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Weak corrections to three-jet production in electron positron annihilations, 1. The factorisable contributions

Weak corrections to three-jet production in electron positron annihilations, 1. The factorisable contributions
Weak corrections to three-jet production in electron positron annihilations, 1. The factorisable contributions
We report on the calculation of the factorisable one-loop weak-interaction corrections to the initial and final states for three-jet observables in electron-positron annihilations. We show that such corrections are of a few percent at s1/2 = MZ. Hence, while their impact is not dramatic in the context of LEP1 and SLC, where the total error on the measured value of ?S is larger, at a future Linear Collider, running at the Z mass peak (e.g., GigaZ), they ought to be taken into account in the experimental fits, as here the uncertainty on the value of the strong coupling constant is expected to be at the 0.1% level or even smaller. The calculation has been performed using helicity amplitudes so that it can be applied to the case of polarised beams.
standard model, qcd, nlo computations, jets
1-21
Maina, Ezio
edb271d2-833f-4b90-8be0-9c21a13e93c0
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Ross, Douglas A.
eb79bbfe-fb97-4bb3-813c-98f278e5a55f
Maina, Ezio
edb271d2-833f-4b90-8be0-9c21a13e93c0
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Ross, Douglas A.
eb79bbfe-fb97-4bb3-813c-98f278e5a55f

Maina, Ezio, Moretti, Stefano and Ross, Douglas A. (2003) Weak corrections to three-jet production in electron positron annihilations, 1. The factorisable contributions. Journal of High Energy Physics, 4 (56), 1-21. (doi:10.1088/1126-6708/2003/04/056).

Record type: Article

Abstract

We report on the calculation of the factorisable one-loop weak-interaction corrections to the initial and final states for three-jet observables in electron-positron annihilations. We show that such corrections are of a few percent at s1/2 = MZ. Hence, while their impact is not dramatic in the context of LEP1 and SLC, where the total error on the measured value of ?S is larger, at a future Linear Collider, running at the Z mass peak (e.g., GigaZ), they ought to be taken into account in the experimental fits, as here the uncertainty on the value of the strong coupling constant is expected to be at the 0.1% level or even smaller. The calculation has been performed using helicity amplitudes so that it can be applied to the case of polarised beams.

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More information

Published date: 2003
Keywords: standard model, qcd, nlo computations, jets

Identifiers

Local EPrints ID: 57435
URI: http://eprints.soton.ac.uk/id/eprint/57435
PURE UUID: 81b2c5f0-a7ec-41c4-ad85-9c2b6dfd4f06

Catalogue record

Date deposited: 14 Aug 2008
Last modified: 09 Nov 2021 09:53

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Contributors

Author: Ezio Maina
Author: Stefano Moretti
Author: Douglas A. Ross

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