摘要
We perform a global analysis of the tree-level open-string amplitudes in the limit s MS2 . Based on the present data from the Tevatron, HERA, and LEP 2, we set a lower limit on the string scale MS ≥0.69-1. 96TeV at 95% confidence level for the Chan-Paton factors |T|=0-4. We also estimate the expected sensitivities at the CERN LHC, which can be as high as 19 TeV for |T|=4. © 2005 The American Physical Society.