String Interactions in PP-Waves

Details String Interactions in PP-Waves String Interactions in PP-Waves

2002-05-16

arxiv.org/abs/hep-th/0205174v1

Phys.Rev.Lett. 89 (2002) 171601

Physics

High Energy Physics

High Energy Physics - Theory

8 pages

Scientific paper

10.1103/PhysRevLett.89.171601

We argue that string interactions in a PP-wave spacetime are governed by an effective coupling $g_{eff}=g_s(\mu p^+\apm)f(\mu p^+ \apm)$ where $f(\mu p^+ \apm)$ is proportional to the light cone energy of the string states involved in the interaction. This simply follows from generalities of a Matrix String description of this background. $g_{eff}$ nicely interpolates between the expected result ($g_s$) for flat space (small $\mu p^+\apm$) and a recently conjectured expression from the perturbative gauge theory side (large $\mu p^+\apm$).

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