UConn Physics Colloquium

Inducing Newton's Constant

Professor Aharon Davidson
Department of Physics
Ben-Gurion University of the Negev
Beersheva, Israel

In its original formulation, weak interaction theory was governed by a dimensionful coupling constant, the Fermi constant. General Relativity (GR) is also governed by a dimensionful coupling constant, the Newton constant. It is intriguing to speculate that, in analogy with the modern Weinberg-Salam theory of electroweak interactions, Newton's constant is also spontaneously induced. Thus, we represent the (reciprocal) Newton constant by a scalar field, and let it damped oscillate towards a constant vacuum expectation value. On average the associated cosmological evolution then resembles the dark radiation -> matter -> vacuum energy domination sequence. Its fingerprints are fine ripples, hopefully testable, in the behavior of the cosmological evolution scale factor. The exterior Schwarzschild black hole solution is recovered. However, due to level crossing at the would have been horizon, it now connects with a novel dark core characterized by a locally varying Newton constant. The theory further allows for massless Einstein-style gravitational corpuscles (elementary particles?) which become point-like at the GR limit.

Friday, September 1, 2006
4:00 pm
Gant Science Complex
Physics Department
Room P38

(We will meet for refreshments prior to the talk at 3:30 p.m., in the Gant Science Complex, Physics Library, Room P-103.)


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