Münster 2017 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 58: Heavy Ion Collisions and QCD Phases XI

HK 58.5: Talk

Friday, March 31, 2017, 15:15–15:30, F 1

Event-by-Event Fluctuations of the Mean Transverse Momentum in pp, p–Pb and Pb–Pb Collisions with ALICE — •Stefan Heckel for the ALICE collaboration — Institut für Kernphysik, Goethe-Universität Frankfurt

Event-by-event mean transverse momentum (p_T) fluctuations in pp and Pb–Pb collisions have been measured by ALICE at the LHC [1]. In both systems, non-statistical fluctuations relative to mean p_T are observed which decrease with increasing multiplicity following the same power-law like behaviour up to mid-central Pb–Pb collisions. In central Pb–Pb, a strong reduction of the fluctuations is observed.

In the present analysis, also p–Pb collisions are studied as a function of multiplicity, where a similar trend to that of pp and Pb–Pb collisions is observed. The results are examined in terms of a transition from small to large collision systems and compared to model calculations.

Supported by BMBF and the Helmholtz Association.

[1] ALICE Collaboration, B. Abelev et al., Eur. Phys. J. C 74 (2014) 3077. arXiv:1407.5530 [nucl-ex]