Dalmazi, Denis2014-05-202014-05-202006-08-01Journal of High Energy Physics. Trieste: Int School Advanced Studies, n. 8, 10 p., 2006.1126-6708http://hdl.handle.net/11449/9133The existence of an interpolating master action does not guarantee the same spectrum for the interpolated dual theories. In the specific case of a generalized self-dual (GSD) model defined as the addition of the Maxwell term to the self-dual model in D = 2 + 1, previous master actions have furnished a dual gauge theory which is either nonlocal or contains a ghost mode. Here we show that by reducing the Maxwell term to first order by means of an auxiliary field we are able to define a master action which interpolates between the GSD model and a couple of non-interacting Maxwell-Chern-Simons theories of opposite helicities. The presence of an auxiliary field explains the doubling of fields in the dual gauge theory. A generalized duality transformation is defined and both models can be interpreted as self-dual models. Furthermore, it is shown how to obtain the gauge invariant correlators of the non-interacting MCS theories from the correlators of the self-dual field in the GSD model and vice-versa. The derivation of the non-interacting MCS theories from the GSD model, as presented here, works in the opposite direction of the soldering approach.10engduality in gauge field theoriesChern-Simons theoriesfield theories in lower dimensionsArtigo10.1088/1126-6708/2006/08/040WOS:000240460800040Acesso restrito8279393876415608