We discuss recent progress - obtained together with K.-H. Neeb - on the
problem of classifying projective unitary representations of gauge
groups that satisfy a positive energy condition. In order to deal with
projective representations, we use the universal central extension of
the gauge Lie algebra that we found in joint work with Chr. Wockel.
Links:
[1] http://www.mpim-bonn.mpg.de/taxonomy/term/39
[2] http://www.mpim-bonn.mpg.de/node/3444
[3] http://www.mpim-bonn.mpg.de/node/158