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Where Galaxies Really Come From

Tuesday 16 December 2008, 0930-0955
Lecture Theatre 1, Management School Building

Modern cosmology concludes that structure in the Universe, such as galaxies and galactic clusters, is due to a tiny perturbation in the density of the gaseous content of the Early Universe. This perturbation is thought to be of quantum mechanical origin and it is generated during a period of ultra-rapid expansion of space, called cosmic inflation.

This talk, by the Physics Department's Kostas Dimopoulos, will give a descriptive summary of how this perturbation is created and then discuss what kind of fundamental fields can be involved in its formation and whether they correspond to particles that are observable in colliders, such as the Large Hadron Collider in CERN.

A new scenario involving vector boson fields, with its distinct observational signatures in the Cosmic Microwave Background radiation, will be briefly outlined.