Measuring R-parity-violating couplings in dilepton production at the LHC

We revisit the issue of probing R-violating couplings of supersymmetrictheories at hadronic colliders, particularly at the LHC. Concentrating ondimuon production, an evaluation of the optimal sensitivity to the R-violatingcoupling is performed through a maximum likelihood analysis. The measurementuncertainties are evaluated through a study of fully generated events processedthrough a fast simulation of the ATLAS detector. It is found that a host ofR-violating couplings can be measured to a statistical accuracy of better than10%, over a significant part of the m_{tilde f} -- lambda parameter space stillallowed by low energy measurements. Since the bounds thus obtained do notsimply scale as the squark mass, one can do significantly better at the LHCthan at the Tevatron. The same analysis can also be extended to assess thereach of the LHC to effects due to any non-SM structure of the four-fermionamplitude, caused by exchanges of new particles with different spins such asleptoquarks and gravitons that are suggested by various theoretical ideas.Comment: 28 pages, 14 figures (uses JHEP3.cls