LPC Distinguished Researcher


Fengwangdong Zhang


University of California, Davis

What I will be working on:

My main physics analysis is searching for an exotic decay of a SM Higgs boson and/or a heavy Higgs boson into light Higgs partners (pseudoscalars) based on the Next-to-Minimal Supersymmetric Standard Model (NMSSM). The pair of pseudoscalars decay into a boosted ΞΌΞΌπžƒπžƒ final state. Because the standard πžƒ reconstruction results in a low efficiency in a boosted πžƒπžƒ pair decaying into hadrons, my second project is developing a novel approach based on deep learning technique to tag overlapping πžƒπžƒ pairs from reconstructed jets, which will benefit many physics analyses involving a boosted πžƒπžƒ pair topology. My detector project is CMS outer tracker (OT) module reliability tests for the incoming module pre-production/production at Fermilab. I will participate in module testing at the SiDet production center, and run campaigns of beam tests for the assembled modules. I will continue contributing to the OT flat barrel integration project, especially designing and refining the multi-channel test setup using LabVIEW.

My role in CMS past and present:

  • 2013: Joined CMS as a graduate student
  • 2013: Phase-1 CMS Resistive Plate Chamber (RPC) upgrade (RE4 module assembly)
  • 2013 – 2015: Measurement of the cross section for electroweak production of Z+gamma in association with two jets and constraints on anomalous quartic
  • gauge couplings in proton-proton collisions (8 TeV)
  • 2013 – 2016: Online jet energy correction calibration at high level trigger for CMS RunII
  • 2014 – 2017: Measurement of differential cross sections for Z boson production in association with jets in proton-proton collisions (8/13 TeV)
  • 2015: Beam test of CMS Gas Electron Multiplier (GEM) modules for RunII
  • 2016 – 2019: Co-convener of CMS young scientist committee
  • 2017: Became a postdoc in CMS
  • 2017 – 2021: Search for a light pseudoscalar Higgs boson in the boosted ΞΌΞΌπžƒπžƒ final state in proton-proton collisions at 13 TeV
  • 2017 – 2021: CMS Phase-1 pixel detector installation, operation, commissioning, refurbishment
  • 2018 – 2019: Development of a new monitoring interface for CMS pixel detector
  • 2018 – 2019: Analysis in pixel leakage current evolution and its dependence on detector temperature and accumulated radiation doses
  • 2019 – 2021: HL-LHC CMS Outer Tracker 2S module prototype and qualification
  • 2019 – 2021: Official CMS guide