HEP Seminar: Monday, February 1, 2021 - Mono-Z, the Endcap Muon Track Finder and AutoDQM

Event Date: 

Monday, February 1, 2021 - 12:00pm

Event Location: 

  • Zoom
  • HEP Seminar

Mono-Z, the Endcap Muon Track Finder and AutoDQM

Chad Freer, Northeastern University


The existence of dark matter (DM) is well established from astrophysical observations, where the evidence relies entirely on gravitational interactions. In spite of the abundance of DM implied from these observations, its nature remains unknown. This mystery is the subject of an active experimental program to search for DM particles. The search presented here considers a “mono-Z” scenario where a Z boson, produced in proton-proton collisions, recoils against DM or other beyond the standard model (BSM) invisible particles. The analysis is based on proton-proton collision data at a center-of-mass energy of 13 TeV, collected by the CMS experiment at the LHC in 2016--2018. This seminar will describe the analysis of the results and are interpreted in the context of several models for DM production, as well as for several other scenarios of BSM physics that also predict invisible particles. The second part of the seminar will focus on the muon trigger system in the endcap regions known as the Endcap Muon Track Finder (EMTF). In addition, the development of an automated monitoring tool, the AutoDQM, designed to reduce the shifter workload in future data runs will be presented.