News from CERN
Summer 2024 finds Run 3 of the LHC in full swing. The peak luminosity is typically greater than 2×10^34/cm^2/s and the total integrated luminosity is over 130 fb^-1. Arizona contributions to the upgraded ATLAS detector include 2M channels of front-end electronics for the Micromegas detectors on the New Small Wheel (NSW) and FPGA firmware used by the Liquid Argon Digital Trigger. My group is finishing two analyses using the Run 2 dataset: a search for one long-lived particle decaying in the Muon Spectrometer and a search for 2HDM Higgs bosons using a four-top quark final state. We hope to ramp up our participation in Run 3 physics this year including NSW performance studies.
Recent papers and notes
- Search for one neutral long-lived particle in the ATLAS Muon Spectrometer (in progress)
- Search for two neutral long-lived particles in the ATLAS Muon Spectrometer
- Search for top-quark-associated production of heavy scalar or pseudoscalar particles (in progress)
- Search for ttH/A to four-tops in the multilepton final state
- Measurement of the four-top-quark production cross section
- Phase 2 Liquid Argon readout electronics
- New Small Wheel electronics
- Phase 1 Liquid Argon digital trigger readout electronics
About me
Presently my group is analyzing 150 fb-1 of LHC data collected at root(s) = 13 TeV. We (Rachel Lindley (now graduated), Hao Zhou) are interpreting the four-top-quark production cross section in terms of beyond-the-Standard Model physics involving the 2HDM Higgs sector. We (Michael Schott, Hao Zhou) are searching for long-lived particles that decay in the Muon Spectrometer. Both of these analyses are nearing publication. For HL-LHC upgrades, we hold firmware responsibilities for the LAr Calorimeter readout electronics (LASP and SRTM) and firmware responsibilities for adaptable accelerator cards for the EF tracking project. I am also working with students Shelbi Foster and I-Tzu Huang on machine learning projects using topological clusters in the Calorimeter. There are many research opportunities for Physics and ECE students, though not all of them are paid. If you are an undergraduate or graduate student with interest in doing research with ATLAS, please talk with me or email kjohns@arizona.eduSPAMNOT