Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2005-03-23
J.Phys. A39 (2006) 6057-6068
Physics
High Energy Physics
High Energy Physics - Theory
10 pages, 2 figures
Scientific paper
10.1088/0305-4470/39/20/029
We investigate the generally assumed inconsistency in light cone quantum field theory that the restriction of a massive, real, scalar, free field to the nullplane $\Sigma=\{x^0+x^3=0\}$ is independent of mass \cite{LKS}, but the restriction of the two-point function depends on it (see, e.g., \cite{NakYam77, Yam97}). We resolve this inconsistency by showing that the two-point function has no canonical restriction to $\Sigma$ in the sense of distribution theory. Only the so-called tame restriction of the two-point function exists which we have introduced in \cite{Ull04sub}. Furthermore, we show that this tame restriction is indeed independent of mass. Hence the inconsistency appears only by the erroneous assumption that the two-point function would have a (canonical) restriction to $\Sigma$.
Ullrich Paul
Werner Elisabeth
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