Fermion pair production at $e^- e^+$ linear collider experiments in GUT inspired gauge-Higgs unification

Funatsu, Shuichiro; Hatanaka, Hisaki; Hosotani, Yutaka; Orikasa, Yuta; Yamatsu, Naoki

doi:10.48550/arxiv.2006.02157

Cited by 3 publications

(13 citation statements)

References 80 publications

(129 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[22][23][24][25]. The phenomena of the GHU models below the electroweak (EW) scale are very close to those of the SM [25][26][27][28][29][30][31][32][33][34][35]. The gauge coupling constants of quarks and leptons to the Z and W bosons in the GHU model differ by less than 0.1% from the coupling constants in the SM for the parameter region that satisfies the current experiments, i.e., the Kaluza-Klein (KK) mass m KK 13 TeV and the AB phase θ H 0.1 [34].…”

Section: Introductionmentioning

confidence: 68%

“…As the same in fermion pair productions, we can define a left-right asymmetry [32,35,85,86,92] of the e − e + → Zh process as…”

Section: Kinematics Of E − E + → Zhmentioning

confidence: 99%

“…The SU (3) C × SO(5) W × U (1) X GHU models can be roughly classified into two types of models depending on whether the SO(5) W representations of the quarks and the leptons are vector or spinor representations. The GHU model whose fermions belong to the spinor representation of SO (5) W [25,[30][31][32][33][34][35] can be regarded as a low-energy effective description of the GHU model based on the SO (11) grand unified gauge symmetry [37][38][39][40][41][42][43], where the SM gauge symmetry and field content are incorporated into grand unified theory (GUT) [44][45][46][47][48][49] in higher dimensional framework [50][51][52][53][54][55][56][57][58][59][60][61][62][63][64]. We focus on the spinor type model in this paper.…”

Section: Introductionmentioning

confidence: 99%

“…In the GHU model, θ H 0.10 and m KK 13TeV are obtained as parameter constraints of the GHU model by using the Z and W boson search results for the pp → ν and pp → − + processes at the LHC at √ s = 13 TeV with up to 140 fb −1 data [65][66][67][68][69][70]. The e − e + collider experiment is capable of searching for signals in the GHU model up to the KK mass scale m KK of tens of times the center-of-mass energy √ s of e − e + [32,35,[71][72][73][74][75][76][77][78][79][80][81][82]. Large parity violation appears in the couplings of quarks and leptons to KK gauge bosons, especially to the first KK modes.…”

Section: Introductionmentioning

confidence: 99%

“…In Ref. [32], the SM and the GHU model are compared in detail for observables such as cross sections, forward-backward asymmetries [83,84], left-right asymmetries [83][84][85][86], and left-right forward-backward asymmetries [84,[87][88][89][90] in the processes e − e + → f f (f f = µ − µ + , cc, b b, t t). For example, the total cross section of the e − e + → µ − µ + process at √ s = 250 GeV in the GHU model whose m KK 13 TeV and θ H = 0.10 is different at most about 3% compared to that in the SM, where it strongly depends on the initial polarizations of the electron and the positron.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Single Higgs Boson Production at Electron-Positron Colliders in Gauge-Higgs Unification

