Chamber (TPC), and using the time-of-flight information from the Time of Flight (TOF) detector. Measurements in high multiplicity pp collisions will allow to study the system-size dependence of light flavor particle prdouction by extending the measurements up to the multiplicity of peripheral Pb--Pb collision. Integrated particle yields and their ratios will be presented as a function of charged particle multiplicity and compared to the expectation from QCD-based pp event generators.
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