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Elliott Cheu

Professor of Physics

Address

University of Arizona
Department of Physics, PAS #81
1118 E. 4th Street
Tucson, AZ 85721

Phone: (520) 621-4274
FAX: (520) 621-4721
e-mail: elliott@physics.arizona.edu
Office: PAS460


Teaching


Publications

Current Research

My current research interests involve studies Higgs decays to Supersymmetric particles. If we were to discover such decays, it would have a profound impact on understanding the origins of mass as well as problems such as Dark Matter. My research takes place primarily at the ATLAS detector, which is one of the experiments at the LHC (Large Hadron Collider).

My previous interests revolved around the study of of CP and CPT violation. CP violation was first discovered in 1964, yet its origins remain a mystery even today. In order to explain the predominance of matter over anti-matter in the universe, some level of CP violation is required. There are two forms of CP violation, indirect and direct. My work on the KTeV experiment involved the search for evidence of direct CP violation. In 1999 our experiment established the existence of direct CP violation.

CPT invariance is an inherent symmetry of all local gauge invariant field theories. However, string theories which are not necessarily local may exhibit CPT violation. As part of the E773 collaboration at Fermilab, I was involved in making one of the most sensitive tests of CPT invariance (M_K0 - M_K0bar)/M_K0 less than 10**(-18). For comparison a similar test using protons has a limit of (M_p - M_pbar)/M_p less than 10**(-8). The KTeV experiment subsequently improved upon these measurements.

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