# Quark Matter 2012

12-18 August 2012
US/Eastern timezone

## Midrapidity antibaryon-to-baryon ratios in pp and Pb-Pb collisions measured by the ALICE experiment

15 Aug 2012, 12:00
20m
Regency 2/3 ()

### Regency 2/3

Oral Presentation Global and collective dynamics

### Speaker

Michal Broz (Comenius University (SK))

### Description

The ALICE Experiment features low material budget and high resolution tracking, which allow for precise measurements of charged particle production. The measurement of the antibaryon to baryon ratios ($\bar{B}$/B), in particular, probes the baryon transport and the degree of baryon stopping in high energy collisions, providing insight into the collision dynamics and the structure of baryons. In this talk, we discuss the measurement of diferent $\bar{B}$/B ratios ($\bar{p}/p,$\bar{\lambda}/\lambda$,$\xi^+/\xi^-$,$\omega^+/\omega^-\$) in pp collisions at \sqrt{s} = 0.9, 2.76, and 7 TeV and in Pb-Pb collisions at \sqrt{s_{NN}} = 2.76 TeV, as a function of charged particle multiplicity, rapidity and transverse momentum. Results from pp and Pb-Pb collisions are presented and compared to models.

### Primary author

Collaboration ALICE (CERN, Geneva, Switzerland)

### Co-author

Christine Nattrass (University of Tennessee (US))

 Slides