QCD corrections to ZZ production in gluon fusion at the LHC

被引：115

作者：

Caola, Fabrizio ^{[1
]}

Melnikov, Kirill ^{[2
]}

Roentsch, Raoul ^{[3
]}

Tancredi, Lorenzo ^{[2
]}

机构：

[1] CERN, Div Theory, CGH-1211 Geneva 23, Switzerland

[2] KIT, Inst Theoret Particle Phys, D-76128 Karlsruhe, Germany

[3] Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA

来源：

PHYSICAL REVIEW D | 2015年 / 92卷 / 09期

关键词：

HIGGS-BOSON PRODUCTION; ONE-LOOP AMPLITUDES; HADRON COLLIDERS; PAIR PRODUCTION; CROSS-SECTIONS; CONSTRAINTS; COLLISIONS; UNITARITY; GAMMA; MASS;

D O I：

10.1103/PhysRevD.92.094028

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 (NLO)-L-3 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. 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.

引用

页数：9

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