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College of Arts and Sciences

Micheal S. Berger

Micheal S. Berger Professor
Elementary Particle Physics (Theoretical)

B.S., Massachusetts Institute of Technology, 1986.
M.S., University of California, Berkeley, 1988.
Ph.D., University of California, Berkeley, 1991.
Postdoctoral Position: University of Wisconsin, 1991-1994.

Phone: Swain West 235 (812) 855-2609
Email: berger at

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Our current understanding of elementary particle physics is dominated by the "standard model" of strong, weak and electromagnetic interactions: all predictions of the model agree well with the experimental data. However this model is almost certainly not the final story, because many puzzling questions remain to be answered: Why are there three generations of elementary particles with such a wide range in masses? What is the origin of mass? Why did nature choose the forces that we observe? These issues will be addressed in the near future at existing and planned collider facilities, so research at the microscopic frontier should be as exciting as it has been in the past. Most of my research is dedicated to exploring the possibility of physics beyond the Standard Model. We know that there must exist new forces that have remained hidden from us that will provide the answers to the above questions. My research is directed toward discovering and understanding these ne! w ! interactions. Recently my research has included work on supersymmetry (an extension of the familiar spacetime symmetries) and its phenomenology, grand unified theories, particle astrophysics and cosmology, and the search for the mechanism that breaks the weak interaction symmetry. I have also been looking recently at the possibility of extending our ability to probe short distance scales with a high energy collider employing muon beams.

Selected Publications

  • Supersymmetry and Lorentz Violation, M. S. Berger and V. A. Kostelecky, Phys. Rev. D65, 091701 (2002).
  • Leptogenesis and Low-Energy Observables, M. S. Berger and K. Siyeon, Phys. Rev. D65, 053019 (2002).
  • Higgs Sector Radiative Corrections and s-channel Production, M. S. Berger, Phys. Rev. Lett. 87, 131801 (2001).
  • Anomaly Free Flavor Symmetry and Neutrino Anarchy, M. S. Berger and K. Siyeon, Phys. Rev. D63, 057302 (2001).
  • Abelian Family Symmetries and Leptogenesis, M. S. Berger, Phys. Rev. D62, 013007 (2000).
  • Status of Muon Collider Research and Development and Future Plans, Phys. Rev. ST Accel. Beams 2, 081001 (1999).
  • Higgs Boson Physics in the s-channel at a mu+mu- Collider, V. Barger, M. S. Berger, J. Gunion and T. Han, Phys. Rept. 286, 1 (1997).