The luminosity is a key ingredient to many physics measurements obtained at accelerator-based particle physics experiments as it links the cross sections of physics processes with the rate of interactions observed in a collider. The luminosity systematics propagate directly to the ultimate precision of physics results, where it is expected to constitute the single largest error in some cases, owing to recent theoretical progress and the increased statistics expected from HL-LHC and other future accelerator facilities.
In this project we aim at modelling and studying the impact of beam-beam effect on the luminosity precision measurements. Simulations of multiple interaction points and cross talk between experiments should be explored. Estimate the luminosity uncertainties and benchmark to available data (LHC van der Meer scans). Extend the understanding of luminosity uncertainties to bunch trains for a possible monitoring of the detector performance during operation. Commission and exploit beam monitoring instrumentation at CMS for precision luminosity measurement and for benchmarking of the luminosity models. Contribute to the Run-3 precision luminosity analysis at CMS and detector performance studies on new Fast Beams Conditions Monitor using silicon sensors.
For more information, please contact [email protected] and consult www.chart.ch