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Improving the Weizsäcker-Williams Approximation in Electron-Proton Collisions
S. Frixione, M. L. Mangano, P. Nason +1
We critically examine the validity of the Weizsäcker-Williams approximation in electron-hadron collisions. We show that in its commonly used form it can lead to large errors, and w…
Heavy Quark Correlations in Photon-Hadron Collisions
S. Frixione, M. Mangano, P. Nason +1
We describe a next-to-leading-order calculation of the fully exclusive parton cross section for the photoproduction of heavy quarks. We use our result to compute quantities of inte…
On the Determination of the Gluon Density of the Proton from Heavy-Flavour Production at HERA
Stefano Frixione Michelangelo L. Mangano Paolo Nason, Giovanni Ridolfi
Using a recent next-to-leading-order calculation of the photoproduction double differential cross section for heavy quarks, we study the possibility of extracting the gluon density…