ZZ production at hadron colliders in NNLO QCD

F Cascioli,T Gehrmann,M Grazzini,S Kallweit,P Maierhöfer,A Von Manteuffel,S Pozzorini,D Rathlev,L Tancredi,E Weihs

doi:10.1016/j.physletb.2014.06.056

F Cascioli, T Gehrmann + Show 8 more

Open Access

https://doi.org/10.1016/j.physletb.2014.06.056

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Abstract

We report on the first calculation of next-to-next-to-leading order (NNLO) QCD corrections to the inclusive production of Z-boson pairs at hadron colliders. Numerical results are presented for pp collisions with centre-of-mass energy (s) ranging from 7 to 14 TeV. The NNLO corrections increase the NLO result by an amount varying from 11% to 17% as s goes from 7 to 14 TeV. The loop-induced gluon fusion contribution provides about 60% of the total NNLO effect. When going from NLO to NNLO the scale uncertainties do not decrease and remain at the ±3% level.

Highlights

D corrections results are to the inclusive production of Z-boson pairs at presented for pp collisions with centre-of-mass hadron energy (c√olsli)drearns.giNnugmfreormica7l to 14 TeV
Since the gluon-induced contribution is enhanced by the gluon luminosity, it is often assumed to provide the bulk of the next-to-next-to-leading order (NNLO) corrections
In this Letter we report on the first calculation of the inclusive production of on-shell Z-boson pairs at hadron colliders in NNLO QCD

Summary

Introduction

D corrections results are to the inclusive production of Z-boson pairs at presented for pp collisions with centre-of-mass hadron energy (c√olsli)drearns.giNnugmfreormica7l to 14 TeV. The computation of the relevant one-loop helicity amplitudes [10] allowed complete NLO calculations [11, 12] including spin correlations and off-shell effects. The loopinduced gluon fusion contribution, which is formally next-to-next-to-leading order (NNLO), has been computed in Refs.

Results

Conclusion