Exotic heavy leptons predicted by extended models at the CERN LHC

Montalvo, J. E. Cieza; Filho, P. P. de Queiroz

doi:10.1103/physrevd.66.055003

Cited by 8 publications

(6 citation statements)

References 25 publications

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“…For vectorlike fermions via the gluon fusion mechanism, both single production [5] and pair production [3,4,6] are possible. Because single production has a larger rate than pair production, we consider heavy lepton single production in this work.…”

Section: Single Production Of Exotic Leptons In Vectorlike Ex-tenmentioning

confidence: 99%

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Productions of heavy charged leptons via gluon fusion at the LHC: A revisit

Liu

Yang

2010

Phys. Rev. D

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Heavy charged lepton productions via gluon fusion at the LHC are revisited. Full loop calculations are adopted with an updated parton distribution function and electroweak data. Including contribution from new generation quarks in the loop, pair production of the sequential heavy lepton via gluon fusion at the LHC dominates over that via the Drell-Yan mechanism in some heavy lepton mass range. Exotic lepton single production of vectorlike lepton extended models is also calculated. In the later case, the gluon fusion mechanism via the Higgs exchange is emphasized.Our numerical results for both pair and single production of heavy leptons are smaller than previous studies especially for a large heavy lepton mass as a result of full loop calculation and due to the mixing angles.

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Section: Single Production Of Exotic Leptons In Vectorlike Ex-tenmentioning

confidence: 99%

“…This was also studied in refs. [3][4][5][6][7][8]. In an effort of understanding the Higgs, an extra vectorlike generation of matter is introduced within the framework of supersymmetry [9].…”

Section: Introductionmentioning

confidence: 99%

Productions of heavy charged leptons via gluon fusion at the LHC: A revisit

Liu

Yang

2010

Phys. Rev. D

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“…Within the context of the electroweak (EW) gauge symmetry group of the SM, one approach is to include new quarks fields forming vector-like doublets in such a way to evade the problem of having a strong coupling with the Higgs boson. Previous studies show that quarks from these vector-like doublets can be discovered with collisions at the TeV energy scale [18][19][20][21][22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

A model with chiral quarks of electric charges −4/3 and 5/3

Alves

Barreto

Camargo

et al. 2013

J. High Energ. Phys.

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We present a new model based on the SU (3) ⊗ SU (2) ⊗ U (1) symmetry, in which there is a new consistent set of chiral fermion fields that renders the model free from anomalies. The new fermions do not share the usual family structure of the Standard Model and some of them have exotic electric charges, as the quarks X and Y with electric charge 5/3 and −4/3, respectively. Interestingly, the model contains a new heavy neutral lepton which may be a dark matter candidate. Two Higgs doublets are present in our construction, so that two CP even scalars are present in the model particle spectrum. One of them is similar to the Standard Model Higgs boson, while the other one couples mainly with the new exotic fermions. We performed a discovery analysis showing that the 8 TeV LHC can find the Y quark from single and pair production with masses from 300 GeV up to ∼ 750 GeV. We also show that the new spectrum does not contribute significantly to the oblique EW parameters, and that dangerous flavor changing neutral currents are suppressed. Characteristic signatures from the other new fermions in the model are also commented.

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“…In the search for extensions of the SM the new heavy leptons play an important role. Many analysis have been done for the production of heavy leptons at future e − e + [2,3,4,5], at hadron [6,7,8] and also at ep colliders [9,10]. The experimental upper bounds for the heavy lepton masses were found to be 44 GeV by OPAL [11], 46 GeV by ALEPH [12] and 90 GeV by H1 [13] Collaborations.…”

Section: Introductionmentioning

confidence: 99%

SINGLE AND PAIR PRODUCTION OF HEAVY LEPTONS IN E₆ MODEL

2006

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We investigate the single and pair production of new heavy leptons via string inspired E 6 model at future linear colliders. Signal and corresponding backgrounds for these leptons are studied. We have found that single production of heavy leptons is more relevant than that of pair production, as expected. For a maximal mixing value of 0.1, the upper mass limits of 2750 GeV in the single case and 1250 GeV in the pair production case are obtained at √ s = 3 TeV collider option.

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Exotic heavy leptons predicted by extended models at the CERN LHC

Cited by 8 publications

References 25 publications

Productions of heavy charged leptons via gluon fusion at the LHC: A revisit

Productions of heavy charged leptons via gluon fusion at the LHC: A revisit

A model with chiral quarks of electric charges −4/3 and 5/3

SINGLE AND PAIR PRODUCTION OF HEAVY LEPTONS IN E₆ MODEL

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Exotic heavy leptons predicted by extended models at the CERN LHC

Cited by 8 publications

References 25 publications

Productions of heavy charged leptons via gluon fusion at the LHC: A revisit

Productions of heavy charged leptons via gluon fusion at the LHC: A revisit

A model with chiral quarks of electric charges −4/3 and 5/3

SINGLE AND PAIR PRODUCTION OF HEAVY LEPTONS IN E6 MODEL

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SINGLE AND PAIR PRODUCTION OF HEAVY LEPTONS IN E₆ MODEL