Non-resonant New Physics in Top Pair Production at Hadron Colliders

Degrande, C.; Gérard, J.M.; Grojean, C.; Maltoni, F.; Servant, G.

doi:10.1007/jhep03(2011)125

Non-resonant New Physics in Top Pair Production at Hadron Colliders

Degrande, C.; Gérard, J.M.; Grojean, C.; Maltoni, F.; Servant, G.

Authors

C. Degrande

J.M. Gérard

C. Grojean

F. Maltoni

G. Servant

Abstract

We use top quark pair production as a probe of top-philic non-resonant new physics. Following a low energy effective field theory approach, we calculate several key observables in top quark pair production at hadron colliders (e.g., total cross section, tt¯tt¯ invariant mass distribution, forward-backward asymmetry, spin correlations) including the interference of the Standard Model with dimension-six operators. We determine the LHC reach in probing new physics after having taken into account the Tevatron constraints. In particular, we show that the gluon fusion process gg→tt¯gg→tt¯ which remains largely unconstrained at the Tevatron is affected by only one top-philic dimension-six operator, the chromo-magnetic moment of the top quark. This operator can be further constrained by the LHC data as soon as a precision of about 20% is reached for the total tt¯tt¯ cross-section. While our approach is general and model-independent, it is particularly relevant to models of Higgs and top compositeness, which we consider in detail, also in connection with tt¯tt¯tt¯tt¯ and tt¯bb¯tt¯bb¯ production.

Citation

Degrande, C., Gérard, J., Grojean, C., Maltoni, F., & Servant, G. (2011). Non-resonant New Physics in Top Pair Production at Hadron Colliders. Journal of High Energy Physics, 2011(3), Article 125. https://doi.org/10.1007/jhep03%282011%29125

Journal Article Type	Article
Acceptance Date	Mar 19, 2011
Online Publication Date	Mar 25, 2011
Publication Date	Mar 25, 2011
Deposit Date	Sep 9, 2013
Publicly Available Date	Apr 21, 2016
Journal	Journal of High Energy Physics
Print ISSN	1126-6708
Publisher	Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Peer Reviewed	Peer Reviewed
Volume	2011
Issue	3
Article Number	125
DOI	https://doi.org/10.1007/jhep03%282011%29125

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© The Author(s) 2011 Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.