Collective effects in pp collisions with the balance function of the identified particles

4 Nov 2019, 17:40
Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Wanda Han Show Theatre & Wanda Reign Wuhan Hotel

Poster Presentation Small systems Poster Session


Ms Zhanna Khabanova (Nikhef)


Experiments at RHIC and the LHC have lately reported intriguing results that indicate the presence of collectivity in small collision systems. The first hints originated from two-particle azimuthal correlations studies. The charge dependent part of such correlations is studied using the balance function in the relative pseudorapidity (∆η) and azimuthal angle (∆φ) of the particle pair. This measurement has been used as an effective tool to investigate the properties of the system created in high-energy heavy-ion collisions such as the hadronization time, the freeze-out conditions and to characterise its collective motion. In addition, the study of the balance function for different particle species in A-A collisions provides valuable insight to the chemical evolution of the QGP.

In this poster, we report the measurement of the balance function of identified particles in pp collisions at √sNN = 5.02 TeV recorded by ALICE. This analysis, performed as a function of multiplicity, is an important piece in understanding if the underlying physics phenomena of particle production are of a common origin across collision systems.

Primary author

Ms Zhanna Khabanova (Nikhef)

Presentation Materials