Conformal transformations of the S-matrix; -function identifies change of spacetime
arXiv:1004.3180 · doi:10.1103/PhysRevD.82.025001
Abstract
First conformal transformations of the -matrix are derived in massless -theory. Then it is shown that the anomalous transformations can be rewritten as a symmetry once one has introduced a local coupling and interprets the charge of the symmetry accordingly. By introducing a suitable effective coupling on which the -matrix depends one is able to identify via the -function an underlying new spacetime with non-trivial conformal (flat) metric.
16 pages, 1 figure; v2: reference added, minor clarifications, journal reference added