# Top–antitop production from $$W^+_L W^-_L$$WL+WL- and $$Z_L Z_L$$ZLZL scattering under a strongly interacting symmetry-breaking sector

@article{Castillo2016TopantitopPF, title={Top–antitop production from \$\$W^+\_L W^-\_L\$\$WL+WL- and \$\$Z\_L Z\_L\$\$ZLZL scattering under a strongly interacting symmetry-breaking sector}, author={Andr'es Castillo and Rafael L. Delgado and Antonio Dobado and Felipe J. Llanes-Estrada}, journal={The European Physical Journal C}, year={2016}, volume={77}, pages={1-14} }

By considering a non-linear electroweak chiral Lagrangian, including the Higgs, coupled to heavy quarks, and the equivalence theorem, we compute the one-loop scattering amplitudes $$W^+W^-\rightarrow t\bar{t}$$W+W-→tt¯, $$ZZ\rightarrow t\bar{t}$$ZZ→tt¯ and $$hh\rightarrow t\bar{t}$$hh→tt¯ (in the regime $$M_t^2/v^2\ll \sqrt{s}M_t/v^2\ll s/v^2$$Mt2/v2≪sMt/v2≪s/v2 and to NLO in the effective theory). We calculate the scalar partial-wave helicity amplitudes which allow us to check unitarity at the…

## 10 Citations

### Strongly coupled theories beyond the Standard Model

- PhysicsProgress in Particle and Nuclear Physics
- 2020

### Coupling of tt̄ and γγ with a strongly interacting Electroweak Symmetry Breaking Sector

- Physics
- 2016

We report the coupling of an external γγ or tt state to a strongly interacting EWSBS satisfying unitarity. We exploit perturbation theory for those coupling of the external state, whereas the EWSBS…

### Systematizing and addressing theory uncertainties of unitarization with the Inverse Amplitude Method

- PhysicsSciPost Physics
- 2021

Effective Field Theories (EFTs) constructed
as derivative expansions in powers of momentum, in the spirit of Chiral Perturbation Theory (ChPT), are a controllable approximation to strong dynamics as…

### Importance of fermion loops in W+W− elastic scattering

- PhysicsNuclear and Particle Physics Proceedings
- 2021

### SMEFT as a slice of HEFT’s parameter space

- MathematicsEPJ Web of Conferences
- 2022

The Standard Model Effective Field Theory (SMEFT) is the parametrization chosen to interpret many modern measurements. We have recently discussed, building on the work of other groups, that its…

### Analytical Properties and Unitarization

- Physics
- 2017

This chapter includes a detailed study of the mathematical properties of the S-matrix, encoded in dispersion relations. Several unitarization procedures (IAM, N/D, old K-matrix and improved K-matrix)…

### Chiral EW Lagrangian

- Physics
- 2017

The ATLAS and CMS collaborations at LHC have found a new boson compatible with the SM Higgs, with a mass of nearly \(M_h\simeq 125\,\mathrm{GeV}\). Furthermore, the most probable \(J^P\) quantum…

### Resonant production of Wh and Zh at the LHC

- Physics
- 2017

A bstractWe examine the production of Wh and Zh pairs at the LHC in the context of a Strongly Interacting Symmetry Breaking Sector of the Standard Model. Our description is based on a non-linear…

### Coupling WW, ZZ unitarized amplitudes to $$\gamma \gamma $$γγ in the TeV region

- Physics
- 2016

We define and calculate helicity partial-wave amplitudes for processes linking the Electroweak Symmetry Breaking Sector (EWSBS) to $$\gamma \gamma $$γγ, employing (to NLO) the Higgs-EFT (HEFT)…

## References

SHOWING 1-10 OF 69 REFERENCES

### Search for the Standard Model Higgs boson decaying into bb¯$$ b\overline{b} $$ produced in association with top quarks decaying hadronically in pp collisions at s=8$$ \sqrt{s}=8 $$ TeV with the ATLAS detector

- Physics
- 2016

A bstractA search for Higgs boson production in association with a pair of top quarks (tt¯H$$ t\overline{t}H $$) is performed, where the Higgs boson decays to bb¯$$ b\overline{b} $$, and both top…

### Heavy Higgs bosons in the Weinberg-Salam model

- Mathematics
- 1980

We search for a systematic way to characterize the low-energy sensitivity of the minimal Weinberg-Salam model to a heavy-Higgs-boson sector. We find that it is convenient to view this theory as the…

### Top-pair production at the LHC through NNLO QCD and NLO EW

- Physics
- 2017

A bstractIn this work we present for the first time predictions for top-quark pair differential distributions at the LHC at NNLO QCD accuracy and including EW corrections. For the latter we include…

### Unitarity, analyticity, dispersion relations, and resonances in strongly interacting $W_LW_L$, $Z_LZ_L$, and hh scattering

- Physics
- 2015

If the Electroweak Symmetry Breaking Sector turns out to be strongly interacting, the actively investigated effective theory for longitudinal gauge bosons plus Higgs can be efficiently extended to…

### The process ff-bar-->WLWL.

- Materials Science, MathematicsPhysical review. D, Particles and fields
- 1991

The calculation of the amplitude for the process f=t, which provides a check of the results of the equivalence theorem, according to which the leading energy term for the ${W}_{L} amplitude is given by the corresponding $\ensuremath{\varphi}$ amplitude.

### Light 'Higgs', yet strong interactions

- Physics
- 2013

The claimed finding of a light Higgs boson makes the minimal Standard Model unitary. Yet, we recall that the general low-energy dynamics for the minimal electroweak symmetry breaking sector with…

### Possible New Resonance from W_{L}W_{L}-hh Interchannel Coupling.

- PhysicsPhysical review letters
- 2015

This paper exposes this channel-coupling resonance from unitarity and dispersion relations encoded in the inverse amplitude method, applied to the electroweak chiral Lagrangian with a scalar Higgs boson.

### Effective theory of a dynamically broken electroweak Standard Model at NLO

- Physics
- 2012

A bstractWe consider the Standard Model as an effective theory at the weak scale v of a generic new strong interaction that dynamically breaks electroweak symmetry at the energy scale Λ ~ (few) TeV.…

### One-loop WLWL and ZLZL scattering from the electroweak Chiral Lagrangian with a light Higgs-like scalar

- Physics
- 2014

A bstractBy including the recently discovered Higgs-like scalar φ in the Electroweak Chiral Lagrangian, and using the Equivalence Theorem, we carry out the complete one-loop computation of the…