New features in the JHU generator framework: Constraining Higgs boson properties from on-shell and off-shell production

Gritsan, A. V.; Roskes, J.; Sarica, U.; Schulze, Markus; Xiao, M.; Zhou, Y.

doi:10.1103/physrevd.102.056022

“…Projections for future bounds on possible CP-admixtures of the discovered Higgsboson based on gg → H +2 jets data were obtained in refs. [20][21][22], focusing on current and future Run 3 data. Experimental bounds on the top-Yukawa coupling under the CP-even coupling assumption have been obtained more recently using an integrated luminosity of 36 fb −1 in the tt tt channel [23] and tt kinematic distributions [24].…”

Section: Jhep11(2020)127mentioning

confidence: 99%

“…In addition to the total rate, also the p T -shape of the Higgs boson produced via gg → ZH is sensitive to the CP-nature of the top-Yukawa coupling (alongside other kinematic distributions, see e.g. [22]). This distribution can be studied in the simplified template cross-section (STXS) framework [47].…”

Section: Higgs-top-quark Interaction At Hadron Collidersmentioning

confidence: 99%

Indirect $$ \mathcal{CP} $$ probes of the Higgs-top-quark interaction: current LHC constraints and future opportunities

Bahl

¹

,

Bechtle

²

,

Heinemeyer

³

et al. 2020

J. High Energ. Phys.

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The $$ \mathcal{CP} $$ CP structure of the Higgs boson in its coupling to the particles of the Standard Model is amongst the most important Higgs boson properties which have not yet been constrained with high precision. In this study, all relevant inclusive and differential Higgs boson measurements from the ATLAS and CMS experiments are used to constrain the $$ \mathcal{CP} $$ CP -nature of the top-Yukawa interaction. The model dependence of the constraints is studied by successively allowing for new physics contributions to the couplings of the Higgs boson to massive vector bosons, to photons, and to gluons. In the most general case, we find that the current data still permits a significant $$ \mathcal{CP} $$ CP -odd component in the top-Yukawa coupling. Furthermore, we explore the prospects to further constrain the $$ \mathcal{CP} $$ CP properties of this coupling with future LHC data by determining tH production rates independently from possible accompanying variations of the $$ t\overline{t}H $$ t t ¯ H rate. This is achieved via a careful selection of discriminating observables. At the HL-LHC, we find that evidence for tH production at the Standard Model rate can be achieved in the Higgs to diphoton decay channel alone.

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“…The trigger efficiency is derived from data using a sample of 4 events collected by the singlelepton triggers and a method based on the "tag and probe" Table 1 The minimal p T of the leading/subleading leptons for the main di-electron (e/e), di-muon (μ/μ), and electron-muon (e/μ, μ/e) highlevel trigger algorithms used in the H → 4 analysis in 2016, 2017, and 2018 e/e (GeV) μ/μ (GeV) e/μ, μ/e (GeV) [44][45][46] generator for the five main production processes: gluon fusion (ggH) [47], vector boson fusion (VBF) [48], associated production with a vector boson (VH, where V is a W or a Z boson) [49], and associated production with a pair of top quarks (tt H) [50]. The ZH production occurs in two ways, qq → ZH and a much smaller contribution from gg → ZH, which is simulated at leading order (LO) using jhugen 7.3.0 [51][52][53][54][55]. In addition to the five main production processes, the contributions due to H boson production in association with a single top quark (tH) and either a quark (tHq) or a W boson (tHW) are simulated at LO using jhugen 7.0.2 and MadGraph5_amc@nlo 2.2.2 [56], respectively.…”

Section: Data and Simulated Samplesmentioning

confidence: 99%

“…The full kinematic information from each event using either the H boson decay products and/or the associated particles in the H boson production is extracted by means of matrix element calculations and is used to form several kinematic discriminants. These computations rely on the MELA package [51][52][53]55] and exploit the jhugen matrix elements for the signal and the mcfm matrix elements for the background. Both the H boson decay kinematics and the kinematics of the associated production of H + 1 jet, H + 2 jets, VBF, ZH, and WH are explored.…”

