Associated production of single top and Higgs at the LHC in the littlest Higgs model with T-parity

Yang, Bingfang; Han, J.; Liu, Ning

doi:10.1007/jhep04(2015)148

Cited by 8 publications

(5 citation statements)

References 56 publications

(61 reference statements)

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“…• The direct measurements of top-Higgs coupling come mainly from the associated production of the top pair with Higgs boson and the single top associated production with the Higgs boson at the LHC. The former has the larger production rate [28][29][30][31][32][33][34][35][36][37], but the latter can be used to determine the sign of top-Higgs coupling [12,[38][39][40][41][42][43][44][45][46][47][48][49]. • The di-Higgs production is the only way to measure the Higgs self-coupling at the LHC, which is dominated by the gluon-gluon fusion mechanism.…”

Section: Introductionmentioning

confidence: 99%

“…Using the bounds on top-Higgs coupling, we examine the effect of anomalous top-Higgs coupling on the production rates of the Higgs processes pp → tth, thj, hh at the LHC and e + e − → hZ, hγ at future lepton colliders, such as ILC, FCC-ee and CEPC.• The direct measurements of top-Higgs coupling come mainly from the associated production of the top pair with Higgs boson and the single top associated production with the Higgs boson at the LHC. The former has the larger production rate [28][29][30][31][32][33][34][35][36][37], but the latter can be used to determine the sign of top-Higgs coupling [12,[38][39][40][41][42][43][44][45][46][47][48][49].…”

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confidence: 99%

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Implications of CP -violating top-Higgs couplings at the LHC and Higgs factories

Kobakhidze¹,

Liu²,

Wu³

et al. 2017

Phys. Rev. D

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We utilise the LHC Run-1 and -2 Higgs data to constrain the CP-violating top-Higgs couplings.In order to satisfy the current full Higgs data sets at 2σ level, the CP-odd component C With the new bound, we explore the impact on the CP-violating top-Higgs couplings in the Higgs production processes pp → tth, thj, hh at 13 TeV LHC, and e + e − → hZ, hγ at future 240 GeV Higgs factories. We find that the cross sections of pp → tth, pp → thj, pp → hh, e + e − → hZ and e + e − → hγ can be enhanced up to 1.41, 1.18, 2.20, 1.001 and 1.09 times as large as the SM predictions, respectively. The future precision measurement of the process e + e − → hγ with an accuracy of 5% will be able to constrain |C p t | < 0.19 at most at a 240 GeV e + e − Higgs factory.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Implications of CP -violating top-Higgs couplings at the LHC and Higgs factories

Kobakhidze¹,

Liu²,

Wu³

et al. 2017

Phys. Rev. D

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“…The other direct way is to observe the single top associated production with the Higgs boson. Such a process has a small cross section (18.28 fb at 8 TeV LHC) but is advocated to determine the sign of the top-Higgs coupling at the LHC [63][64][65][66][67][68][69][70][71][72][73][74][75][76][77][78][79][80][81][82]. Recently, the CMS collaboration has presented the result on thj searches in the h → γγ channel, and obtained a weak bound on the cross section of events with inverted top-Higgs coupling [83].…”

Section: Jhep09(2015)008mentioning

confidence: 99%

Enhancing t t ¯ h h $$ t\overline{t}hh $$ production through CP-violating top-Higgs interaction at the LHC and future colliders

Liu

Zhang

Han

et al. 2015

J. High Energ. Phys.

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The measurement of Higgs self-coupling is one of the most crucial physics goals at the future colliders. At the LHC, the di-Higgs production is a main way to measure the Higgs trilinear coupling. As a complementary to the di-Higgs production, tthh process may open a new avenue to measure di-Higgs physics at the LHC and a future 100 TeV pp collider or a high energy e + e − collider since the extra tt in the final states may efficiently suppress the backgrounds. However, such a kind of process is also controlled by the topHiggs coupling. In this work, we investigate the impact of CP-violating top-Higgs coupling on tthh production at the LHC, e + e − and a 100 TeV hadron collider under the current Higgs data. Within 2σ Higgs data allowed parameter region, we find that the cross section of tthh at the LHC-14 TeV, e + e − -1 TeV and VHE-LHC/SPPC-100 TeV can be enhanced up to 2.1 times the SM predictions. The future precise measurement of Higgs coupling will reveal the nature of top-Higgs interaction and improve the sensitivity of the determination of Higgs self-coupling through tthh production.

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“…(a) the production of the Higgs Boson in association with top pair [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47] and (b) associated production of the Higgs Boson with single top [48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64] at the LHC. The production rate of the Higgs boson in association with the top pair is relatively high and is dominant, therefore, crucial to potentially disentangle the new physics effects [43,[65][66][67][68].…”

Section: Introductionmentioning

confidence: 99%

tt¯H Interactions and T-odd Correlations at Hadron Colliders

Tiwari,

Gupta

2024

J. Phys. G: Nucl. Part. Phys.

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We explore $\mathcal CP$-violation effects of Higgs-top interactions in the associated production of a Higgs boson with top-pair in the dileptonic decay modes of top-quark originating from proton proton collisions $pp \to t\bar{t}H \to (l^+ \nu_l b)(l^{-} \bar{\nu_l} \bar{b})H$ at NLO in QCD matched to parton shower via T-odd observables using momenta of various particles involved in the process. In particular, we predict the constraints on the $\mathcal CP$-violating $t\bar{t}H$ coupling obtained through the production asymmetries associated with the T-odd observables in the dileptonic decay channel of the $t\bar{t}$ pair for the LHC with centre-of-mass energy of 13 TeV and an integrated luminosity of 139 fb$^{-1}$. We also present the corresponding limits for future hadron colliders, namely the High Luminosity LHC (HL-LHC) and the Future Circular Collider (FCC-HH). Our estimates of the $t\bar{t}H$ interaction strength reveal that the upper bound on pseudoscalar coupling $c_p$ corresponding to the largest asymmetry would be of about $1.57 \times 10^{-2}$ at 2$\sigma$ C.L. for $c_s$ = 1 at the LHC with $\sqrt{S}$ = 13 TeV for an integrated luminosity of 139 fb$^{-1}$. The respective limits for HL-LHC and FCC-hh with the projected Luminosities of 3 ab$^{-1}$ and 30 ab$^{-1}$ are found to be to $2.7 \times 10^{-3}$ and $1.3\times 10^{-4}$ respectively at 2$\sigma$ C.L.

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Associated production of single top and Higgs at the LHC in the littlest Higgs model with T-parity

Cited by 8 publications

References 56 publications

Implications of CP -violating top-Higgs couplings at the LHC and Higgs factories

Implications of CP -violating top-Higgs couplings at the LHC and Higgs factories

Enhancing t t ¯ h h $$ t\overline{t}hh $$ production through CP-violating top-Higgs interaction at the LHC and future colliders

tt¯H Interactions and T-odd Correlations at Hadron Colliders

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