Superstring theories are candidate unified theories of all interactions, including Einstein's theory of gravitation. These theories are still not well understood, and it has proven difficult to extract experimental predictions from these theories. Dine's research into string theories has been aimed at developing a more complete understanding of these theories. In addition to contributing to the technical development of the subject, Dine has pointed out some of the obstacles to developing a phenomenology, and possible solutions.
Dine has also worked extensively on problems in cosmology. This work has included possible origins for the asymmetry between matter and antimatter. As pointed out long ago by Andrei Sakharov, within the framework of the big bang theory one can understand why the universe contains mostly matter, rather than equal amounts of matter and antimatter, provided that certain conditions are satisfied. Dine's efforts in this area have focused on two mechanisms, one exploiting baryon number violation in the standard model, the other (widely known as the "Affleck-Dine mechanism") involving coherent production of baryon number. Dine's work has also included enumeration of possible dark matter candidates, studies of cosmology and string theory, and issues in inflationary cosmology.
Experimental Signatures of Low Energy Gauge Mediated Supersymmetry Breaking, Savas Dimopoulos, Michael Dine, Stuart Raby and Scott Thomas, Phys. Rev. Lett. 76, 3494 (1996), e-Print Archive: hep-ph/9601367.
Constraints on Theories with Large Extra Dimensions, Tom Banks, Michael Dine and Ann Nelson, JHEP 06, 014 (1999), e-print archive hep-th/9903019.
Seeking the Ground State of String Theory, Michael Dine, Plenary talk at 13th Nishinomiya-Yukawa Memorial Symposium on Dynamics of Fields and Strings, Nishinomiya, Japan, 12-13 November, 1998, Progr. Theor. Phys. Suppl. 134, 1 (1999), e-Print Archive: hep-th/9903212.
Possible Scales of New Physics, Michael Dine, Plenary talk given at the American Physical Society (APS) Meeting of the Division of Particles and Fields (DPF 99), Los Angeles, CA, 5-9 Jan 1999, e-Print Archive: hep-ph/9905219.
Supersymmetry, The Next Layer of Structure, Michael Dine, in Beamline, Winter 1999, R. Donaldson, ed., (available at http://www.slac.stanford.edu/beamline).
Towards a Solution of the Moduli Problem of String Cosmology, Michael Dine, Phys. Lett. B482, 213 (2000), e-Print Archive: hep-th/0002047.
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