Constraints on the polarized gluon density in the proton from charm photoproduction

Abstract

We consider the possibility of a direct determination of the polarized gluon density in the proton using charm production with polarized beams at HERA. We study total cross sections and distributions at leading order using different parametrizations of the polarized gluon density. We conclude that charm photoproduction data can be used to constrain the polarized gluon density in the proton if an integrated luminosity of 100~pb${}^{-1}$ will be achieved at HERA.

13 pages Latex, uses epsfig.sty, 3 eps figures appended as uuencoded, gzipped, tarred file

References in corpus (7)

• Measurement of the Spin-Dependent Structure Function $g_1(x)$ of the Proton
• Improving the Weizsäcker-Williams Approximation in Electron-Proton Collisions
• Total Cross Sections for Heavy Flavour Production at HERA
• Heavy Quark Correlations in Photon-Hadron Collisions
• Differential Distributions for Heavy Flavour Production at HERA
• Scale Dependence and Small-x Behaviour of Polarized Parton Distributions
• On the Determination of the Gluon Density of the Proton from Heavy-Flavour Production at HERA

Cited by in corpus (8)

• A first unbiased global determination of polarized PDFs and their uncertainties
• Spin Physics and Polarized Structure Functions
• Theory of hard photoproduction
• $O({\alpha }_s^2)$ corrections to polarized heavy flavour production at $Q^2\gg m^2$
• Photoproduction of Heavy Quarks in Next-to-Leading Order QCD with Longitudinally Polarized Initial States
• Isolated-photon production in polarized pp collisions
• Spin Physics
• Photoproduction of heavy quarks at HERA