Vbfnlo: A parton level Monte Carlo for processes with electroweak bosons

Arnold, Ken; Bähr, M.; Bozzi, Giuseppe; Campanario, Francisco; Englert, Christoph; Figy, Terrance; Greiner, Nicolas; Hackstein, C.; Hankele, V.; Jäger, Barbara; Klamke, G.; Kubocz, Michael; Oleari, C.; Plätzer, Simon; Prestel, Stefan; Worek, Małgorzata; Zeppenfeld, D.

doi:10.1016/j.cpc.2009.03.006

Cited by 369 publications

(294 citation statements)

References 37 publications

Supporting

Mentioning

290

Contrasting

Order By: Relevance

“…We can study the approach to the decoupling limit by writing α − β ¼ δ − π=2 and consider the parameter dependence of R BDRS . Assuming we are close to the decoupling limit and expanding to first order in δ we find that with the gluon-initiated process omitted μb b ðqq → hZÞ ≈ 1 − δð0.2 cot β þ 0.7 tan βÞ; (16) whereas with the gluon-initiated process included μb b ðqq; gg → hZÞ ≈ 1 − δð0.6 cot β þ 0.7 tan βÞ; (17) and the dependence on deviations from the decoupling limit is much stronger at low tan β. This is not surprising as the gluon-initiated associated production introduces strong dependence of the cross section on the Higgs-top quark coupling, which in this limit is given by c t ≈ 1 þ δ cot β.…”

Section: B Boosted Associated Productionmentioning

confidence: 93%

Gluon-initiated associated production boosts Higgs physics

2014

View full text Add to dashboard Cite

Publisher's copyright statement:Reprinted with permission from the American Physical Society: Physical Review D 89, 013013 c 2014 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modi ed, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Analyses of boosted Higgs bosons from associated production comprise some of the main search channels for the Higgs boson at the LHC. The gluon-initiated gg → hZ subprocess has largely been ignored in phenomenological analyses of boosted associated production although this contribution is sizable as the p T spectrum for this process is maximized in the boosted regime due to the top quark loop threshold. In this paper, we discuss this contribution to boosted pp → hZ analyses in detail. We find there are previously overlooked modifications of standard model Higgs rates at the LHC which depend on the p T cuts applied and can be significant. There are also important consequences for physics beyond the standard model as the gg → hZ process introduces significant dependence on the magnitude and sign of the Higgs-top quark coupling c t , which is overlooked if it is assumed that associated production depends only on the Higgs-Z boson coupling as c 2 V . This new dependence on c t impacts interpretations of Higgs rates in the contexts of supersymmetry, two Higgs doublet models, and general scenarios with modified couplings. We suggest that these effects be included in current and future LHC boosted Higgs analyses.

show abstract

Section: B Boosted Associated Productionmentioning

confidence: 93%

Gluon-initiated associated production boosts Higgs physics

2014

View full text Add to dashboard Cite

show abstract

“…We have implemented this calculation in the VBFNLO code [92] in which we have provided the tensor structure depicted in figure 3 which has been calculated with MadGraph [101]. Up to now the VBFNLO implementation only involves on-shell Higgs pairs.…”

Section: The Vector Boson Fusion Processmentioning

confidence: 99%

“…In the next section, we discuss the QCD radiative corrections to double Higgs production in the gluon fusion, vector boson fusion and Higgs-strahlung processes (the ttHH process will be only considered at tree-level) and how they are implemented in the programs HPAIR [91], VBFNLO [92] and a code developed by us to evaluate the inclusive cross sections in Higgs-strahlung processes. In section 3, we evaluate the various theoretical uncertainties affecting these cross sections and collect at M H = 125 GeV the double Higgs production cross sections at the various LHC energies.…”

Section: Jhep04(2013)151mentioning

confidence: 99%

The measurement of the Higgs self-coupling at the LHC: theoretical status

Baglio

Djouadi

Gröber

et al. 2013

J. High Energ. Phys.

330

407

View full text Add to dashboard Cite

Now that the Higgs boson has been observed by the ATLAS and CMS experiments at the LHC, the next important step would be to measure accurately its properties to establish the details of the electroweak symmetry breaking mechanism. Among the measurements which need to be performed, the determination of the Higgs self-coupling in processes where the Higgs boson is produced in pairs is of utmost importance. In this paper, we discuss the various processes which allow for the measurement of the trilinear Higgs coupling: double Higgs production in gluon fusion, vector boson fusion, double Higgs-strahlung and associated production with a top quark pair. We first evaluate the production cross sections for these processes at the LHC with center-of-mass energies ranging from the present √ s = 8 TeV to √ s = 100 TeV, and discuss their sensitivity to the trilinear Higgs coupling. We include the various higher order QCD radiative corrections, at next-to-leading order for gluon and vector boson fusion and at next-to-next-to-leading order for associated double Higgs production with a gauge boson. The theoretical uncertainties on these cross sections are estimated. Finally, we discuss the various channels which could allow for the detection of the double Higgs production signal at the LHC and estimate their potential to probe the trilinear Higgs coupling.

show abstract

“…Then we use the VBFNLO code [35][36][37] to perform the phase space integration, where we set the parton distribution functions (PDFs) as CTEQ6L1 [38].…”

Section: The MC Simulationmentioning

confidence: 99%

Probing triple-Higgs productions via4b2γdecay channel at a 100 TeV hadron collider

et al. 2016

View full text Add to dashboard Cite

The quartic self-coupling of the Standard Model Higgs boson can only be measured by observing the triple-Higgs production process, but it is challenging for the LHC Run 2 or ILC at a few TeV because of its extremely small production rate. In this paper, we present a detailed MC simulation study of the triple-Higgs production through gluon fusion at a 100 TeV hadron collider and explore the feasibility of observing this production mode. We focus on the decay channel HHH → bbbbγγ, investigating detector effects and optimizing the kinematic cuts to discriminate the signal from the backgrounds. Our study shows that in order to observe the Standard Model triple-Higgs signal, the integrated luminosity of a 100 TeV hadron collider should be greater than 1.8 × 10 4 ab −1 . We also explore the dependence of the cross section upon the trilinear (λ 3 ) and quartic (λ 4 ) self-couplings of the Higgs. We find that, through a search in the triple Higgs production, the parameters λ 3 and λ 4 can be restricted to the ranges [−1, 5] and [−20, 30], respectively. We also examine how new physics can change the production rate of triple-Higgs events. For example, in the singlet extension of the Standard Model, we find that the triple-Higgs production rate can be increased by a factor of O(10).

show abstract

Vbfnlo: A parton level Monte Carlo for processes with electroweak bosons

Cited by 369 publications

References 37 publications

Gluon-initiated associated production boosts Higgs physics

Gluon-initiated associated production boosts Higgs physics

The measurement of the Higgs self-coupling at the LHC: theoretical status

Probing triple-Higgs productions via4b2γdecay channel at a 100 TeV hadron collider

Contact Info

Product

Resources

About