2006/02/28 by R. Ghavri, C. D. McMullen, Soumitra Nandi +1 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.74.015012
published as Phys.Rev. D74 (2006) 015012 · Replaced figures, updated references, corrected minor typos
arxiv created 2006/07/04 · openalex publication_date 2006/07/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider multiple TeV^\ensuremath-1-size extra compact dimensions in an asymmetric string compactification scenario in which the standard model (SM) gauge bosons can propagate into the TeV^\ensuremath-1-size extra dimensions while the SM fermions are confined to the usual SM D3-brane. We calculate the contributions that the Kaluza-Klein (KK) excitations of the gluons, g*'s, make to the multijet cross sections in proton-proton collisions at the LHC energy. At very high pT, the dijet signal will either be enhanced significantly due to virtual g* exchanges or place a lower bound on the compactification scale of about 8 TeV. We find that the dijet signal is very sensitive to three parameters---the compactification scale, the string scale, and the number of extra dimensions. Thus, although the dijet signal is much more sensitive to KK effects, the dijet signal alone does not provide sufficient information to deduce the number of extra dimensions nor the compactification scale. However, the three-jet signal, which is not sensitive to the string scale, can be analyzed in conjunction with the dijet signal to extract all three parameters. For proton-proton collisions at the LHC energy, the three-jet signal can be significantly enhanced by KK contributions for a compactification scale of about 4--5 TeV.