Looking For TeV-Scale Strings and Extra-Dimensions
摘要
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 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.
引用
@article{arxiv.hep-ph/9912287,
title = {Looking For TeV-Scale Strings and Extra-Dimensions},
author = {E. Accomando and I. Antoniadis and K. Benakli},
journal= {arXiv preprint arXiv:hep-ph/9912287},
year = {2011}
}
备注
13 pages, latex, 6 eps figures