Spin Dependence of Massive Lepton Pair Production in Proton-Proton Collisions

Abstract

We calculate the transverse momentum distribution for the production of massive lepton-pairs in longitudinally polarized proton-proton reactions at collider energies within the context of perturbative quantum chromodynamics. For values of the transverse momentum Q_T greater than roughly half the pair mass Q, Q_T > Q/2, we show that the differential cross section is dominated by subprocesses initiated by incident gluons, provided that the polarized gluon density is not too small. Massive lepton-pair differential cross sections should be a good source of independent constraints on the polarized gluon density, free from the experimental and theoretical complications of photon isolation that beset studies of prompt photon production. We provide predictions for the spin-averaged and spin-dependent differential cross sections as a function of Q_T at energies relevant for the Relativistic Heavy Ion Collider (RHIC) at Brookhaven, and we compare these with predictions for real prompt photon production.

34 pages, RevTeX including 17 figures in .ps files

References in corpus (5)

• Vector boson production in hadronic collisions
• Massive Lepton Pairs as a Prompt Photon Surrogate
• Spin Dependent Drell Yan in QCD to $O({\alpha }_s^2)$ (I). (The Non-Singlet Sector)
• Drell-Yan Non-Singlet Spin Cross Sections and Spin Asymmetry to $O({\alpha }_s^2)$ (II)
• Spin Dependence of Associated Production of a Prompt Photon and a Charm Quark at Next-to-Leading Order in QCD

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