# Quark Matter 2017

5-11 February 2017
Hyatt Regency Chicago
America/Chicago timezone

## Measurements of Balance Functions for Identified Particles in Pb-Pb Collisions at $\sqrt{s_{NN}}=$ 2.76 TeV at ALICE

Not scheduled
2h 30m
Hyatt Regency Chicago

#### Hyatt Regency Chicago

151 East Wacker Drive Chicago, Illinois, USA, 60601
Board: I16
Poster

### Speaker

Jinjin Pan (Wayne State University (US))

### Description

Measuring balance functions of different hadronic species holds the prospect of providing a quantitative insight into the chemical evolution of the Quark Gluon Plasma created in ultra-relativistic heavy ion collisions$[1]$. Balance functions have been measured for identified charged-pion pairs and for identified charged-kaon pairs in Pb-Pb collisions at $\sqrt{s_{NN}}=$ 2.76 TeV by the ALICE detector at the Large Hadron Collider (LHC). These balance functions are presented in relative rapidity $\Delta y$ and relative azimuthal angle $\Delta\phi$. The charged-pion balance function widths in terms of $\Delta y$ and $\Delta\phi$ appear to be narrower in central Pb-Pb collisions compared to peripheral collisions. Furthermore, we present a comparison between the balance functions of charged-pions, charged-kaons and unidentified charged particles. The results of this analysis agree with the effects of delayed hadronization and radial flow, as well as the two-wave nature of quark production proposed in $[1]$. Detailed model comparisons will also be shown to draw more quantitative conclusions.

$[1]$ Pratt, Phys. Rev. C 85 (2012) 014904

Preferred Track Correlations and Fluctuations ALICE

### Primary author

Jinjin Pan (Wayne State University (US))