8-13 August 2011
Rhode Island Convention Center
US/Eastern timezone

Precision Calibration of the Luminosity Measurement in ATLAS

11 Aug 2011, 11:00
557 (Rhode Island Convention Center)


Rhode Island Convention Center

Parallel contribution Accelerator Physics Accelerator Physics


Eric Torrence (University of Oregon)


A precision luminosity measurement is of critical importance for the ATLAS physics program, both for searches for new physics as well as for precision measurements of Standard Model cross-sections. The calibration of the luminosity is based on three so-called van der Meer scans that were performed in 2010. These scans determine the convolved beam sizes in the vertical and horizontal directions, and together with precise knowledge of the beam currents are used to determine an absolute luminosity scale. Based on this analysis ATLAS has determined the luminosity with a total uncertainty of 3.4% for the 2010 data recorded at root(s) = 7 TeV.

Primary author

Eric Torrence (University of Oregon)

Presentation Materials