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 Professor Experimental High Energy Physics: The ATLAS Experiment at the CERN Large Hadron Collider. Telephone: (416)978-6029 e-mail: orr@physics.utoronto.ca Research 
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 B.Sc. Imperial College, University of London, UK. (1968), Ph.D. Imperial College, University of London, UK. (1972), Post Doctoral, Rutherford Laboratory, UK. (1972-1974), University of Wisconsin, Madison, USA. (1974-1975), CERN Fellow and Staff Physicist, European Organization for Nuclear Research, Geneva (1976-1981), Research Scientist, Institute of Particle Physics (1981-1995),Visiting Scientist, CERN (1997-1998), JSPS Invitation Fellow, KEK - Japan (2005-2006). 
My research is part of a wide collaborative experimental effort to understand what lies beyond our present ideas on the most fundamental structure of matter. In the twenty years from 1975, the interplay between experiment (see for example my first two "Selected Publications") and theory, has led to a synthesis known as the standard model; it encompasses all presently known phenomena in particle physics. It also points to the existence of new phenomena which should be accessible to the generation of experiments now under construction. My own work is part of the ATLAS collaboration. ATLAS is a large general purpose detector which will operate at the CERN Large Hadron Collider, starting in 2005. At Toronto I work on the construction of an innovative particle detector which will be instrumental in the search for at least two of the new phenomena mentioned above; Supersymmetry, and the origin of electroweak symmetry breaking ( the mechanism which generates the masses of particles). This detector is the outcome of a long term at programme at Toronto aimed at developing very radiation hard particle detectors. Only such detectors can function close to the high intensity LHC beams. In addition to my work on ATLAS, I am part of the CDF collaboration at Fermilab. In the upcoming CDF runs, we hope to get a first glimpse of the new phenomena expected at the LHC. Research projects I have previously been involved in: ZEUS .Apart from Physics, I'm interested in: Japanese , Animals , Jeeps , and Mountains .
``Observation of
`` Comparison of
ZEUS Data with Standard Model Predictions for
``High Energy Beam
Tests of the ATLAS Tungsten Forward Calorimeter.", J.K.
Mayer et al., Proceedings of "5th
International Conference on Advanced Technology and
Particle Physics", Como, Italy, October 5-9, 1998
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Mixing'', H.
Albrecht et al., Phys. Lett. 129B, (1987)
245-252. 
Scattering at High x and
", J. Breitweg et al.,
Z. f. Physik C74 (1997) 207-220.
