QCD corrections to production in gluon fusion at the LHC
Abstract
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.
- Authors:
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1226865
- Alternate Identifier(s):
- OSTI ID: 1247535
- Report Number(s):
- TTP15-035; CERN-PH-TH-2015-226; FERMILAB-PUB-15-398-T; arXiv:1509.06734
Journal ID: ISSN 1550-7998; PRVDAQ; 094028
- Grant/Contract Number:
- De-AC02-07CH11359; AC02-07CH11359
- Resource Type:
- Published Article
- Journal Name:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology
- Additional Journal Information:
- Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology Journal Volume: 92 Journal Issue: 9; Journal ID: ISSN 1550-7998
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Caola, Fabrizio, Melnikov, Kirill, Röntsch, Raoul, and Tancredi, Lorenzo. QCD corrections to Z Z production in gluon fusion at the LHC. United States: N. p., 2015.
Web. doi:10.1103/PhysRevD.92.094028.
Caola, Fabrizio, Melnikov, Kirill, Röntsch, Raoul, & Tancredi, Lorenzo. QCD corrections to Z Z production in gluon fusion at the LHC. United States. https://doi.org/10.1103/PhysRevD.92.094028
Caola, Fabrizio, Melnikov, Kirill, Röntsch, Raoul, and Tancredi, Lorenzo. Mon .
"QCD corrections to Z Z production in gluon fusion at the LHC". United States. https://doi.org/10.1103/PhysRevD.92.094028.
@article{osti_1226865,
title = {QCD corrections to Z Z production in gluon fusion at the LHC},
author = {Caola, Fabrizio and Melnikov, Kirill and Röntsch, Raoul and Tancredi, Lorenzo},
abstractNote = {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.},
doi = {10.1103/PhysRevD.92.094028},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 9,
volume = 92,
place = {United States},
year = {Mon Nov 23 00:00:00 EST 2015},
month = {Mon Nov 23 00:00:00 EST 2015}
}
https://doi.org/10.1103/PhysRevD.92.094028
Web of Science
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