Monte Carlo tools for studies of non-standard electroweak gauge boson interactions in multi-boson processes: A Snowmass White Paper

Degrande, Celine; Eboli, Oscar; Feigl, Bastian; Jäger, Barbara; Kilian, Wolfgang; Mattelaer, Olivier; Rauch, Michael; Reuter, Jürgen; Sekulla, Marco; Wackeroth, Doreen

doi:10.48550/arxiv.1309.7890

Cited by 26 publications

(39 citation statements)

References 84 publications

(104 reference statements)

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“…Dimension-8 operators are described by using a linear representation of the spontaneously broken gauge symmetry of the SM. In this case, the anomalous quartic gauge boson couplings are built by extending the SM Lagrangian with terms including dimension-8 operators as this is the lowest dimension that defines the quartic gauge boson couplings without exhibiting triple gauge-boson couplings [2]. Therefore, the linear effective Lagrangians can be given as follows…”

Section: Introductionmentioning

confidence: 99%

Model independent study for the anomalous quartic $WWγγ$ couplings at Future Electron-Proton Colliders

Ari,

Gurkanli,

Billur

et al. 2018

Preprint

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The Large Hadron Electron Collider and the Future Circular Collider-hadron electron with high center-of-mass energy and luminosity allow to better understand the Standard Model and to examine new physics beyond the Standard Model in the electroweak sector. Multi-boson processes permit for a measurement of the gauge boson self-interactions of the Standard Model that can be used to determine the anomalous gauge boson couplings. For this purpose, we present a study of the process ep → ν e γγj at the Large Hadron Electron Collider with center-of-mass energies of 1.30, 1.98 TeV and at the Future Circular Collider-hadron electron with center-of-mass energies of 7.07, 10 TeV to interpret the anomalous quartic W W γγ gauge couplings using a model independent way in the framework of effective field theory. We obtain the sensitivity limits at 95% Confidence Level on 13 different anomalous couplings arising from dimension-8 operators.

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Section: Introductionmentioning

confidence: 99%

Model independent study for the anomalous quartic $WWγγ$ couplings at Future Electron-Proton Colliders

Ari,

Gurkanli,

Billur

et al. 2018

Preprint

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“…This introduces anomalous quartic gauge couplings leading to enhanced triboson production at high transverse photon energies as can be seen by the dashed histograms in Figure 2. However, unitarity can be violated in these descriptions and a dipole form factor is used in this interpretation to mitigate the effect [11]. To increase the sensitivity of this study, the photon E T threshold is increased to 120 GeV for the eνµνγ final state and to 200 GeV for the eνjjγ and µνjjγ final states.…”

Section: Resultsmentioning

confidence: 99%

Studying $WWγ$ and $WZγ$ production in proton-proton collisions at √s = 8 TeV with the ATLAS experiment

Djuvsland¹

2018

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2017)

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Quartic gauge couplings are tested by this study of the production of W W γ and W Zγ events in 20.2 fb −1 of proton-proton collisions at a centre-of-mass energy of √ s = 8 TeV recorded with the ATLAS detector at the LHC. The final state of W W γ events containing an electron, a muon and a photon is analysed as well as the final states of W W γ and W Zγ production containing an electron or a muon, two jets and a photon. For all final states two different fiducial regions are defined: one yielding the best sensitivity to the production cross-section of the process and one optimised for the detection of new physical phenomena. In the former region, the W W γ production cross-section is computed and in both regions, upper limits on the W W γ and W Zγ production cross-section are derived. The results obtained in the second phase space are combined for the interpretation in the context of anomalous quartic gauge couplings using an effective field theory.

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“…In this regard, the extension of the effective SM-Lagrangian is done by introducing additional dimension-8 operators for the aQGC. The formalism of the aQGC has been widely discussed in the literature [49][50][51][52][53][54][55]. The effective Lagrangian that gives all quartic couplings is given as follows…”

Section: Dimension-8 Effective Operators For the Zγγγ And Zzγγ Aqgcmentioning

confidence: 99%

“…According to the structure of the operator, there are three classes of genuine aQGC operators as shown in Eq. ( 3) [53,55].…”

Section: Dimension-8 Effective Operators For the Zγγγ And Zzγγ Aqgcmentioning

confidence: 99%

Study of the projected sensitivity on the anomalous quartic gauge couplings via $Zγγ$ production at the CLIC

E.¹,

Ari²,

Köksal³

et al. 2021

Preprint

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Gauge boson self-couplings are completely defined by the non-abelian gauge symmetry of the Standard Model (SM), thus direct search for these couplings are extremely significant in understanding the gauge structure of the SM. However, the possible deviation from the SM predictions of gauge boson self-couplings would be a sign of the presence of new physics beyond the SM. In this work, we study the sensitivities on the anomalous couplings defined by dimension-8 operators related to the ZZγγ and Zγγγ quartic vertices through the process e + e − → Zγγ with Z-boson decaying to charged leptons at the Compact Linear Collider(CLIC). We analyze the center-ofmass energy of 3 TeV, integrated luminosities of L = 1, 4, 5 ab −1 , systematic uncertainties of δ sys = 0%, 5%, 10%, and unpolarized and polarized electron beams for extraction of expected sensitivity on the anomalous f T,j /Λ 4 couplings at 95% confidence level, which are especially sensitive to the Zγγ channel. It is clear from the results that if the systematic error is improved, we expect better limits on the couplings. However, the best limits obtained on the anomalous quartic couplings for the process e + e − → Zγγ with √ s = 3 TeV, L = 5 ab −1 and δ sys = 0% can be approximately improved up to about two times better than the limits obtained with δ sys = 10%.Our sensitivities on the anomalous quartic couplings with δ sys = 0% can set more stringent sensitivity by two orders of magnitude with respect to the best sensitivity derived from the current experimental limits. Finally, with initial electron beam polarization, the sensitivity of anomalous quadratic couplings improves by almost a factor of 1.2.

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Monte Carlo tools for studies of non-standard electroweak gauge boson interactions in multi-boson processes: A Snowmass White Paper

Cited by 26 publications

References 84 publications

Model independent study for the anomalous quartic $WWγγ$ couplings at Future Electron-Proton Colliders

Model independent study for the anomalous quartic $WWγγ$ couplings at Future Electron-Proton Colliders

Studying $WWγ$ and $WZγ$ production in proton-proton collisions at √s = 8 TeV with the ATLAS experiment

Study of the projected sensitivity on the anomalous quartic gauge couplings via $Zγγ$ production at the CLIC

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