Speaker
Description
I discuss the all-order transverse momentum resummation structure for the hadroproduction of heavy-quark pairs. I present some numerical results for the resummed qT spectrum of heavy-quark pairs at next-to-leading logarithmic (NLL) order. I also discuss the azimuthal correlations produced by soft parton radiation, which are entangled with those that are produced by initial-state collinear radiation. The knowledge of the small-qT limit of the transverse-momentum cross section enables us to perform a fully exclusive fixed-order calculation up to NNLO in the framework of qT-subtraction method. I present the results of our first calculation which is accurate up to NLO in QCD perturbation theory and it includes all the flavour off-diagonal partonic channels at NNLO.
Summary
I discuss the all-order transverse momentum resummation structure for the hadroproduction of heavy-quark pairs. I present some numerical results for the resummed qT spectrum of heavy-quark pairs at next-to-leading logarithmic (NLL) order. I also discuss the azimuthal correlations produced by soft parton radiation, which are entangled with those that are produced by initial-state collinear radiation. The knowledge of the small-qT limit of the transverse-momentum cross section enables us to perform a fully exclusive fixed-order calculation up to NNLO in the framework of qT-subtraction method. I present the results of our first calculation which is accurate up to NLO in QCD perturbation theory and it includes all the flavour off-diagonal partonic channels at NNLO.
