Higgs Bosons from Two-Gluon Annihilation in Proton-Proton Collisions

Georgi, Howard; Glashow, Sheldon L.; Macháček, M.; Nanopoulos, Dimitri V.

doi:10.1103/physrevlett.40.692

Cited by 673 publications

(562 citation statements)

References 12 publications

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“…In the area below the dotted line the Higgs production cross section [26][27][28][29][30] in association with different numbers of jets [31] is large enough to be accessed experimentally for a luminosity of 50 fb −1 .…”

Section: Boundsmentioning

confidence: 99%

LHC: Standard Higgs and hidden Higgs

Englert¹,

Plehn²,

Rauch³

et al. 2012

Physics Letters B

101

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Interpretations of Higgs searches critically involve production cross sections and decay probabilities for different analysis channels. Mixing effects can reduce production rates, while invisible decays can reduce decay probabilities. Both effects may transparently be quantified in Higgs systems where a visible Higgs boson is mixed with a hidden sector Higgs boson. Recent experimental exclusion bounds can be re-interpreted in this context as a sign for non-standard Higgs properties. Should a light Higgs boson be discovered, then our analysis will quantify how closely it may coincide with the Standard Model. [5, 6], so that each experiment alone has about the same sensitivity as the combination in the low mass region, raising the low-mass bound of the Higgs from the LEP2 limit [7] of 114.4 GeV to 115.5/115 GeV and leading to an exclusion of the mass from 131 GeV/127 GeV to 453 GeV/600 GeV by ATLAS/CMS, respectively. Bounds as low as fractions R ≤ 0.3 have been set on the production cross sections with respect to the Standard Model [SM] for some of the masses probed. Given the far reaching consequences, the question arises naturally to what extent Higgs bosons, in slightly generalized scenarios, may still exist in this mass region.On the other hand, a gap from about 130 GeV down to the low-mass limit of about 115 GeV is left, presently, in which a SM-type Higgs signal can be expected to either rise up or plunge in the near future [5, 6]. When a Higgs boson will indeed be discovered in this mass range, the standard-hidden Higgs scenario allows to quantify how well the global properties of the particle coincide with the predictions of the Standard Model.Both these questions have been addressed [8,9] at the theoretical level in a standard-hidden Higgs scenario. The present sequel will include the recent LHC results on the Higgs sector in the analysis. The ground for the fundamental idea to use the Higgs boson as a portal to a novel hidden sector in nature has been laid for general model structures in Ref. [11]. Phenomenological implications [12] can then be studied in specific frameworks like hidden valleys [13]. Other than the Higgs portal there exist two additional portal-type interactions in a renormalizable theory, namely kinetic U (1) mixing [14] and mixing with sterile neutrinos [15].The experimentally observed rates depend on the Higgs production cross sections and the decay branching ratios [16]. In scenarios in which the standard Higgs boson is mixed with another Higgs boson, originating from a hidden sector for instance, the production cross sections are reduced universally by the mixing parameter and, in addition, the visible branching ratios may be lowered by decays into invisible channels induced by mixing. Throughout this paper we will consider the minimal Standard Model Higgs sector as the activator of the visible Higgs boson [17], but the same arguments trivially hold for extended visible Higgs sectors, for example in supersymmetry or other extensions to the Standard Model [18]. In the early theoret...

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Section: Boundsmentioning

confidence: 99%

LHC: Standard Higgs and hidden Higgs

Englert¹,

Plehn²,

Rauch³

et al. 2012

Physics Letters B

101

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“…The gluon-gluon fusion process, gg → h [37], is a copious production mechanism mediated by the same loops that contribute to h → gg described above. In the narrow width approximation, the partonic production cross section may be related to the decay width at leading order by the expression…”

Section: Hadron Collider Phenomenologymentioning

confidence: 99%

Higgs boson decay into hadronic jets

et al. 2002

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“…At the Tevatron, the two main search channels for the SM Higgs boson are the top and bottom quark loops mediated gluon-gluon fusion mechanism gg → H [21] with the Higgs decaying into W W pairs which lead to ℓνℓν (with ℓ = e, µ) final states [22] and the Higgs-strahlung processes qq → V H (with V = W, Z) [23] with the subsequent H → bb and V → ℓ + X decays of the Higgs and the associated gauge bosons. Analyses performed by the CDF and D0 experiments, under some assumptions for the production cross sections and their associated uncertainties, have recently excluded the Higgs mass range M H = 158-175 GeV at the 95% confidence level (CL) [14,15].…”

Section: Jhep03(2011)055mentioning

confidence: 99%

Higgs production at the lHC

Baglio

Djouadi

2011

J. High Energ. Phys.

172

194

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Abstract:We analyze the production of Higgs particles at the early stage of the CERN large Hadron Collider with a 7 TeV center of mass energy (lHC). We first consider the case of the Standard Model Higgs boson that is mainly produced in the gluon-gluon fusion channel and to be detected in its decays into electroweak gauge bosons, gg → H → W W, ZZ, γγ. The production cross sections at √ s = 7 TeV and the decay branching ratios, including all relevant higher order QCD and electroweak corrections, are evaluated. An emphasis is put on the various theoretical uncertainties that affect the production rates: the significant uncertainties from scale variation and from the parametrization of the parton distribution functions as well as the uncertainties which arise due to the use of an effective field theory in the calculation of the next-to-next-to-leading order corrections. The parametric uncertainties stemming from the values of the strong coupling constant and the heavy quark masses in the Higgs decay branching ratios, which turn out to be non-negligible, are also discussed. The implications for different center of mass energies of the proton collider, √ s = 8-10 TeV as well as for the design energy √ s = 14 TeV, are briefly summarized. We then discuss the production of the neutral Higgs particles of the Minimal Supersymmetric extension of the Standard Model in the two main channels: gluon-gluon and bottom quark fusion leading to Higgs bosons which subsequently decay into tau lepton or b-quark pairs, gg, bb → Higgs → τ + τ − , bb. The Higgs production cross sections at the lHC and the decay branching ratios are analyzed. The associated theoretical uncertainties are found to be rather large and will have a significant impact on the parameter space of the model that can be probed.

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Higgs Bosons from Two-Gluon Annihilation in Proton-Proton Collisions

Cited by 673 publications

References 12 publications

LHC: Standard Higgs and hidden Higgs

LHC: Standard Higgs and hidden Higgs

Higgs boson decay into hadronic jets

Higgs production at the lHC

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