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Improving the Drell–Yan probe of small x partons at the LHC via a k t cut

E. G. de Oliveira, A. D. Martin, M. G. Ryskin
2013 European Physical Journal C: Particles and Fields  

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2012 pre-print arXiv:1212.3135v1 fatcat:mj26i4ijfzbddd4uwbt7jcqjru

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2013 accepted
arXiv:1212.3135v2 fatcat:nhjyvspktjfknlwz5tmo7lcpxa
We show that the observation of the Drell-Yan production of low-mass lepton-pairs (M < 20 GeV) at high rapidities (Y > 3) at the LHC can make a direct measurement of parton distribution functions (PDFs) in the low x region, x < 10^-4. We describe a procedure that greatly reduces the sensitivity of the 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
more » ... nt low scale, low x domain. We include the effects of the Sudakov suppression factor.
doi:10.1140/epjc/s10052-013-2361-6 fatcat:ejegffvfefbtjmlcce2zmzyza4
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E. G. de Oliveira, A. D. Martin, M. G. Ryskin. "Improving the Drell–Yan probe of small x partons at the LHC via a k t cut." European Physical Journal C: Particles and Fields 73.3 (2013)