Model-independent precision constraints on dimension-6 operators
By A. Falkowski, F. Riva. 2014
207 citations recorded by the source corpus.
A bstractWe discuss electroweak precision constraints on dimension-6 operators in the effective theory beyond the standard model. We identify the combinations of these operators that are constrained by the pole observables (the W and Z masses and on-shell decays) and by the W boson pair production. To this end, we define a set of effective couplings of W and Z bosons to fermions and to itself, which capture the effects of new physics corrections. This formalism clarifies which operators are constrained by which observable, independently of the adopted basis of operators. We obtain numerical constraints on the coefficients of dimension-6 operator in a form that can be easily adapted to any particular basis of operators, or any particular model with new heavy particles.
Subfields: Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/376aabdeabef7fe578e7f64dd02deaa771ba1171
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In Atomic and Molecular Physics, and Optics
In Nuclear and High Energy Physics
Citations in the corpus
- Electroweak constraints on flavorful effective theories (2015, methodology): “For example, including the LEP-2 WW production data breaks the degeneracy and allows one to separately constrain cHf , cWB, and cT [7, 16].”
- Illuminating dark photons with high-energy colliders (2014, methodology): “wever, we will not use sin2 ‘ e (Q FB) to obtain bounds on the dark photon model, since this measurement is difficult to interpret in theories with vertex corrections to the Zboson coupling (see also [110]). A convenient set of independent input observables is m h;m Z;m t; s; (5) had ; (3.2) the latt”
- 2, 84, 30, 993, 560, 15456, 11962, 261485, . . .: higher dimension operators in the SM EFT (2015, methodology): “Our investigations are motivated by the difficulties in determining the operator content of the SM EFT, as well as interesting features so far uncovered in the well developed literature [3–7, 10, 12–36].”
- A Monte Carlo global analysis of the Standard Model Effective Field Theory: the top quark sector (2019, background): “Among these 10 operators, 8 degrees of freedom are stringently constrained by electroweak observables [61], while two flat directions remain which are constrained only by diboson production processes, as discussed in Refs.”
- How to use the Standard Model effective field theory (2014, background): “J H E P 0 1 ( 2 0 1 6 ) 0 2 3 have been a variety of studies concerning the mapping of operators onto weak-scale observables in the literature [18, 28, 30, 31, 36–53], to the best of our knowledge, a complete and systematic list does not exist yet.”
- Combined SMEFT interpretation of Higgs, diboson, and top quark data from the LHC (2021, background): “Fourteen linear combinations of the coefficients associated to these 16 operators are constrained by the LEP EWPOs [43], leaving therefore only two linear combinations unconstrained.”