Hannsjorg Weber

Hannsjörg Weber

Research Associate/Post Doc

Telephone: (630) 840-3502  E-mail: haweber@fnal.gov  Office Location: WH11W

Areas of Focus: Tracker, Standard Model, and BSM



I started my research as a graduate student with the CMS experiment in 2010. In 2015, I graduated with a PhD in physics from ETH Zurich and joined Fermilab.

One of my research areas has been on searches for supersymmetry, particularly searches for the supersymmetric partners of the top quark. I have led the CMS-wide effort as a convener of searches for third generation fermion partners between 2017 and 2019. I now focus on studies of multiboson interactions, and my contributions have resulted in the first ever observation of events with three massive gauge bosons.

Besides my contribution to analyzing CMS experimental data, I worked on the most recent upgrade of the inner CMS tracking detector, the Phase-1 pixel detector, and led initiatives in both the assembly and commissioning of the forward pixel detector.

Currently, I work on the next upgrade of the CMS tracking detector, specifically on the characterization of the so-called micropixel subassemblies. These devices will contain about 80% of the readout channels of the CMS outer tracker and will be vital to the reconstruction of charged particles, including reconstruction at level-1 of the CMS triggering system.

I am an LHC Physics Center (LPC) Distinguished Researcher and the chair of the LPC Physics Forum seminar series.

Selected recent publications:

The CMS Collaboration:  “Observation of heavy triboson production in leptonic final states in proton-proton collisions at √(s) = 13 TeV”, CMS-PAS-SMP-19-014 (2020), publication in Phys. Rev. Lett. in preparation

The CMS Collaboration:  “Search for direct top squark pair production in events with one lepton, jets and missing transverse energy at 13 TeV with the CMS experiment”, JHEP  05 (2020) 032

The CMS Collaboration:  “Search for the production of WWW events at √(s) = 13 TeV”, Phys. Rev. D 100 (2019) 012004

The CMS Collaboration:  “Searches for supersymmetry using the MT2 variable in hadronic events produced in pp collisions at 8 TeV”, JHEP 05 (2015) 078

The CMS Collaboration:  “CMS Technical Design Report for the Pixel Detector Upgrade”, CERN-LHCC-2012-016 / CMS-TDR-11 (2012)