Extended Version of Rev. Mod. Phys. Article


The extended version with hyperlinks is available here.

This version includes all material that was cut from the published version in order to meet the page limit.  It is color-coded in the following way to show the differences:

dark red:       Topics not discussed in the published version.

dark green:    Extended discussion of certain topics.

dark blue:      Material that was added later.

The arXiv version will be kept in its current state (24-7-2013) apart from correcting typos.

The extended version may be updated from time to time, with new text added in dark blue.

A black and white version without hyperlinks is available here.