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

Autor(es)

de Oliveira, E. G. ^{[1, 2]} ; Martin, A. D. ^[2] ; Ryskin, M. G. ^{[2, 3]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil

^[2] Univ Durham, Inst Particle Phys Phenomenol, Durham DH1 3LE - England

^[3] NRC Kurchatov Inst, Petersburg Nucl Phys Inst, St Petersburg 188300 - Russia

• Tipo de documento: Artigo Científico
• Fonte: EUROPEAN PHYSICAL JOURNAL C; v. 73, n. 3 MAR 2013.
• Citações Web of Science: 5

Resumo

We show that the observation of the Drell-Yan production of low-mass lepton-pairs (M less than or similar to 20 GeV) at high rapidities (Y greater than or similar to 3) at the LHC can make a direct measurement of parton distribution functions (PDFs) in the low x region, x less than or similar to 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 important low scale, low x domain. We include the effects of the Sudakov suppression factor. (AU)

• Processo FAPESP: 12/05469-4 - Estudos fenomenológicos oportunos relevantes para o LHC
• Beneficiário: Emmanuel Gräve de Oliveira
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado