### Maldacena on Inflation

Many people have been hoping recently that observations of the cosmic microwave background might provide a “window” into high energy physics well beyond the energy scales accessible in terrestrial accelerators.

So far, however, a concrete (and detectable!) “signal” to look for has proven elusive.

Juan Maldacena has a really nice paper on the leading non-gaussian contributions to the fluctuations in a slow-roll inflationary model. He computes the 3-point functions of scalar and tensor fluctuations. The effect is order (H/M_{pl})^{4}, and so probably unobservably small.

Still, a nifty computation.