January 25, 2006

Light Particle in the Landscape

The holiday season is well over and papers have appeared this month in the arXiv but I have not read any well. I noticed that Lubos Motl had carefully chosen the submission moment to get the number 001 for his paper with Arkani-Hamed, Nicolis and Vafa. Sure enough, it is now the beginning of the second century of quantum physics ;-) . Some comments of the paper were written by Jacques Distler in his blog on January 20. I try to get some idea of this (next month, I guess ... after getting rid of some aches). Very briefly, the authors conjecture an upper bound on the coupling of gravity with respect to gauge forces. This implies new physics beneath the Planck scale near GUT scale with a light charged particle.

Not unexpectedly, the string discussion between Lubos and Peter Woit is flourishing after Peter was interviewed by Susan Kruglinski of Discover Magazine. There are twenty two responses at the moment on Peter's blog. Enjoy!