Electroweak corrections to hadronic event shapes and jet production in e+e- annihilation

被引：25

作者：

Denner, Ansgar ^{[2
]}

Dittmaier, Stefan ^{[3
]}

Gehrmann, Thomas ^{[1
]}

Kurz, Christian ^{[1
,2
]}

机构：

[1] Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland

[2] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[3] Univ Freiburg, Inst Phys, D-79104 Freiburg, Germany

来源：

NUCLEAR PHYSICS B | 2010年 / 836卷 / 1-2期

基金：

瑞士国家科学基金会;

关键词：

TO-LEADING ORDER; CROSS-SECTIONS; RADIATIVE-CORRECTIONS; THRUST DISTRIBUTION; ENERGY-DEPENDENCE; POWER CORRECTIONS; DELPHI DETECTOR; CHARGED-CURRENT; QCD; E+E;

D O I：

10.1016/j.nuclphysb.2010.04.009

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 a complete calculation of the electroweak O(alpha(3)alpha(s)) corrections to three-jet production and related event-shape observables at electron-positron colliders. The Z-boson resonance is described within the complex-mass scheme, rendering the calculation valid both in the resonance and off-shell regions. Higher-order initial-state radiation is included in the leading-logarithmic approximation. We properly account for the corrections to the total hadronic cross section and for the experimental photon isolation criteria. To this end we implement contributions of the quark-to-photon fragmentation function both in the slicing and subtraction formalism. The effects of the electroweak corrections on various event-shape distributions and on the three-jet rate are studied. They are typically at the few-percent level, and remnants of the radiative return are found even after inclusion of appropriate cuts. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：37 / 90

页数：54

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