[Cuga] REMINDER!!!Pizza Seminar - Wednesday, November 11, 2009---a message from Hari Areti

[Rachel Harris]

"Implications of Graviton-Graviton Interaction
to Dark Matter"

Speaker: Alexander Deur

12 Noon, November 11, 2009
Cebaf Center L104

Please RSVP to harris at jlab.org by
5PM on Tuesday, November 10, 2009.

Abstract:
Our present understanding of the universe requires the existence of
dark matter and dark energy. In this talk, we will first present the
observation leading to the dark matter hypothesis. Then we will
discuss a natural mechanism that could make exotic dark matter and
possibly dark energy unnecessary. Graviton-graviton interactions
increase the gravitational binding of matter. This increase, for large
massive systems such as galaxies, may be large enough to make exotic
dark matter superfluous. Within a weak field approximation we compute
the effect on the rotation curves of galaxies and find the correct
magnitude and distribution without the need for arbitrary parameters
or additional exotic particles.