ALICE CollaborationArmesto Pérez, NéstorGonzález Ferreiro, ElenaPajares Vales, CarlosSalgado López, Carlos Alberto2020-04-202020-04-202014Abelev, B., Adam, J., Adamová, D. et al. Event-by-event mean ppT fluctuations in pp and Pb–Pb collisions at the LHC. Eur. Phys. J. C 74, 3077 (2014). https://doi.org/10.1140/epjc/s10052-014-3077-y1434-6044http://hdl.handle.net/10347/21536Event-by-event fluctuations of the mean transverse momentum of charged particles produced in pp collisions at s√ = 0.9, 2.76 and 7 TeV, and Pb–Pb collisions at √sNN= 2.76 TeV are studied as a function of the charged-particle multiplicity using the ALICE detector at the LHC. Dynamical fluctuations indicative of correlated particle emission are observed in all systems. The results in pp collisions show little dependence on collision energy. The Monte Carlo event generators PYTHIA and PHOJET are in qualitative agreement with the data. Peripheral Pb–Pb data exhibit a similar multiplicity dependence as that observed in pp. In central Pb–Pb, the results deviate from this trend, featuring a significant reduction of the fluctuation strength. The results in Pb–Pb are in qualitative agreement with previous measurements in Au–Au at lower collision energies and with expectations from models that incorporate collective phenomena.eng© CERN for the benefit of the ALICE collaboration 2014. This article is published with open access at Springerlink.com. This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. Funded by SCOAP3 / License Version CC BY 4.0.https://creativecommons.org/licenses/by/4.0/journal article10.1140/epjc/s10052-014-3077-y1464-6052open access