Single top partner production in the Higgs to diphoton channel in the Littlest Higgs Model with T -parity

Liu, Ning; Wu, Lei; Yang, Bingfang; Zhang, Mengchao

doi:10.1016/j.physletb.2015.12.066

Cited by 39 publications

(21 citation statements)

References 51 publications

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“…The prospect to observe double-Higgs production at the HL-LHC is considerably better because at 14 TeV the pp → hh production cross section amounts to O(35 fb) [2][3][4][5][6][7][8][9]. Measuring double-Higgs production at the HL-LHC however still remains challenging (see for instance [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27]) and as a result even with the full data set of 3 ab −1 only an O(1) determination of the trilinear Higgs coupling seems possible under optimistic assumptions. A second possibility consists in studying the effects that a modification of λ has at loop level in single-Higgs production.…”

Section: Jhep07(2017)083mentioning

confidence: 99%

Constraints on the trilinear Higgs coupling from vector boson fusion and associated Higgs production at the LHC

Bizon

Gorbahn

Haisch

et al. 2017

J. High Energ. Phys.

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Abstract:We examine the constraints on the trilinear Higgs coupling λ that originate from associated (V h) and vector boson fusion (VBF) Higgs production in pp collisions in the context of the Standard Model effective field theory. The 1-loop contributions to pp → V h and pp → jjh that stem from insertions of the dimension-6 operator O 6 = −λ H † H 3 are calculated and combined with the O(λ) corrections to the partial decay widths of the Higgs boson. Employing next-to-next-to-leading order QCD predictions, we analyse the sensitivity of current and forthcoming measurements of the signal strengths in V h and VBF Higgs production to changes in λ. We show that future LHC runs may be able to probe modifications of λ with a sensitivity similar to the one that is expected to arise from determinations of double-Higgs production. The sensitivity of differential V h and VBF Higgs distributions to a modified h 3 coupling is also studied.

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Section: Jhep07(2017)083mentioning

confidence: 99%

Constraints on the trilinear Higgs coupling from vector boson fusion and associated Higgs production at the LHC

Bizon

Gorbahn

Haisch

et al. 2017

J. High Energ. Phys.

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“…[13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29]). For example, the ATLAS study [26] implies that the ultimate sensitivity that the LHC can reach in the 2h → 2b2γ channel, will allow to set a 95% CL bound of…”

Section: Jhep10(2016)094mentioning

confidence: 99%

Indirect probes of the trilinear Higgs coupling: gg → h and h → γγ

Gorbahn

Haisch

2016

J. High Energ. Phys.

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In the framework of the Standard Model effective field theory, we examine the indirect constraints on the trilinear Higgs coupling λ that arise from Higgs production in gluon-gluon-fusion and diphoton Higgs decays. We calculate 2-loop contributions to the gg → h and h → γγ amplitudes that are affected by modifications of the trilinear Higgs-boson vertex. Based on our new results, we analyse the sensitivity of present and future measurements of the hgg and hγγ couplings to shifts in λ. Under the assumption that O 6 = −λ H † H 3 is the only dimension-6 operator that alters the trilinear Higgs interactions, we find that at present the considered loop-level probes provide stronger constraints than pp → 2h. At future high-energy colliders indirect O(5) determinations of the trilinear Higgs coupling may be possible, making precision measurements of gg → h and h → γγ a useful addition to direct extractions of λ through double-Higgs production.

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“…Before calculating the top partner production cross section, we firstly consider the constraints on the top partner mass from current measurements. We update the constraint on the LHT parameter in our previous works [51,52], where the global fit of the latest Higgs data, EWPOs, and 푏 measurements is performed. Thereinto, the constraints from the direct searches for Higgs data at Tevatron [53,54] and LHC [55,56] are obtained by the package HiggsSignals-1.4.0 [57,58], which is linked to the HiggsBounds-4.2.1 [59][60][61][62][63] library.…”

Section: Top Partner Production In + − Collisionmentioning

confidence: 99%

Top Partner Production at e+e- Collider in the Littlest Higgs Model with T-Parity

Wang

Yang

2017

Advances in High Energy Physics

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In the framework of the littlest Higgs Model with -parity, we discuss the top partner production at future + − collider. We calculate the cross sections of the top partner production processes and associated production processes of Higgs and top partner under current constraints. Then, we investigate the observability of the -odd top partner pair production through the process + − → − − → 퐻 퐻 in the dilepton channel for two -odd top partner masses 푇 − = 603 (708) GeV at √ = 1.5 TeV. We analyze the signal significance depending on the integrated luminosity and find that this signal is promising at the future high energy + − collider.

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Single top partner production in the Higgs to diphoton channel in the Littlest Higgs Model with T -parity

Cited by 39 publications

References 51 publications

Constraints on the trilinear Higgs coupling from vector boson fusion and associated Higgs production at the LHC

Constraints on the trilinear Higgs coupling from vector boson fusion and associated Higgs production at the LHC

Indirect probes of the trilinear Higgs coupling: gg → h and h → γγ

Top Partner Production at e+e- Collider in the Littlest Higgs Model with T-Parity

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