QCD corrections to Z Z production in gluon fusion at the LHC

Caola, Fabrizio; Melnikov, Kirill; Röntsch, Raoul; Tancredi, Lorenzo

doi:10.1103/PhysRevD.92.094028

Title: QCD corrections to $Z Z$ production in gluon fusion at the LHC

Journal Article · Mon Nov 23 00:00:00 EST 2015 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.92.094028· OSTI ID:1226865

Caola, Fabrizio; Melnikov, Kirill; Röntsch, Raoul; Tancredi, Lorenzo

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 a distinct and, potentially, the dominant part of the N³LO 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 by O(50%–100%) depending on the values of the renormalization and factorization scales used in the leading-order computation and the collider energy. Furthermore, the large corrections to the gg → ZZ channel increase the pp → ZZ cross section by about 6% to 8%, exceeding the estimated theoretical uncertainty of the recent next-to-next-to-leading-order QCD calculation.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: De-AC02-07CH11359; AC02-07CH11359

OSTI ID:: 1226865

Alternate ID(s):: OSTI ID: 1247535

Report Number(s):: TTP15-035; CERN-PH-TH-2015-226; FERMILAB-PUB-15-398-T; arXiv:1509.06734; PRVDAQ; 094028

Journal Information:: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology Vol. 92 Journal Issue: 9; ISSN 1550-7998

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 96 works

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