Section: Kinematic Discriminantsmentioning

confidence: 99%

Measurements of production cross sections of the Higgs boson in the four-lepton final state in proton–proton collisions at $$\sqrt{s} = 13\,\text {TeV} $$

Sirunyan

¹

,

Tumasyan

²

,

Adam

³

et al. 2021

Self Cite

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Production cross sections of the Higgs boson are measured in the $${\mathrm{H}} \rightarrow {\mathrm{Z}} {\mathrm{Z}} \rightarrow 4\ell $$ H → Z Z → 4 ℓ ($$\ell ={\mathrm{e}},{{{\upmu }}_{\mathrm{}}^{\mathrm{}}} $$ ℓ = e , μ ) decay channel. A data sample of proton–proton collisions at a center-of-mass energy of 13$$\,\text {Te}\text {V}$$ Te , collected by the CMS detector at the LHC and corresponding to an integrated luminosity of 137$$\,\text {fb}^{-1}$$ fb - 1 is used. The signal strength modifier $$\mu $$ μ , defined as the ratio of the Higgs boson production rate in the $$4\ell $$ 4 ℓ channel to the standard model (SM) expectation, is measured to be $$\mu =0.94 \pm 0.07 \,\text {(stat)} ^{+0.09}_{-0.08} \,\text {(syst)} $$ μ = 0.94 ± 0.07 (stat) - 0.08 + 0.09 (syst) at a fixed value of $$m_{{\mathrm{H}}} = 125.38\,\text {Ge}\text {V} $$ m H = 125.38 Ge . The signal strength modifiers for the individual Higgs boson production modes are also reported. The inclusive fiducial cross section for the $${\mathrm{H}} \rightarrow 4\ell $$ H → 4 ℓ process is measured to be $$2.84^{+0.23}_{-0.22} \,\text {(stat)} ^{+0.26}_{-0.21} \,\text {(syst)} \,\text {fb} $$ 2 . 84 - 0.22 + 0.23 (stat) - 0.21 + 0.26 (syst) fb , which is compatible with the SM prediction of $$2.84 \pm 0.15 \,\text {fb} $$ 2.84 ± 0.15 fb for the same fiducial region. Differential cross sections as a function of the transverse momentum and rapidity of the Higgs boson, the number of associated jets, and the transverse momentum of the leading associated jet are measured. A new set of cross section measurements in mutually exclusive categories targeted to identify production mechanisms and kinematical features of the events is presented. The results are in agreement with the SM predictions.

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“…The method of moments provides a transparent alternative to complement other multivariate techniques such as Optimal Observables [62,63], the matrix element likelihood analysis (MELA) [64,65] or other recently proposed methodologies involving Machine Learning [66]. In particular, MELA is currently the main technique used by the experiments to study the tensor structure of gauge-Higgs couplings.…”

Section: Jhep06(2021)031mentioning

confidence: 99%

A fully differential SMEFT analysis of the golden channel using the method of moments

Banerjee

¹

,

Gupta

²

,

Ochoa-Valeriano

³

et al. 2021

J. High Energ. Phys.

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The Method of Moments is a powerful framework to disentangle the relative contributions of amplitudes of a specific process to its various phase space regions. We apply this method to carry out a fully differential analysis of the Higgs decay channel h → 4ℓ and constrain gauge-Higgs coupling modifications parametrised by dimension-six effective operators. We find that this analysis approach provides very good constraints and minimises degeneracies in the parameter space of the effective theory. By combining the decay h → 4ℓ with Higgs-associated production processes, Wh and Zh, we obtain the strongest reported bounds on anomalous gauge-Higgs couplings.

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New features in the JHU generator framework: Constraining Higgs boson properties from on-shell and off-shell production

Cited by 50 publications

References 125 publications

Indirect $$ \mathcal{CP} $$ probes of the Higgs-top-quark interaction: current LHC constraints and future opportunities

Indirect $$ \mathcal{CP} $$ probes of the Higgs-top-quark interaction: current LHC constraints and future opportunities

Measurements of production cross sections of the Higgs boson in the four-lepton final state in proton–proton collisions at $$\sqrt{s} = 13\,\text {TeV} $$

A fully differential SMEFT analysis of the golden channel using the method of moments

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