NNLO corrections to massive lepton-pair production in longitudinally polarized proton-proton collisions

Ravindran, V. ; Smith, J. ; van Neerven, W. L. (2004) NNLO corrections to massive lepton-pair production in longitudinally polarized proton-proton collisions Nuclear Physics B, 682 (1-2). pp. 421-456. ISSN 0550-3213

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.nuclphysb.2004.01.001

Abstract

We present the full next-to-next-to-leading order (NNLO) coefficient functions for the polarized cross section dΔσ/dQ for the Drell-Yan process p+p→l+l-+'X'. Here 'X' denotes any inclusive hadronic state and Q represents the invariant mass of the lepton pair. All QCD partonic subprocesses have been included provided the lepton pair is created by a virtual photon, which is a valid approximation for Q<50 GeV. Unlike the differential distribution w.r.t. transverse momentum the dominant subprocess for the integrated cross section is given by q + q- → γ + 'X' and its higher order corrections so that massive lepton pair production provides us with an excellent tool to measure the polarized anti-quark densities. Our calculations are carried out using the method of n-dimensional regularization by making a special choice for the γ5 matrix. We give predictions for double longitudinal spin asymmetry measurements at the RHIC.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:85056
Deposited On:29 Feb 2012 07:13
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