QCD corrections to ZZ production in gluon fusion at the LHC

By F. Caola, K. Melnikov, R. Rontsch, L. Tancredi. 2015

279 citations recorded by the source corpus.

We compute the next-to-leading order QCD corrections to the production of two Z-bosons in the annihilation of two gluons at the LHC. Being enhanced by a large gluon flux, these corrections provide distinct and, potentially, the dominant part of the N 3 LO QCD contributions to Z-pair production in proton collisions. The gg! ZZ annihilation is a loop-induced process that receives the dominant contribution from loops of five light quarks, that are included in our computation in the massless approximation. We find that QCD corrections increase the gg! ZZ production cross section byO(50% 100%) depending on the values of the renormalization and factorization scales used in the leading order computation, and the collider energy. The large corrections to gg! ZZ channel increase the pp! ZZ cross section by about six to eight percent, exceeding the estimated theoretical uncertainty of the recent NNLO QCD calculation.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/e9cc08cbbea8eea2d81bc4514dbd2e1b32a05b17

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In Nuclear and High Energy Physics

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Higgs Physics at the HL-LHC and HE-LHC (2019, background): “NLO corrections are known below the top threshold, and only in an approximate form above [496, 497, 498, 499, 500, 501, 502].”
Les Houches 2017: Physics at TeV Colliders Standard Model Working Group Report (2017, background): “Leading N(3)LOQCD corrections, namely the NLOQCDcorrections to the loop-induced gg channels, became available for the neutral final states ZZ [307] and WW [308] involving full off-shell leptonic dacays, based on the two-loop amplitudes of Refs.”