New Hadrons Formed by the Fourth Sm Family and Iso-Singlet Quarks

Çiftçi, Hakan; Sultansoy, S.

doi:10.1142/s0217732303009423

Cited by 10 publications

(6 citation statements)

References 16 publications

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“…This type of gauge and Lorentz invariant effective Lagrangian have been proposed in the framework of composite models for interactions of excited fermions with ordinary fermions Vector Quarkonia [47,48,55] Hadrons [47] Table VI: The papers considered production of the fourth SM family fermions at existing and planned high energy colliders.…”

Section: Anomalous Decay Modesmentioning

confidence: 99%

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A Search for the Fourth SM Family: Tevatron still has a Chance

Sahin,

Sultansoy,

Turkoz

2010

Preprint

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Existence of the fourth family follows from the basics of the Standard Model and the actual mass spectrum of the third family fermions. We discuss possible manifestations of the fourth SM family at existing and future colliders. The LHC and Tevatron potentials to discover the fourth SM family have been compared. The scenario with dominance of the anomalous decay modes of the fourth family quarks has been considered in details.

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Section: Anomalous Decay Modesmentioning

confidence: 99%

“…Vector Quarkonia [46], [47] Hadrons [47] Table VII: The papers considered production of the fourth SM family fermions at existing and planned high eergy colliders (cont. )…”

Section: Anomalous Decay Modesmentioning

confidence: 99%

A Search for the Fourth SM Family: Tevatron still has a Chance

Sahin,

Sultansoy,

Turkoz

2010

Preprint

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“…The mass resolution is estimated to be 20 (40) GeV for m u4 = 300 (700) GeV. The small interfamily mixings [11,14] lead to the formation of the fourth family quarkonia [16,18]. The most promising candidate for the LHC is the pseudo-scalar quarkonium state, η 4 , which will be produced resonantly resonantly via gluon-gluon fusion.…”

Section: A Search For the Fourth Sm Familymentioning

confidence: 99%

Flavor Democracy in Particle Physics

Sultansoy

2007

AIP Conference Proceedings

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Abstract. The flavor democracy hypothesis (or, in other words, democratic mass matrix approach) was introduced in seventies taking in mind three Standard Model (SM) families. Later, this idea was disfavored by the large value of the t-quark mass. In nineties the hypothesis was revisited assuming that extra SM families exist. According to flavor democracy the fourth SM family should exist and there are serious arguments disfavoring the fifth SM family. The fourth SM family quarks lead to essential enhancement of the Higgs boson production cross-section at hadron colliders and the Tevatron can discover the Higgs boson before the LHC, if it mass is between 140 and 200 GeV. Then, one can handle "massless" Dirac neutrinos without see-saw mechanism. Concerning BSM physics, flavor democracy leads to several consequences: tanβ ≈ m t /m b ≈ 40 if there are three MSSM families; super-partner of the right-handed neutrino can be the LSP; relatively light E(6)-inspired isosinglet quark etc. Finally, flavor democracy may give opportunity to handle "massless" composite objects within preonic models.

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“…Although the masses of fourth generation quarks are larger than the top quark mass (the last analysis of the Tevatron data implies m d 4 > 372 GeV [11] and m u 4 > 358 GeV [12]), they can form bound states as a result of the smallness of the mixing between these quarks and ordinary SM quarks [13][14][15][16][17][18][19]. As the mass difference between these two quarks is small, we will refer to both members of the fourth family by u 4 .…”

Section: Introductionmentioning

confidence: 99%

Masses and decay constants of bound states containing fourth family quarks from QCD sum rules

2011

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The heavy fourth generation of quarks that have sufficiently small mixing with the three known SM families form hadrons. In the present work, we calculate the masses and decay constants of mesons containing either both quarks from the fourth generation or one from fourth family and the other from known third family SM quarks in the framework of the QCD sum rules. In the calculations, we take into account two gluon condensate diagrams as nonperturbative contributions. The obtained results reduce to the known masses and decay constants of thebb andcc quarkonia when the fourth family quark is replaced by the bottom or charm quark.

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New Hadrons Formed by the Fourth Sm Family and Iso-Singlet Quarks

Abstract: The properties of new heavy mesons containing new heavy quarks have been investigated. As an example, the fourth SM family quarks and weak iso-singlet quarks predicted by E 6 GUT are considered. Production of these hadrons at TeV energy lepton colliders have been analyzed.

Cited by 10 publications

References 16 publications

A Search for the Fourth SM Family: Tevatron still has a Chance

A Search for the Fourth SM Family: Tevatron still has a Chance

Flavor Democracy in Particle Physics

Masses and decay constants of bound states containing fourth family quarks from QCD sum rules

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