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We show that the observation of the Drell-Yan production of low-masslepton-pairs (M < 20 GeV) at high rapidities (Y > 3) at the LHC can make adirect measurement of parton distribution functions (PDFs) in the low x region,x < 10^{-4}. We describe a procedure that greatly reduces the sensitivity ofthe predictions to the choice of the factorization scale and, in particular,show how, by imposing a cutoff on the transverse momentum of the lepton-pair,the data are able to probe PDFs in the important low scale, low x domain. Weinclude the effects of the Sudakov suppression factor.

Improving the Drell-Yan probe of small x partons at the LHC via a k_t cut