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Experimental Probes of Spacetime Geometries


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Title Experimental Probes of Spacetime Geometries
Author JoAnne Hewett
Publisher Fermi National Accelerator Laboratory (Fermilab)
Release Date 2009
Language English

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Subject Area Physics
Abstract A novel approach which exploits the geometry of extra spacetime dimensions has been recently proposed as a means to resolving the hierarchy problem, i.e., the large energy gap that separates the electroweak scale and the scale where gravity becomes strong. I will describe two models of this type: one where the apparent hierarchy is generated by a large volume for the extra dimensions, and a second where the observed hierarchy is created by an exponential warp factor which arises from a non-factorizable geometry. Both scenarios have concrete and distinctive phenomenological tests at the TeV scale. I will describe the classes of low-energy and collider signatures for both models, summarize the present constraints from experiment, and examine the ability of future accelerators to probe their parameter space.


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