Ultraviolet and Infrared freedom from string amplitudes

Details Ultraviolet and Infrared freedom from string amplitudes Ultraviolet and Infrared freedom from string amplitudes

1999-07-28

arxiv.org/abs/hep-th/9907205v2

JHEP 9910 (1999) 018

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX, 20 pages, 4 figures, two references added

Scientific paper

10.1088/1126-6708/1999/10/018

The infinite tension limit of string amplitudes is examined with some care, identifying the part responsible of diamagnetic behaviour as well as a peculiar paramagnetic {\em tachyon magnifying} responsible of asymptotic freedom. The way string theory represents abelian gauge theories is connected with the non-planar reggeon/pomeron amplitude and a nontrivial beta function is found in the low energy limit of a single D-brane.

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