Search for quark-lepton compositeness at fermilab tevatron and CERN LHC

Abstract

We make a Monte Carlo study on compositeness of first generation quarks and leptons using the Drell-Yan distribution in the high dielectron mass region at the Fermilab Tevatron and CERN LHC energies. The current experimental lower limits on the compositeness scale Λ vary from 2.5 to 6.1 TeV. In the present analysis, we assume that there will be no deviation of the dielectron mass spectrum from the standard model prediction at center-of-mass energies 2 TeV (Tevatron) and 14 TeV (LHC). We then use the contact interaction Lagrangian and find that in the LL, RR, RL, and LR chirality channels of the quark-electron currents, it is possible to extend the lower limits on Λ (at 95% C.L.) to a range of 6-10 TeV for 2 fb^-1 and 9-19 TeV for 30 fb^-1 of integrated luminosity at Tevatron. At LHC, the corresponding limits extend to a range of 16-25 TeV for 10 fb^-1 and 20-36 TeV for 100 fb^-1 of integrated luminosity.