We consider the eective Lagrangian due to the exchange of heavy KK tensor
graviton and scalar radion states in a stabilized RS1 model and compute explicitly
the corresponding eective coupling constants. The Drell-Yan lepton pair production
at the Tevatron and the LHC is analyzed in two situations, when the first KK
resonance is too heavy to be directly detected at the colliders, and when the first
KK resonance is visible but other states are still too heavy. In the first case the
eective Lagrangian reduces to a contact interaction of SM particles, whereas in the
second case it includes a coupling of SM particles to the first KK mode and a contact
interaction due to the exchange of all the heavier modes. It is shown that in both
cases the contribution from the invisible KK tower leads to a modification of final
particles distributions. In particular, for the second case a nontrivial interference
between the first KK mode and the rest KK tower takes place. Expected 95%% CL
limits for model parameters for the Tevatron and the LHC are given. The numerical
results are obtained by means of the CompHEP code, in which all new eective
interactions are implemented providing a tool for simulation of corresponding events
and a more detailed analysis.
Document number: 2009-4/848
Authors: E.E. Boos, V.E. Bunichev, M.N. Smolyakov, I.P. Volobuev
Email: smolyakov@theory.sinp.msu.ru