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arXiv · hep-ph/9912287

Looking For TeV-Scale Strings and Extra-Dimensions

E. Accomando·I. Antoniadis·K. Benakli
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Abstract

In contrast to the old heterotic string case, the (weakly coupled) type I brane framework allows to have all, part or none of the standard model gauge group factors propagating in large extra--dimensions of TeV$^{-1}$ size. We investigate the main experimental signatures of these possibilities, related to the production of Kaluza-Klein excitations of gluons and electroweak gauge bosons. A discovery through direct observation of resonances is possible only for compactification scales below 6 TeV. However effects due to exchange of virtual Kaluza-Klein excitations could be observed for higher scales. We find that LHC can probe compactification scales as high as 20 TeV for excitations of gluons and 8-15 TeV for excitations of electroweak gauge bosons. Finally, in the case where no gauge boson feels the extra-dimension, we find that effective contact interactions due to massive string mode oscillations dominate those due to the exchange of Kaluza-Klein excitations of gravitons and could be used to obtain bounds on the string scale.

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E. Accomando, I. Antoniadis, K. Benakli. 1999-12-09. Looking For TeV-Scale Strings and Extra-Dimensions. https://doi.org/10.1016/s0550-3213(00)00123-1

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