# Quark Matter 2012

12-18 August 2012
US/Eastern timezone

## Luminosity determination in pp and Pb-Pb collisions at the LHC with the ALICE detector

16 Aug 2012, 16:00
2h
Regency 1/3 and Ambassador ()

### Regency 1/3 and Ambassador

Poster Experiment upgrades, new facilities, and instrumentation

### Speaker

Emilia Leogrande (Universita e INFN (IT))

### Description

Luminosity is an essential ingredient for the measurement of the cross section of physical processes. Luminosity determination in ALICE at the LHC is based on the visible cross sections measured in dedicated calibration experiments (van der Meer scans). Besides serving as reference for the determination of integrated luminosities, the cross sections measured in van der Meer scans can, with suitable extrapolation, provide direct access to physical quantities such as the inelastic interaction cross section. Van der Meer scans have been performed at the LHC in pp collisions at sqrt(s) = 2.76, 7 and 8 TeV and in Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV. A detailed description of the ALICE setup and analysis will be given; the measurement uncertainties will be discussed and compared to the requirements of the ALICE physics program.

### Primary author

Collaboration ALICE (CERN Geneva, Switzerland)

### Co-author

Martino Gagliardi (Universita e INFN (IT))

### Presentation Materials

There are no materials yet.