Global approach to top-quark flavor-changing interactions

By G. Durieux, Fabio Maltoni, Cen Zhang. 2014

166 citations recorded by the source corpus.

We adopt a fully gauge-invariant effective-field-theory approach for parametrizing top-quark flavor-changing-neutral-current interactions. It allows for a global interpretation of experimental constraints (or measurements) and the systematic treatment of higher-order quantum corrections. We discuss some recent results obtained at next-to-leading-order accuracy in QCD and perform, at that order, a first global analysis of a subset of the available experimental limits in terms of effective operator coefficients. We encourage experimental collaborations to adopt this approach and extend the analysis by using all information they have prime access to.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/3ae5be4e79d097bf9044ac3e7f482ebb79377d4f

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Nuclear and High Energy Physics

1. Fabio Maltoni
2. E. Vryonidou
3. Nathan Hartland
4. Juan Rojo
5. Tilman Plehn
6. Cen Zhang
7. Ilaria Brivio
8. E. Nocera

Citations in the corpus

• O new physics, where art thou? A global search in the top sector (2019, methodology): “Since top-quark observables at the LHC are largely blind to the flavor of light quarks with the same quantum numbers, we impose an U(2)q × U(2)u × U(2)d flavor symmetry among quarks of the first and second generation [37–39].”
• Opportunities in Flavour Physics at the HL-LHC and HE-LHC (2018, methodology): “[1157] for the m`` ∈ [78, 102] GeV range although the most stringent constraints by ATLAS are set using |m``−mZ | < 15 GeV.”
• Probing top quark neutral couplings in the Standard Model Effective Field Theory at NLO in QCD (2016, methodology): “By employing global analyses [10–12], experimental results can be used to determine the size of the deviations due to each effective operator.”
• Constraining top quark effective theory in the LHC Run II era (2015, background): “such as precision electroweak data [49], or flavour-changing neutral currents [50,51].”
• A Monte Carlo global analysis of the Standard Model Effective Field Theory: the top quark sector (2019, methodology): “Several SMEFT analyses of the top quark sector have been presented based on either hadron collider [40–45] or lepton collider [46] processes, in the latter case also considering the sensitivity of future machines such as the International Linear Collider (ILC).”