Speaker
Description
Vertex reconstruction typically involves two steps: clustering reconstructed tracks into vertex candidates, or seeds, and fitting the vertex candidates to obtain vertex parameters. Secondary vertices are used in the identification, or tagging, of displaced jets originating from b and c quark hadronization, and in the tagging of soft jets with low transverse momenta. During the Run 2 data-taking period of the LHC, an inclusive secondary vertex finder (IVF) was used in the offline reconstruction of secondary vertices in data collected by the CMS detector. In the Phase 2 upgrade of the CMS detector for the High-Luminosity LHC operation, changes to the triggering system and track reconstruction will affect the performance of the IVF, which has not undergone major revision since Run 2. This poster presents performance studies of the Run 2 IVF in simulated data with the upgraded CMS detector configurations. Different methods aimed at improving this baseline performance are presented. Finally, jet tagging performance using Phase 2 simulations is shown.
