Similarity between Kaluza-Klein and Open-string amplitudes in Diphoton Production

Details Similarity between Kaluza-Klein and Open-string amplitudes in Diphoton Production Similarity between Kaluza-Klein and Open-string amplitudes in Diphoton Production

2004-07-22

arxiv.org/abs/hep-ph/0407271v2

JHEP0407:053,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, modified references

Scientific paper

10.1088/1126-6708/2004/07/053

We calculate the tree-level open-string amplitudes for the scattering of four massless particles with diphoton final states. These amplitudes are required to reproduce those of standard model at the tree level in the low energy limit. After low energy stringy corrections, we found that they have similar form to the same processes induced by exchange of the Kaluza-Klein(KK) excitations of graviton in ADD scenario. Using this similarity, we apply constraints on the KK mass scale $M_D$ to the string scale $M_S$. The results are consistent with constraints from the 4-fermion scattering, about $0.6-0.9$ TeV.

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