Organized by: Prof. Lu Lu

Events on Friday, December 3rd, 2010

Joint with Pheno

String moduli phenomenology, cosmological history, and dark matter

Time: 2:30 pm

Place: 5280 Chamberlin Hall

Speaker: Gordy Kane, U. Michigan

Abstract: In this talk I argue that compactified string theories with broken supersymmetry and with stabilized moduli generically have one or more moduli with masses of order the gravitino mass or less. Then cosmological constraints imply the gravitino and moduli masses are of order 30 TeV or heavier, which implies the universe has a non-thermal cosmological history. This in turn suggests that the LSP is wino-like, predicting in particular a signal for galactic positrons and antiprotons consistent with that seen by the PAMELA satellite, and interesting LHC signals. Although the above results hold very generally in string theories, we were led to them from our earlier compactification of M-theory on a G2 manifold, so I will begin the talk with a review of the G2 results.

Host: Michael Ramsey-Musolf

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