He is also involved in the Cosmic Ray Electron Synchrotron Telescope (CREST), a balloon experiment designed to determine the mechanism for acceleration of cosmic ray electrons. Circling the continent of Antarctica for several weeks, CREST will measure the synchrotron radiation generated by ultrahigh-energy electrons in the Earth’s magnetic field. At energies of several TeV and above, individual sources should reveal themselves in the energy spectrum.

Professor Tarlé is also contributing to the ATLAS experiment, one of two large experiments now under construction for the Large Hadron Collider at CERN. The goal of ATLAS is to detect the Higgs particle, whose interaction with ordinary particles is believed to be the origin of mass. It will also search for hypothetical supersymmetric particles believed to constitute a large fraction of the cold dark matter in the universe.

Professor Tarlé is a Fellow of the American Physical Society.

Measurement of the Cosmic-Ray Antiproton-to-Proton Abundance Ratio between 4 and 50 GeV (A. S. Beach et al., HEAT Collaboration), Phys. Rev. Lett. 87, 271101, 1-4 (2001). Also featured in Nature Physics Portal Research Highlights, “Balloon Settles Debate” (December 10, 2001).

Cosmic Antimatter (Gregory Tarlé and Simon P. Swordy), Scientific American 278, 36-41 (April, 1998).

Magnetic Monopole Search with the MACRO Detector at Gran Sasso (M. Ambrosio et al., MACRO Collaboration), Phys. Lett. B 486, 249 (1997).

Extension of the Parker Bound on the Flux of Magnetic Monopoles (Fred C. Adams, Marco Fatuzzo, Katherine Freese, Gregory Tarlé, Richard Watkins, and M.S. Turner), Phys. Rev. Lett. 70, 2511 (1993).