Collider implications of Kaluza-Klein excitations of the gluons

Dicus, Duane A.; McMullen, C. D.; Nandi, S.

doi:10.1103/physrevd.65.076007

Cited by 64 publications

(87 citation statements)

References 66 publications

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“…In the unitary gauge, i.e. ξ → ∞, the 5D-QCD Feynman rules reduce to those presented in [23]. The factors δ k,l,m ,δ l,k,m , δ k,l,m,n andδ k,n,l,m imply selection rules for the triple and quartic coupling of the KK modes A a (n)µ and A a (n)5 , which are typical for the interactions between bulk fields.…”

Section: Higher-dimensional Non-abelian Theorymentioning

confidence: 99%

Minimal higher-dimensional extensions of the standard model and electroweak observables

2002

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We consider minimal 5-dimensional extensions of the Standard Model compactified on an S 1 /Z 2 orbifold, in which the SU(2) L and U(1) Y gauge fields and Higgs bosons may or may not all propagate in the fifth dimension while the observable matter is always assumed to be confined to a 4-dimensional subspace. We pay particular attention to consistently quantize the higher-dimensional models in the generalized R ξ gauge and derive analytic expressions for the mass spectrum of the resulting Kaluza-Klein states and their couplings to matter. Based on recent data from electroweak precision tests, we improve previous limits obtained in the 5-dimensional Standard Model with a common compactification radius and extend our analysis to other possible 5-dimensional Standard-Model constructions. We find that the usually derived lower bound of ∼ 4 TeV on an universal compactification scale may be considerably relaxed to ∼ 3 TeV in a minimal scenario, in which the SU(2) L gauge boson is the only field that feels the presence of the fifth dimension.

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Section: Higher-dimensional Non-abelian Theorymentioning

confidence: 99%

Minimal higher-dimensional extensions of the standard model and electroweak observables

2002

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“…Flavor non-universal scenarios appear in the case of the topgluon where the third generation quarks are assigned to one SU (3) group and the light quarks to the other [5,6], and the newer axigluon models where different chiralities of the same quark can be charged under different groups [7][8][9][10][11][12]. Other examples of color-octet vector bosons include Kaluza-Klein (KK) gluons which are excited gluons in extra-dimensional models [13], technirhos which are composite colored vector mesons found in technicolor [14][15][16] models that include colored technifermions, and low-scale string resonances [17].…”

Section: Introductionmentioning

confidence: 99%

Distinguishing flavor nonuniversal colorons fromZ′bosons at the LHC

Chivukula¹,

Ittisamai²,

Simmons³

2015

Phys. Rev. D

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Electrically-neutral massive color-singlet and color-octet vector bosons, which are often predicted in theories beyond the Standard Model, have the potential to be discovered as dijet resonances at the LHC. A color-singlet resonance that has leptophobic couplings needs further investigation to be distinguished from a color-octet one. In previous work, we introduced a method for discriminating between the two kinds of resonances when their couplings are flavor-universal, using measurements of the dijet resonance mass, total decay width and production cross-section. Here, we describe an extension of that method to cover a more general scenario, in which the vector resonances could have flavor non-universal couplings; essentially, we incorporate measurements of the heavy-flavor decays of the resonance into the method. We present our analysis in a model-independent manner for a dijet resonance with mass 2.5 − 6.0 TeV at the LHC with √ s = 14 TeV and integrated luminosities of 30, 100, 300 and 1000 fb −1 , and show that the measurements of the heavy-flavor decays should allow conclusive identification of the vector boson. Note that our method is generally applicable even for a Z boson with non-Standard invisible decays. We include an appendix of results for various resonance couplings and masses to illustrate how well each observable must be measured to distinguish colorons

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“…Having defined the appropriate R ξ gauge through the gauge-fixing term in (14), we can recover the usual unitary gauge, in which the Goldstone modes decouple from the theory, in the limit ξ → ∞ [20,21]. Thus, for the case at hand, we have seen how starting from a non-covariant higher-dimensional gauge-fixing condition, we can arrive at the known covariant 4-dimensional R ξ gauge after compactification.…”

Section: -Dimensional Abelian Modelsmentioning

confidence: 99%

An Introduction to 5-Dimensional Extensions of the Standard Model

Mueck

Pilaftsis

Rueckl

2004

Heavy Quark Physics

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Abstract. We give a pedagogical introduction to the physics of large extra dimensions. We focus our discussion on minimal extensions of the Standard Model in which gauge fields may propagate in a single, compact extra dimension while the fermions are restricted to a 4-dimensional Minkowski subspace. First, the basic ideas, including an appropriate gauge-fixing procedure in the higher-dimensional context, are illustrated in simple toy models. Then, we outline how the presented techniques can be extended to more realistic theories. Finally, we investigate the phenomenology of different minimal Standard Model extensions, in which all or only some of the SU(2)L and U(1)Y gauge fields and Higgs bosons feel the presence of the fifth dimension. Bounds on the compactification scale between 4 and 6 TeV, depending on the model, are established by analyzing existing data.

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Collider implications of Kaluza-Klein excitations of the gluons

Cited by 64 publications

References 66 publications

Minimal higher-dimensional extensions of the standard model and electroweak observables

Minimal higher-dimensional extensions of the standard model and electroweak observables

Distinguishing flavor nonuniversal colorons fromZ′bosons at the LHC

An Introduction to 5-Dimensional Extensions of the Standard Model

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