Prospects for the discovery of 4th family quarks with the ATLAS detector

Özcan, V. E.; Sultansoy, S.; Ünel, G.

doi:10.1140/epjc/s10052-008-0766-4

Cited by 29 publications

(21 citation statements)

References 18 publications

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“…Regarding the b ′ quark, for m b ′ > m t + M W the decay b ′ → W − t would dominate, distinguishing this quark from a B singlet in either model. The discovery potential for fourth generation quarks [61,62] is similar to the models studied here.…”

Section: Jhep11(2009)030supporting

confidence: 63%

Elastic Properties of Lithium Germanate Glasses Studied by Brillouin Scattering

Kaneda¹,

Matsuda²,

Kojima³

2010

Jpn. J. Appl. Phys.

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We systematically study the possible signals at LHC of new vector-like quarks mainly coupled to the third generation. We consider heavy quarks T , B, X, Y of charges 2/3, −1/3, 5/3 and −4/3, respectively, in SU(2) L isosinglets T L,R , B L,R , or isodoublets (T B) L,R , (X T ) L,R or (B Y ) L,R . Analyses based on a fast detector simulation are presented for twelve different final states containing one, two, three or four charged leptons in several invariant mass regions, also considering various b quark multiplicities. It is shown that with the combination of the different channels the new quarks can be identified and their charged and neutral decays established. The comparison among final states also shows that the single lepton one offers the best discovery potential at LHC. For heavy quark masses of 500 GeV, the 5σ discovery luminosities range from 0.16 fb −1 for a (X T ) L,R doublet to 1.9 fb −1 for a B L,R singlet.

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Section: Jhep11(2009)030supporting

confidence: 63%

Elastic Properties of Lithium Germanate Glasses Studied by Brillouin Scattering

Kaneda¹,

Matsuda²,

Kojima³

2010

Jpn. J. Appl. Phys.

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“…For the PI parametrization we assume the constant values jV Q 0 q j ¼ jV qQ 0 j ¼ 0:01, PII contains a dynamical parametrization jV q i Q 0 j ¼ jV Q 0 q j j % 4Àn with a preferred value of ¼ 0:1, and the PIII parametrization assumes maximal mixings jV t 0 d j ' 0:063, jV t 0 s j ' 0:46, jV t 0 b j ' 0:47, jV ub 0 j ' 0:044, jV cb 0 j ' 0:46, jV tb 0 j ' 0:47, given by Ref. [24], corresponding to the case of one sigma deviation from the mean values of jV Q 0 i j 2 and jV iQ 0 j 2 . The flavor changing neutral current interactions are known to be absent at tree level in the SM.…”

Section: Fourth-family Quark Interactionsmentioning

confidence: 99%

Anomalous resonant production of the fourth-family up-type quarks at the LHC

et al. 2009

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Considering the present limits on their masses from the Tevatron experiments, the fourth-family quarks are expected to have masses larger than the top quark. Because of their expected large masses, they could have different dynamics than the third-family quarks of the standard model. The resonant production of the fourth-family up-type quark t 0 has been studied via the anomalous production subprocess gq i ! t 0 (where q i ¼ u, c) at the LHC, with center-of-mass energies of 10 TeV and 14 TeV. The signatures of such a process are discussed within the standard model decay modes. The sensitivity to the anomalous coupling =Ã ¼ 0:1 TeV À1 can be reached at ffiffi ffi s p ¼ 10 TeV and L int ¼ 100 pb À1 .

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“…Moreover, we can expect a crucial addition from anomalous interactions for production of fourth family quarks. These interactions have been investigated at lepton colliders at lepton colliders [30,31], γe colliders [32], ep colliders [10,[33][34][35], and hadron colliders [8,28,[36][37][38][39][40][41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%