4-11 July 2012
Melbourne Convention and Exhibition Centre
Australia/Melbourne timezone
ICHEP2012 - 36th International Conference for High Energy Physics

Measurement of boson production in lead-lead collisions at sqrt(s_NN)=2.76 TeV with the ATLAS detector

6 Jul 2012, 09:00
15m
Room 217 (Melbourne Convention and Exhibition Centre)

Room 217

Melbourne Convention and Exhibition Centre

Melbourne Australia
Parallel Sessions Track 9. Heavy Ion Collisions Room 217 - Heavy Ion Collisions / B-Physics / CP Violation - TR5/7/9

Speaker

Prof. Max Klein (University of Liverpool (UK))

Description

Direct production of bosons are a powerful tool in heavy ion collisions. Their rates provide access to the initial state parton distribution functions, which are expected to be modified by nuclear effects.  They also provide a means to calibrate the expected energy of jets that are produced in the medium, and thus are a tool to probe the physics of jet quenching more precisely both through jet rates and fragmentation properties.  The ATLAS detector measures photons and Z->ee decays with its hermetic, longitudinally segmented calorimeter, which has excellent spatial and energy resolution, providing detailed information about the shower shape of each measured photon. ATLAS also measures the Z->mumu and W->munu in the same pseudorapidy range using the its muon system.  First results on the rates of isolated direct, Z and W from approximately 140 µb-1 of lead-lead data will be shown, as a function of transverse momentum, pseudorapidity and centrality, and their rates compared to expectations from perturbative QCD.

Primary author

Prof. Max Klein (University of Liverpool (UK))

Presentation materials