Beam Imaging and Luminosity Calibration

Abstract

We discuss a method to reconstruct two-dimensional proton bunch densities using vertex distributions accumulated during LHC beam-beam scans. The $x$-$y$ correlations in the beam shapes are studied and an alternative luminosity calibration technique is introduced. We demonstrate the method on simulated beam-beam scans and estimate the uncertainty on the luminosity calibration associated to the beam-shape reconstruction to be below 1\%.

Figures added, typos corrected

References in corpus (5)

• Description and performance of track and primary-vertex reconstruction with the CMS tracker
• Luminosity determination in pp collisions at $\sqrt{s}$ = 8 TeV using the ATLAS detector at the LHC
• The RooFit toolkit for data modeling
• Precision luminosity measurements at LHCb
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Cited by in corpus (1)

• Precision luminosity measurement in proton-proton collisions at $\sqrt{s}=$ 13 TeV in 2015 and 2016 at CMS