My readers know that I keep myself up to date with the daily submissions at arxiv. Of course, I limit myself to the ones very near my research area. Today there have been some quite interesting papers by people working at the question of Green functions in the low-energy limit of QCD. I would like to point out three contributions at the Madrid conference of the last summer: Arlene Aguilar shows how low-energy phenomenology is consistent with our current understanding of the gluon propagator for the decoupling solution (see here). Joannis Papavassiliou shows how the solution for d=2+1 for the gluon propagator, solving numerically Dyson-Schwinger equations, is in agreement with lattice data (see here). Finally, there is the contribution of Eduardo Fraga, Ana Mizher and Maxim Chernodub about the use of a linear sigma model to understand the vacuum of QCD in a strong magnetic field (see here). These people were also present at Gent.
An original research paper appeared from Orlando Oliveira, Pedro Costa and Paulo Silva (see here). Orlando shocked me again with another bright idea. He and his colleagues managed to get an understanding of the behavior of low-energy physics from choosing the propagator through the scaling or the decoupling solution. The smart idea is to do so by deriving a Nambu-Jona-Lasinio model and solving this for known low-energy observables. As you may know, I worked out something like this in this paper that went published in the International Journal of Modern Physics E. I have sent an email to Orlando asking for a contribution by him or his colleagues in this blog. I hope they will take some time to do this as this paper is really striking and the idea really meaningful. Orlando said to me that this paper will appear soon on Physics Letters B.
Finally, I hope you will enjoy reading these papers as I did.