After a lot of work and a long wait, the second edition of our book has appeared.

We have our own copies and it looks very good. The eBook edition is available everywhere at the moment. The hardcover is available in Europe, and will be so in the US in a few weeks once the slow boat delivers the shipment.

With the help of Grigory Ovanesyan and Basem El-Menoufi, we have made a nice step of progress in understanding Regge behavior in Soft Collinear Effective Theory (SCET). The paper is here. The issue turns out to be a very subtle one for effective field theory, involving the overlap of different field modes, and it may be important for understanding the limits of factorization theorems.

Basem and I have a paper exploring the nonlocal effects that come from loops of light fields in gravity. I think that this is an important new area. Already, it seems to have major effects, such as the avoidance of singularities in general relativity, providing a quantum exception to the classical Hawking-Penrose theorems. There seems to be much to do in this area of nonlocal properties of field theory.

I participated in a workshop on this topic at the Perimeter Institute. I am a bit of an outsider as I have used the effective field theory treatment to criticize naive applications of running gravitational couplings. The connection of a field like that of Asymptotic Safety to real Loretzian effective field theory is something that needs a better understanding, and I now have a collaboration working on some progress in this area.

The talks at the workshop can be found here.

Besides the science, they produced the best conference photo ever.