Unravelling an extended quark sector through multiple Higgs production?

Dawson, S.; Furlan, Elisabetta; Lewis, Ian M.

doi:10.1103/physrevd.87.014007

Cited by 90 publications

(86 citation statements)

References 90 publications

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“…This means that for Higgs pair production m top ≫ √ŝ is never fulfilled for M H = 125 GeV so that the LET approximation is not valid at LO [78,79].…”

Section: Jhep04(2013)151mentioning

confidence: 99%

“…These stem from the variation of the renormalization and factorization scales that enter the processes (and which gives a rough measure of the missing higher order contributions), the uncertainties in the parton distribution functions (PDF) and the associated one on the strong coupling constant α s and, in the case of the gg → HH process, the uncertainty from the use of an effective approach with an infinitely heavy virtual top quark, to derive the NLO corrections (see also ref. [78,79]). This will be done in much the same way as for the more widely studied single Higgs production case [77,80].…”

Section: Jhep04(2013)151mentioning

confidence: 99%

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

Baglio

Djouadi

Gröber

et al. 2013

J. High Energ. Phys.

325

407

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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.

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“…This means that for Higgs pair production m top ≫ √ŝ is never fulfilled for M H = 125 GeV so that the LET approximation is not valid at LO [78,79].…”

Section: Jhep04(2013)151mentioning

confidence: 99%

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.

325

407

View full text Add to dashboard Cite

show abstract

“…Ref. [40] considers the modification to double Higgs production due to vector-like fermions in such a model.…”

Section: Jhep09(2014)130mentioning

confidence: 99%

Survey of vector-like fermion extensions of the Standard Model and their phenomenological implications

Ellis

Godbole

Gopalakrishna

et al. 2014

J. High Energ. Phys.

107

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With the renewed interest in vector-like fermion extensions of the Standard Model, we present here a study of multiple vector-like theories and their phenomenological implications. Our focus is mostly on minimal flavor conserving theories that couple the vector-like fermions to the SM gauge fields and mix only weakly with SM fermions so as to avoid flavor problems. We present calculations for precision electroweak and vector-like state decays, which are needed to investigate compatibility with currently known data. We investigate the impact of vector-like fermions on Higgs boson production and decay, including loop contributions, in a wide variety of vector-like extensions and their parameter spaces.

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“…Such vector-like fermions [but not necessarily charged under U (1) d ] have been recently proposed as a natural solution to the larger than expected diphoton rate in the early Higgs data at the LHC (for some examples, see Refs. [40][41][42][43][44][45][46][47][48][49][50]). …”

Section: B Dimension-5 Operatorsmentioning

confidence: 99%

Higgs decays as a window into the dark sector

et al. 2013

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A light vector boson, Z d , associated with a "dark sector" U (1) d gauge group has been introduced to explain certain astrophysical observations as well as low energy laboratory anomalies. In such models, the Higgs boson may decay into X + Z d , where X = Z, Z d or γ. Here, we provide estimates of those decay rates as functions of the Z d coupling through either mass-mixing (e.g. via an enlarged Higgs mechanism) or through heavy new fermion loops and examine the implied LHC phenomenology. Our studies focus on the higher mZ d case, several GeV, where the rates are potentially measurable at the LHC, for interesting regions of parameter spaces, at a level complementary to low energy experimental searches for the Z d . We also show how measurement of the Z d polarization (longitudinal versus transverse) can be used to distinguish the physics underlying these rare decays.

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Unravelling an extended quark sector through multiple Higgs production?

Cited by 90 publications

References 90 publications

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

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

Survey of vector-like fermion extensions of the Standard Model and their phenomenological implications

Higgs decays as a window into the dark sector

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