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Indiana University Bloomington

Harold Evans

Harold  Evans Professor
Elementary Particle Physics (Experimental)

B.S., Yale 1986
M.S., UCLA 1988
Ph.D., UCLA 1991
Postdoctoral Postion: University of Chicago

Phone: (812) 856-3828
Email: hgevans at

Curriculum Vitae
Personal Webpage
Group Webpage

I am intrigued by questions such as: "Why is there mass?" and "Why do the four fundamental forces in nature appear to be different?" Finding answers to these questions will certainly involve a deeper understanding of the phenomenon of electro-weak symmetry breaking. So it is in this area that my research interests lie. I have probed this phenomenon using a variety of tools - the tau-lepton, the b-quark, searches for new physics - and at a variety of particle accelerators - LEP, the Tevatron, LHC. I am currently a member of the large, international collaborations D0 at Fermilab outside of Chicago and Atlas at CERN near Geneva. We keenly anticipate making breakthroughs in our knowledge of electro-weak symmetry breaking in the years to come using these energy-frontier accelerators.

As an experimentalist, I am also fascinated by the devices we build to make our measurements. In particular, I am involved in several projects developing high-speed electronics to aid in the collection of the unprecedented amounts of data we will accumulate in the near future.

Selected Publications

  • "Measurement of the Upsilon(1S) Production Cross-Section in pp Collisions at sqrt(s) = 7 TeV in ATLAS", The ATLAS Collaboration, G. Aad, et al, arXiv:1106.5325[hep-ex] submitted to Phys. Lett. B.
  • "The ATLAS TRT Electronics", E. Abat, et al, Journal of Instrumentation (JINST) 3, P06007 (2008).
  • "Design and Implementation of the New D0 Level-1 Calorimeter Trigger", M. Abolins et al , Nucl. Instrum. and Methods A 584/1, 75-97 (2007).
  • "Measurement of the one-prong Hadronic tau Branching Ratio at LEP", The OPAL collaboration, K. Ackerstaff, et al, Eur. Phys. J. C4, 193 (1998)
  • "Measurements of the Inclusive Branching Ratios of Tau Leptons to K0s and Charged K*(892)", The OPAL collaboration, R. Akers, et al, Phys. Lett. B339, 278 (1994)