Funatsu¹,

Hatanaka²,

Orikasa³

et al. 2023

Preprint

View full text Add to dashboard Cite

We examine contributions to single Higgs boson production processes via Z and W bosons in the SU (3) C × SO(5) W × U (1) X gauge-Higgs unification (GHU) model. In particular, we analyze the cross sections of three single Higgs boson production processes e − e + → Zh, e − e + → ν νh, and e − e + → e − e + h in the SM and the GHU model. For the Higgs strahlung process e − e + → Zh, we show that for a parameter region satisfying the current experimental constraints, a maximum deviation from the SM is about up to 6% for the center-of-mass energy of the initial electron and positron √ s = 250 GeV and that from the SM is about up to 20% for √ s = 500 GeV, depending on the initial polarization of electron and positron. The deviation from the SM is monotonically increasing with respect to √ s for √ s 1 TeV. By using the Higgs strahlung process, it is possible to explore up to the region of tens of TeV in terms of the Kaluza-Klein (KK) mass. We also show that the sign of the bulk mass of a lepton multiplet in the GHU model can be determined by examining the deviation of the left-right symmetry of the e − e + → Zh process from the SM. The contributions to the cross sections of the e − e + → ν νh and e − e + → e − e + h processes via the Z and W bosons are relatively small compared to that for e − e + → Zh at least for √ s ≤ 1 TeV. As is the same as in the SM, the e − e + → ν νh process gives a main contribution to the single Higgs boson production processes for √ s 500 GeV, but large deviations from the SM are only observed on energy scales close to the masses of the first KK gauge bosons or higher.

show abstract

Section: Introductionmentioning

confidence: 68%

“…As the same in fermion pair productions, we can define a left-right asymmetry [32,35,85,86,92] of the e − e + → Zh process as…”

Section: Kinematics Of E − E + → Zhmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Single Higgs Boson Production at Electron-Positron Colliders in Gauge-Higgs Unification

Funatsu¹,

Hatanaka²,

Orikasa³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

Single Higgs boson production at electron-positron colliders in gauge-Higgs unification

Funatsu¹,

Hatanaka²,

Orikasa

et al. 2023

Phys. Rev. D

View full text Add to dashboard Cite

We examine W and Z boson pair production processes at electron-positron collider experiments in the SU (3) C × SO(5) W × U (1) X gauge-Higgs unification (GHU) model. We find that the deviation of the total cross section for the e − e + → W − W + process from the Standard Model (SM) in the GHU model with parameter sets, which are consistent with the current experiments, is about 0.5% to 1.5% and 0.6% to 2.2% for √ s = 250 GeV and 500 GeV, respectively, depending on the initial electron and positron polarization. We find that for the e − e + → ZZ process the deviation from the SM in the GHU model is at most 1%. We find that unitality bound for the e − e + → W − W + process is satisfied in the GHU model as in the SM, as a consequence of the relationship among coupling constants.

show abstract

Probing gauge-Higgs unification models at the ILC with quark–antiquark forward–backward asymmetry at center-of-mass energies above the Z mass

Irles,

Márquez,

Pöschl

et al. 2024

Eur. Phys. J. C

View full text Add to dashboard Cite

The International Linear Collider (ILC) will allow the precise study of $$e^{-}e^{+} \rightarrow q\bar{q}$$ e - e + → q q ¯ interactions at different center-of-mass energies from the $$Z$$ Z -pole to 1 TeV. In this paper, we discuss the experimental prospects for measuring differential observables in $$e^{-}e^{+} \rightarrow b\bar{b}$$ e - e + → b b ¯ and $$e^{-}e^{+} \rightarrow c\bar{c}$$ e - e + → c c ¯ at the ILC baseline energies, 250 and 500 GeV. The study is based on full simulation and reconstruction of the International Large Detector (ILD) concept. Two gauge-Higgs unification models predicting new high-mass resonances beyond the Standard Model are discussed. These models predict sizable deviations of the forward–backward observables at the ILC running above the Z mass and with longitudinally polarized electron and positron beams. The ability of the ILC to probe these models via high-precision measurements of the forward–backward asymmetry is discussed. Alternative scenarios at other energies and beam polarization schemes are also discussed, extrapolating the estimated uncertainties from the two baseline scenarios.

show abstract

Fermion pair production at $e^- e^+$ linear collider experiments in GUT inspired gauge-Higgs unification

Cited by 3 publications

References 80 publications

Single Higgs Boson Production at Electron-Positron Colliders in Gauge-Higgs Unification

Single Higgs Boson Production at Electron-Positron Colliders in Gauge-Higgs Unification

Single Higgs boson production at electron-positron colliders in gauge-Higgs unification

Probing gauge-Higgs unification models at the ILC with quark–antiquark forward–backward asymmetry at center-of-mass energies above the Z mass

Contact Info

Product

Resources

About