A new study in Heart says a combination of depression and heart disease is far more lethal than either one of those condition alone.

Depressed people are more likely to die from all causes so it's difficult to narrow down whether or not depressed people with heart disease are at greater risk and people who who are depressed, but otherwise healthy, have been shown to be more likely to develop coronary heart disease, irrespective of what other risk factors they might have. 

A very important new theoretical study has appeared last Tuesday in the hep-ph preprint arxiv. Titled "Precise Predictions on W+4 Jet Production at the Large Hadron Collider", it is signed by a strong team of theorists: C. Berger, Z. Bern, L. Dixon, F. Febres Cordero, D. Forde, T. Gleisberg, H. Ita, D. Kosower, and D. Maitre.

I believe it may be quite useful if I review here the paper results, and explain to you why they are very important for the physics of the LHC. But first, I feel that there are a few details concerning the process of W+jets production at the LHC which might be obscure to most of you. Let me straighten them out -it is worthwhile to do it!

Preliminaries

I occasionally get questions about usage of Science 2.0 that go beyond the FAQ so I decided I would write up a short article on using the site for non-beginners.   The FAQ covers the basics - what Science 2.0® is, the experimental nature of this open writing site for science, etc. along with the basic functionality, like the dashboard - but due to the way the site has grown some other features may not be evident for newer members.

How to find good stuff to write about?