Non-resonant new physics in top pair production at hadron colliders
By Céline Degrande, J. Gerard, Christophe Grojean, Fabio Maltoni, G. Servant. 2010
162 citations recorded by the source corpus.
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, $ t\bar{t} $ 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 \to t\bar{t} $ 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 $ t\bar{t} $ 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 $ t\bar{t}t\bar{t} $ and $ t\bar{t}b\bar{b} $ production.
Subfields: Artificial Intelligence, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/a560d59589d921f05a6cb9c210907521027850d2
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Artificial Intelligence
- Atlas Collaboration
- Cms Collaboration
- Christophe Grojean
- M. Muhlleitner
- Olivier Mattelaer
- Roberto Contino
- Michael Spira
- Fabio Maltoni
In Nuclear and High Energy Physics
- Atlas Collaboration
- Fabio Maltoni
- Cms Collaboration
- Olivier Mattelaer
- M. Muhlleitner
- Christophe Grojean
- Johan Alwall
- E. Vryonidou
Citations in the corpus
- Search for production of vector-like quark pairs and of four top quarks in the lepton-plus-jets final state in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector (2015, methodology): “scribed via an effective field theory (EFT) involving a four-fermion contact interaction [75] (figure 3(b)).”
- MadGraph 5: going beyond (2011, background): “…theory formulations for physics beyond the Standard Model, and have recently been studied in the context of top-quark LHC phenomenology [70, 71, 72] We are here presenting two examples of four-fermion vertices leading to the process uu → tt [73], one which corresponds to the exchange of a…”
- Probing top quark neutral couplings in the Standard Model Effective Field Theory at NLO in QCD (2016, background): “They are the same set of seven operators that contribute to top pair production as discussed in [24, 25].”
- Effective Lagrangian for a light Higgs-like scalar (2013, methodology): “To this aim, the analysis of differential distributions and spin correlations could be a successful strategy [41, 66–68].”