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Vector boson production at hadron colliders: transverse-momentum resummation and leptonic decay

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arxiv 1507.06937 v2 pith:TTL73DHB submitted 2015-07-24 hep-ph hep-ex

Stefano Catani , Daniel de Florian , Giancarlo Ferrera , Massimiliano Grazzini This is my paper
classification hep-phhep-ex
keywords decaybosonleptonicresultsresummedvectorcalculationcollisions
verification ladder T0 review T1 audit T2 compute T3 formal
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abstract

We consider the transverse-momentum ($q_T$) distribution of Drell-Yan lepton pairs produced, via $W$ and $Z/\gamma^*$ decay, in hadronic collisions. At small values of $q_T$, we resum the logarithmically-enhanced perturbative QCD contributions up to next-to-next-to-leading logarithmic accuracy. Resummed results are consistently combined with the known ${\mathcal O}(\alpha_S^2)$ fixed-order results at intermediate and large values of $q_T$. Our calculation includes the leptonic decay of the vector boson with the corresponding spin correlations, the finite-width effects and the full dependence on the final-state lepton(s) kinematics. The computation is encoded in the numerical program DYRes, which allows the user to apply arbitrary kinematical cuts on the final-state leptons and to compute the corresponding distributions in the form of bin histograms. We present a comparison of our results with some of the available LHC data. The inclusion of the leptonic decay in the resummed calculation requires a theoretical discussion on the $q_T$ recoil due to the transverse momentum of the produced vector boson. We present a $q_T$ recoil procedure that is directly applicable to $q_T$ resummed calculations for generic production processes of high-mass systems in hadron collisions.

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Cited by 5 Pith papers

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