University of Wisconsin - Madison

The University of Wisconsin-Madison is involved in both the ATLAS and CMS experiments. The University of Wisconsin-Madison ATLAS group includes three faculty members, 7 scientists and postdocs, and 11 students. The University of Wisconsin-Madison joined CMS in 1993. UW-CMS currently consists of four professors, seven scientists/postdocs, eleven graduate students, four engineers, a technician and a group of engineers, technicians and draftspeople from the UW Physical Sciences Laboratory.

The ATLAS Experiment

Construction Contributions

Our group designed, implemented and maintains the Silicon Read Out Drivers and also designed and implemented the Pixel Read Out Drivers. We also had a leading role in the design, implementation and maintenance of the high-level trigger infrastructure and data acquisition software.

We were involved in the development of algorithms for the reconstruction of the Missing Transverse Energy, which is an essential tool for many physics searches.

We also designed and implemented one of the algorithms used for the identification of muons using only the liquid argon calorimeters.

UW ATLAS group

UW ATLAS group. Image courtesy of UW Madison

Current Projects and Future Goals

We are strongly involved in the maintenance and commissioning of the Silicon Read Out Driver software, of the High Level Trigger software, and in the study of the necessary steps for early physics analysis.

We are also involved in the commissioning of the Missing Transverse Energy reconstruction using cosmic ray data.

We maintain a close collaboration with the US ATLAS computing operations team, which has allowed us to help improve the PROOF tools available for analysis.

In terms of physics analyses, our group has a strong participation in Higgs, SUSY and Exotic searches, and in detector performance studies; in particular, lepton reconstruction and electron, photon, and jet calibration, with a marked emphasis on high pT leptons and jets.

To continue with our current physics program on Higgs, SUSY and Exotic physics, and to strengthen our involvement in performance and Standard Model studies, as well as in trigger development, validation and maintenance.

The CMS Experiment

Construction Contributions

Our group contributed to the construction of the Endcap Steel Yoke, its infrastrucre and alignment. We were also responsible for the installation and commissioning of the endcap CSC chambers, the regional calorimeter first level trigger, and the Wisconsin CMS tier-2 computer center.

Current Projects and Future Goals

At the moment, the CMS group is working on maintenance and operation of the regional calorimeter trigger, level 1 trigger and higher level trigger algorithms. We are responsible for the maintenance and operation of the endcap muon system and its alignment, as well as the maintenance and operation of the Wisconsin CMS tier-2 computer center. We manage MC production, and conduct electroweak physics analysis and coordination.

We are measuring Drell Yan cross sections and asymmetries, W/Z inclusive cross sections, charge and forward-backward asymmetries, W/Z+ jets cross sections, boson PT and angular distributions, W/Z+ heavy flavor jets cross sections, multi-boson production (W?, Z?, WW, WZ, ZZ). We are involved in the search for supersymmetry using sign dileptons. We will also be involved in searching for supersymmetry using vector boson higgs production.

For the Super LHC upgrade, we will design and construct the endcap muon ME4/2 chamber system and the calorimeter trigger upgrade. 

Ten physicists in front of cylindrical structure with wires radiating out

UW designed endcap disks support muon chambers and calorimeters
Image courtesy of UW Madison 


UW CMS group

UW CMS group members. Image courtesy of UW Madison


UW CMS group members at CERN.   Image courtesy of UW Madison