Probing 6D operators at future e−e+ colliders

Chiu, Wen Han; Leung, Sze Ching Iris; Liu, Tao; Lyu, Kun-Feng; Wang, Lian-Tao

doi:10.1007/jhep05(2018)081

Cited by 16 publications

(7 citation statements)

References 85 publications

(138 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, we have turned off all of these effects and simply assumed that they can be constrained sufficiently well for our purpose, by the electroweak and Higgs precision measurements at future colliders (for recent studies, see, e.g., Refs. [40][41][42][43]).…”

Section: Discussionmentioning

confidence: 99%

Probing the quartic Higgs boson self-interaction

et al. 2018

Self Cite

View full text Add to dashboard Cite

The Higgs self-interactions play a crucial role in exploring the underlying mechanisms of electroweak symmetry breaking and the nature of the phase transition involved. In this article, we propose to probe the quartic Higgs self-interaction at lepton and hadron colliders, via the di-Higgs productions. We analyze the contributions of the quartic Higgs coupling, including the renormalization of the cubic Higgs coupling and the modification of the VVhh form factor, to the vector boson-fusion and the vector boson-associated di-Higgs productions at one-loop level. Such an effect is independent of the choice of gauge fixing, if the quartic Higgs coupling is decoupled from other couplings in the contexts considered. Notably, a combination of these two di-Higgs productions is important for optimizing the collider sensitivities to probe the quartic Higgs coupling. With this guideline, we explore the International Linear Collider and Compact Linear Collider sensitivities, and find that the International Linear Collider has the potential to measure the quartic Higgs coupling, normalized by its standard model value, with a precision of ∼ AE25 (500 GeV, 4 ab −1 þ 1 TeV, 2.5 ab −1) and ∼ AE20 (500 GeV, 4 ab −1 þ 1 TeV, 8 ab −1), at 1σ C:L:, after marginalizing the cubic Higgs coupling in the χ 2 analysis. The dependence on the renormalization scheme of the cubic Higgs coupling is discussed.

show abstract

Section: Discussionmentioning

confidence: 99%

Probing the quartic Higgs boson self-interaction

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Our study extends and complements that of refs. [2,[12][13][14][15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

On the future of Higgs, electroweak and diboson measurements at lepton colliders

Blas

Durieux

Grojean

et al. 2019

J. High Energ. Phys.

View full text Add to dashboard Cite

LEP precision on electroweak measurements was sufficient not to hamper the extraction of Higgs couplings at the LHC. But the foreseen permille-level Higgs measurements at future lepton colliders might suffer from parametric electroweak uncertainties in the absence of a dedicated electroweak program. We perform a joint, complete and consistent effective-field-theory analysis of Higgs and electroweak processes. The full electroweaksector dependence of the e + e − → W W production process is notably accounted for, using statistically optimal observables. Up-to-date HL-LHC projections are combined with CEPC, FCC-ee, ILC and CLIC ones. For circular colliders, our results demonstrate the importance of a new Z-pole program for the robust extraction of Higgs couplings. At linear colliders, we show how exploiting multiple polarizations and centre-of-mass energies is crucial to mitigate contaminations from electroweak parameter uncertainties on the Higgs physics program. We also investigate the potential of alternative electroweak measurements to compensate for the lack of direct Z-pole run, considering for instance radiative return to these energies. Conversely, we find that Higgs measurements at linear colliders could improve our knowledge of the Z couplings to electrons.

show abstract

“…[50], as well as similar studies in Refs. [49,51,64,65]. The normalization of Wilson coefficients in Table 1 is different from that defined in Eq.…”

Section: Operatormentioning

confidence: 99%

Universal relations in composite Higgs models

Liu

Low

Yin

2019

J. High Energ. Phys.

View full text Add to dashboard Cite

We initiate a phenomenological study of "universal relations" in composite Higgs models, which are dictated by nonlinear shift symmetries acting on the 125 GeV Higgs boson. These are relations among one Higgs couplings with two electroweak gauge bosons (HVV), two Higgses couplings with two electroweak gauge bosons (HHVV), one Higgs couplings with three electroweak gauge bosons (HVVV), as well as triple gauge boson couplings (TGC), which are all controlled by a single input parameter: the decay constant f of the pseudo-Nambu-Goldstone Higgs boson. Assuming custodial invariance in strong sector, the relation is independent of the symmetry breaking pattern in the UV, for an arbitrary symmetric coset G/H. The complete list of corrections to HVV, HHVV, HVVV and TGC couplings in composite Higgs models is presented to all orders in 1/f , and up to four-derivative level, without referring to a particular G/H. We then present several examples of universal relations in ratios of coefficients which could be extracted experimentally. Measuring the universal relation requires a precision sensitive to effects of dimension-8 operators in the effective Lagrangian and highlights the importance of verifying the tensor structure of HHVV interactions in the standard model, which remains untested to date. arXiv:1809.09126v1 [hep-ph]

show abstract

Probing 6D operators at future e−e+ colliders

Cited by 16 publications

References 85 publications

Probing the quartic Higgs boson self-interaction

Probing the quartic Higgs boson self-interaction

On the future of Higgs, electroweak and diboson measurements at lepton colliders

Universal relations in composite Higgs models

Contact Info

Product

Resources

About