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Weak corrections to gluon-induced top-antitop hadro-production

Weak corrections to gluon-induced top-antitop hadro-production
Weak corrections to gluon-induced top-antitop hadro-production
We calculate purely weak virtual one-loop corrections to the production cross section of top–antitop pairs at the Large Hadron Collider via the gluon–gluon fusion subprocess. We find very small negative corrections to the total cross section, of order ?0.6%, but significantly larger effects to the differential one, particularly in the transverse momentum distribution, of order ?5% to ?10% (in observable regions). In case of parity-conserving spin-asymmetries of the final state, corrections are typically of a few negative percent, with the exception of positive and negative peaks at +12% and ?5%, respectively (near where the tree-level predictions change sign), while those arising in parity-violating asymmetries (which are identically zero in QCD) are typically at a level of a few permille.
0370-2693
513-519
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Nolten, M.R.
4f2ad5b9-777d-4337-ab8c-0de1605b4ea2
Ross, D.A.
eb79bbfe-fb97-4bb3-813c-98f278e5a55f
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Nolten, M.R.
4f2ad5b9-777d-4337-ab8c-0de1605b4ea2
Ross, D.A.
eb79bbfe-fb97-4bb3-813c-98f278e5a55f

Moretti, S., Nolten, M.R. and Ross, D.A. (2006) Weak corrections to gluon-induced top-antitop hadro-production. Physics Letters B, 639 (5), 513-519. (doi:10.1016/j.physletb.2006.06.078).

Record type: Article

Abstract

We calculate purely weak virtual one-loop corrections to the production cross section of top–antitop pairs at the Large Hadron Collider via the gluon–gluon fusion subprocess. We find very small negative corrections to the total cross section, of order ?0.6%, but significantly larger effects to the differential one, particularly in the transverse momentum distribution, of order ?5% to ?10% (in observable regions). In case of parity-conserving spin-asymmetries of the final state, corrections are typically of a few negative percent, with the exception of positive and negative peaks at +12% and ?5%, respectively (near where the tree-level predictions change sign), while those arising in parity-violating asymmetries (which are identically zero in QCD) are typically at a level of a few permille.

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Published date: 17 August 2006

Identifiers

Local EPrints ID: 57485
URI: http://eprints.soton.ac.uk/id/eprint/57485
ISSN: 0370-2693
PURE UUID: 7beffff5-9adc-4e00-ac16-32739dca864a

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

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Contributors

Author: S. Moretti
Author: M.R. Nolten
Author: D.A. Ross

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