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High Energy Collider Physics

Welcome to the IU HEP Group Home Page

(Research by the Task A of the IU DOE Contract)

Experimental Particle Physics Research with ATLAS, D0, ILC Experiments

The IU HEP collider group investigates the fundamental constituents of matter and forces through very high energy collisions of hadronic particles. Our research takes place primarily at the ATLAS Experiment, located at the CERN laboratory in Switzerland, the DZero Experiment at Fermilab near Chicago, and the proposed International Linear Collider (ILC).

Aerial Photo of Fermilab

Fermilab collides protons and antiprotons at the current energy frontier, and our group has a rich history of measuring the lifetimes of B hadrons with the D0 Experiment. Recently, we have been involved in the first observation of Bs oscillations, the Ξb baryon discovery, and searches for CP violation in the Bc system. We also have newer interests in high-pT processes, namely the production of W bosons, vector boson fusion, and dijet angular distributions. These measurements provide stringent tests of the theory of QED and QCD, are important for tuning MC models we rely on, and serve as a test bed for the experimental techniques which will be used in the next generation of collider experiments at the Large Hadron Collider (LHC). D0 is a collaboration of about 600 physicists, engineers and technicians from 18 different countries. To learn more, visit our IU D0 page.

Our group's other main activity is preparing for the turn on of the LHC, which is anticipated for the fall of 2009. The energy reach of the LHC will supercede the Tevatron by nearly an order of magnitude. The scientific community anticipates that the discoveries made at the LHC will either complete the Standard Model with the discovery of the Higgs Boson, or change our paradigm drastically through the discovery of new particles, interactions or extra dimensions.. We have been working for several years on the building and commissioning of the Transition Radiation Tracker (TRT), which will play a vital role in all measurements made at the ATLAS experiment. Because of the TRT's special ability to measure heavily ionizing particles, our group has a keen interest in searches for charged massive stable new particles. We are also very active in searches for new resonances in highly boosted top quark events and searches for the Higgs Boson. ATLAS is a collaboration of around 2500 physicists, engineers and technicians from 38 different countries. To learn more, visit our IU ATLAS page.


Some of our group members have worked on the OPAL Experiment at CERN and the ZEUS Experiment at DESY. These backgrounds in lepton-lepton and lepton-proton scattering serve to broaden our expertise in Electroweak and Strong interactions, providing a perspective that goes beyond the world of hadron-hadron interactions. We also enjoy building detectors, and usually have ongoing hardware projects in addition to the physics analyses we pursue. Finally, we have a large presence in ATLAS computing. We run a Tier 2 Center, jointly with University of Chicago, and are very involved in ATLAS software development.

Group Photo

Last updated: 22 April 2014
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