Journal
NUCLEAR PHYSICS B
Volume 836, Issue 1-2, Pages 37-90Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nuclphysb.2010.04.009
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Funding
- Swiss National Science Foundation (SNF) [200020-116756, 200020-124773, 200020-126691]
- European Community's Marie-Curie Research Training Network HEPTOOLS [MRTN-CT-2006-035505]
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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.
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