Next-to-leading order QCD predictions for top-quark pair production with up to three jets

被引：21

作者：

Hoeche, S. ^{[1
]}

Maierhoefer, P. ^{[2
]}

Moretti, N. ^{[3
]}

Pozzorini, S. ^{[3
]}

Siegert, F. ^{[4
]}

机构：

[1] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA

[2] Albert Ludwigs Univ Freiburg, Inst Phys, D-79104 Freiburg, Germany

[3] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland

[4] Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany

来源：

EUROPEAN PHYSICAL JOURNAL C | 2017年 / 77卷 / 03期

基金：

瑞士国家科学基金会; 美国国家科学基金会;

关键词：

CROSS-SECTIONS; LOOP; REDUCTION; ALGORITHM;

D O I：

10.1140/epjc/s10052-017-4715-y

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We present theoretical predictions for the production of top-quark pairs with up to three jets at the next-to leading order in perturbative QCD. The relevant calculations are performed with Sherpa and OpenLoops. To address the issue of scale choices and related uncertainties in the presence of multiple scales, we compare results obtained with the standard scale H-T/2 at fixed order and the MiNLO procedure. Analyzing various cross sections and distributions for t (t) over bar + 0, 1, 2, 3 jets at the 13TeV LHC we find a remarkable overall agreement between fixed-order and MiNLO results. The differences are typically below the respective factor-two scale variations, suggesting that for all considered jet multiplicities missing higher-order effects should not exceed the ten percent level.

引用

页数：11

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