The nucleon spin decomposition: news and experimental implications
  Recently, many nucleon spin decompositions have been proposed in the literature, creating a lot of confusion. This revived in particular old controversies regarding the measurability of theoretically defined quantities. We propose a brief overview of the different decompositions, discuss the sufficient requirements for measurability and stress the experimental implications. 
C\'edric Lorc\'e (Orsay, IPN and Li\`ege, IFPA)
hep-ph nucl-th