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Light Neutrinos without Heavy Mass Scales: A Higher-Dimensional Seesaw Mechanism
Keith R. Dienes, Emilian Dudas, Tony Gherghetta
Recent theoretical developments have shown that extra spacetime dimensions can lower the fundamental GUT, Planck, and string scales. However, recent evidence for neutrino oscillati…
Cosmological Phase Transitions and Radius Stabilization in Higher Dimensions
Keith R. Dienes, Emilian Dudas, Tony Gherghetta +1
Recently there has been considerable interest in field theories and string theories with large extra spacetime dimensions. In this paper, we explore the role of such extra dimensio…
TeV-scale GUTs
Keith R. Dienes, Emilian Dudas, Tony Gherghetta
In this talk, we summarize our recent proposal for lowering the scale of grand unification to the TeV range though the appearance of extra spacetime dimensions. Particular emphasis…
Grand Unification at Intermediate Mass Scales through Extra Dimensions
Keith R. Dienes, Emilian Dudas, Tony Gherghetta
One of the drawbacks of conventional grand unification scenarios has been that the unification scale is too high to permit direct exploration. In this paper, we show that the unifi…
Extra Spacetime Dimensions and Unification
Keith R. Dienes, Emilian Dudas, Tony Gherghetta
We study the effects of extra spacetime dimensions at intermediate mass scales, as expected in string theories with large-radius compactifications, and focus on the gauge and Yukaw…
The Supersymmetric Flavour and CP Problems From a Cosmological Perspective
Tony Gherghetta, Antonio Riotto, Leszek Roszkowski
The supersymmetric flavour and CP problems can be avoided if the first two generations of sfermions are heavier than a few TeV and approximately degenerate in mass. However using f…