Bilepton production at hadron colliders

Dion, B.; Gregoire, Thomas; London, David; Marleau, Luc; Nadeau, Hélène

doi:10.1103/physrevd.59.075006

Cited by 102 publications

(99 citation statements)

References 23 publications

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“…Another striking feature of models with complex isospin-triplets, such as the GM model, the left-right symmetric model, the littlest Higgs model, and some models motivated by neutrino masses, is the appearance of doublycharged states H ±± . At hadron colliders, such doubly-charged Higgs bosons are studied via the pair production mechanism [10,32,33] as well as the single production mechanism [33,34] and the W -boson fusion mechanism [6,35]. They can also be investigated at the ILC and its e − e − , e − γ and γγ option in various scenarios [36].…”

Section: Georgi-machacek Modelmentioning

confidence: 99%

Unitarity bounds in the Higgs model including triplet fields with custodial symmetry

Aoki

Kanemura

2008

Phys. Rev. D

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We study bounds on Higgs boson masses from perturbative unitarity in the Georgi-Machacek model, whose Higgs sector is composed of a scalar isospin doublet, a real and a complex isospin triplet fields. This model can be compatible with the electroweak precision data without fine tuning because of the imposed global SU (2) R symmetry in the Higgs potential, by which the electroweak rho parameter is unity at the tree level. All possible two-body elastic-scattering channels are taken into account to evaluate the S-wave amplitude matrix, and then the condition of perturbative unitarity is imposed on the eigenvalues to obtain constraint on the Higgs parameters. Masses of all scalar bosons turn out to be bounded from above, some of which receive more strict upper bounds as compared to that in the standard model (712 GeV). In particular, the upper bound of the lightest scalar boson, whatever it would be, is about 270 GeV.

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Section: Georgi-machacek Modelmentioning

confidence: 99%

Unitarity bounds in the Higgs model including triplet fields with custodial symmetry

Aoki

Kanemura

2008

Phys. Rev. D

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“…In the case of the double-charged scalar-bilepton, CDF and DØ establish the lower bound for the bilepton mass in the range 110 − 150 GeV [15,16,17,18] with 95% C.L., from the exclusive bilepton decay into left-handed eτ , µ τ and µ µ pairs by considering the left-right model, the SM with a Higgs triplet and the little Higgs model. The study of vector-bilepton pair production from the hadron collider cannot be completely model independent because the SM Drell-Yan process violates unitarity, then requiring extra s− and t−channel contributions from new neutral gauge boson and from exotic fermions [19]. Having this in mind and in order to focus the LHC physics, we do elect a model to get correct unitarity behavior for bilepton pair production in a p p collider.…”

Section: Introductionmentioning

confidence: 99%

Vector- and scalar-bilepton pair production in hadron colliders

Barreto¹,

Coutinho²,

Borges³

2011

Phys. Rev. D

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We study the double-charged vector-bilepton pair production and double-charged scalar-bilepton pair production via+ X, where Y and S 1 are vector and scalar bileptons respectively, in the framework of the minimal version of the 3-3-1 model. We compute the photon, Z, and Z ′ s-channel contributions for the elementary process of bilepton scalar pair production, and to keep the correct unitarity behavior for the elementary qq interaction, we include the exotic quark t-channel contribution in the vector-bilepton pair production calculation. We explore a mass range for Z ′ and we fix the exotic quark mass within the experimental bounds. In this model, the vector-bilepton mass is directly related to M Z ′ and we consider scalar mass values around the vector-bilepton mass.We show that the total cross section for vector-bilepton production is 3 orders of magnitude larger than for scalar pair production for √ s = 7 TeV and 14 TeV and we obtain the number of events for the proposed LHC luminosities as a function of the bilepton mass. In addition we present some invariant mass and transverse momentum distributions. When comparing these distributions we observe quite different behavior providing the determination of the bilepton nature. We conclude that one can disentangle the production rates and that the LHC can be capable of detecting these predicted particles as a signal for new physics.

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“…This could lead to a natural explanation of the unbalancing heavy top quarks in the fermion mass hierarchy [7]. Recent analyses have indicated that signals of new particles in this model, bileptons [8] and exotic quarks [9] may be observed at the Tevatron and the Large Hadron Collider (LHC).…”

Section: Introductionmentioning

confidence: 99%

Anomalous magnetic moment of muon in 3–3–1 models

Long

Soa

2000

Physics Letters B

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A contribution from new gauge bosons in the SU(3) C ⊗SU(3) L ⊗U(1) N (3 -3 -1) models to the anomalous magnetic moments of the muon is calculated and numerically estimated. In the minimal 3 -3 -1 model, a lower bound on the bilepton mass at a value of 167 GeV is derived. For an expected precision(∼ 4 × 10 −10 ) of the BNL measurements the possible lower bounds on masses of the bileptons in the minimal version and in the version with right-handed neutrinos are around 940 GeV and 250 GeV, respectively.

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Bilepton production at hadron colliders

Cited by 102 publications

References 23 publications

Unitarity bounds in the Higgs model including triplet fields with custodial symmetry

Unitarity bounds in the Higgs model including triplet fields with custodial symmetry

Vector- and scalar-bilepton pair production in hadron colliders

Anomalous magnetic moment of muon in 3–3–1 models

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