Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2007-10-27
Phys.Lett.B665:310-313,2008
Physics
High Energy Physics
High Energy Physics - Theory
4 pages, LaTeX + revtex4; v2: normalization factors corrected; v3: two paragraphs added, minor corrections and enhancements, r
Scientific paper
10.1016/j.physletb.2008.06.011
We provide a new method to construct the S-matrix in quantum field theory. This method implements crossing symmetry manifestly by erasing the a priori distinction between in- and out-states. It allows the description of processes where the interaction weakens with distance in space, but remains strong in the center at all times. It should also be applicable to certain spacetimes where the conventional method fails due to lack of temporal asymptotic states.
Colosi Daniele
Oeckl Robert
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