Search for the fourth family up quarks at CERN LHC

Arık, E.; Atağ, S.; Aydin, Z. Z.; Çelikel, A.; Cicek, Z.; Çiftçi, A. K.; Mailov, A.; Sultansoy, S.; Ünel, G.

doi:10.1103/physrevd.58.117701

Cited by 33 publications

(29 citation statements)

References 16 publications

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“…The fourth SM family quarks will be copiously produced at the LHC [12][13] if their masses are less than 1 TeV. The FNAL Tevatron Run II can observe u₄ and d₄ before the LHC if there is anomalous interaction with enough strength between the fourth family quarks and known quarks [14].…”

Section: Introductionmentioning

confidence: 99%

Fourth standard model family neutrino at future linear colliders

Çiftçi

Sultansoy

2005

Phys. Rev. D

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It is known that Flavor Democracy favors the existence of the fourth standard model (SM) family. In order to give nonzero masses for the first three family fermions Flavor Democracy has to be slightly broken. A parametrization for democracy breaking, which gives the correct values for fundamental fermion masses and, at the same time, predicts quark and lepton CKM matrices in a good agreement with the experimental data, is proposed. N 1 )→ µ ± W ∓ ) provide cleanest signature at e⁺e⁻ colliders. Meanwhile, in our parametrization this channel is dominant. W bosons produced in decays of the fourth family neutrinos will be seen in detector as either di-jets or isolated leptons. As an example we consider the production of 200 GeV mass fourth family neutrinos at GeV 500 s = linear colliders by taking into account di-muon plus four-jet events as signatures.

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Section: Introductionmentioning

confidence: 99%

Fourth standard model family neutrino at future linear colliders

Çiftçi

Sultansoy

2005

Phys. Rev. D

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“…The best channel for observing it will be [5]: u 4 u 4 → W W bb → (lν)(jj)(bb), where one W decays leptonically and the other hadronically. The mass resolution is estimated to be 20(40) GeV for m u 4 = 320(640) GeV.…”

Section: Introductionmentioning

confidence: 99%

“…The multi-hundreds GeV fourth generation up-type quark (u 4 ), if exist, will be produced at the CERN Large Hadron Collider (LHC) [3,4] via gluon-gluon fusion [4]. Hence, the observation of the fourth SM family quark in ATLAS has been considered in [4,5]. It is expected that the masses of the fourth family quarks lies between 300 ≤ m u 4 ≤ 700 GeV with preferable value m u 4 = 4gwη = 8m w ∼ = 640…”

Section: Introductionmentioning

confidence: 99%

Bound Energy Masses of Mesons Containing the Fourth Generation and Iso-Singlet Quarks

Ikhdair

Sever

2006

Int. J. Mod. Phys. A

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The fourth Standard Model (SM) family quarks and weak iso-singlet quarks predicted by E 6 GUT are considered. The spin-average of the pseudoscalar η 4 (n 1 S 0 ) and vector ψ 4 (n 3 S 1 ) quarkonium binding masses of the new mesons formed by the fourth Standard Model (SM) family and iso-singlet E 6 with their mixings to ordinary quarks are investigated. Further, the fine and hyperfine mass splittings of the these states are also calculated. We solved the Schrödinger equation with logarithmic and Martin potentials using the Shifted large-N expansion technique. Our results are compared with other models to gauge the reliability of the predictions and point out differences.

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“…It is instructive, at this stage, to consider t ′ (b ′ ) signals at the Tevatron and the LHC [61][62][63][64][65][66][67].…”

Section: Lhc Signalsmentioning

confidence: 99%

A fourth generation, anomalous like-sign dimuon charge asymmetry and the LHC

Choudhury

Ghosh²

2011

J. High Energ. Phys.

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A fourth chiral generation, with m t ′ in the range ∼ (300−500) GeV and a moderate value of the CP-violating phase can explain the anomalous like-sign dimuon charge asymmetry observed recently by the D0 collaboration. The required parameters are found to be consistent with constraints from other B and K decays. The presence of such quarks, apart from being detectable in the early stages of the LHC, would also have important consequences in the electroweak symmetry breaking sector.

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Search for the fourth family up quarks at CERN LHC

Cited by 33 publications

References 16 publications

Fourth standard model family neutrino at future linear colliders

Fourth standard model family neutrino at future linear colliders

Bound Energy Masses of Mesons Containing the Fourth Generation and Iso-Singlet Quarks

A fourth generation, anomalous like-sign dimuon charge asymmetry and the LHC

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