Supersymmetry provides a pivotal context for new physics beyond the highly successful but conceptually incomplete Standard Model of Weak, Electromagnetic, and Strong Interactions. However, supersymmetry, which enforces a pairing between elementary particles of different intrinsic angular momenta, cannot be an exact symmetry of nature, for such a pairing is not observed at present. In the context of modern elementary particle theory, such a symmetry is "softly broken," and becomes manifest at extremely short distances or at very high energies or temperatures. In particular, it is thought that supersymmetry was a good symmetry during the very earliest stages of the universe, and only as the universe cooled did its broken phase become dominant. The broken phase is widely thought to originate in the formation of a "gaugino condensate" (like a liquid out of the vapor phase), with the dynamics governing the condensation being controlled by the physics of a hidden sector, perhaps originating in string theory. Professor Goldberg has examined several aspects of this phase transition, and has shown how the underlying theory must be constrained in order that this mechanism succeed.
Articles
Neutrino Cosmology after WMAP 7-year data and LHC first Z′ bounds (with Luis Alfredo Anchordoqui), Physics Faculty Publications (2012)
The gauge-extended U(1)C×SU(2)L×U(1)IR×U(1)L model elevates the global symmetries of the standard model (baryon number B...
Scalar modifications to gravity from unparticle effects may be testable (with Pran Nath), Physics Faculty Publications (2008)
Interest has focused recently on low energy implications of a nontrivial scale invariant sector of...
Decay widths of lowest massive Regge excitations of open strings (with Luis A. Anchordoqui and Tomasz R. Taylor), Physics Faculty Publications (2008)
With the advent of the LHC there is widespread interest in the discovery potential for...
Dijet signals for low mass strings at the LHC (with Luis A. Anchordoqui, Dieter Lüst, Satoshi Nawata, Stephan Stieberger, and Tomasz T. Taylor), Physics Faculty Publications (2008)
We consider extensions of the standard model based on open strings ending on D-branes, with...
Direct photons as probes of low mass strings at the LHC (with Luis A. Anchordoqui, Satoshi Nawata, and Tomasz R. Taylor), Physics Faculty Publications (2008)
The LHC program will include the identification of events with single prompt high-k_\perp photons as...