Quantum Critical Higgs: from AdS5 to colliders

Shirazi, Ali Shayegan; Terning, John

doi:10.1007/jhep02(2020)026

Cited by 2 publications

(3 citation statements)

References 62 publications

(107 reference statements)

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“…To illustrate the effects described in the previous section, we first discuss the partonic cross-section qq → G * → tt for q = t. 13…”

Section: Top-quark Pair Production At the Lhcmentioning

confidence: 99%

“…As an attempt to explain the above lack of experimental evidence, theories where the KK gluons constitute a continuum above a mass gap, instead of isolated resonances, have recently been proposed [3][4][5][6][7][8][9][10][11][12][13][14], as well as unparticle models [15]. In this work, though, we want to explore a more conventional solution: the case of broad KK gluons, with mass M and total width Γ.…”

Section: Introductionmentioning

confidence: 99%

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On broad Kaluza-Klein gluons

Escribano

Mendizabal

Quirós

et al. 2021

J. High Energ. Phys.

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In theories with a warped extra dimension, composite fermions, as e.g. the right-handed top quark, can be very strongly coupled to Kaluza-Klein (KK) fields. In particular, the KK gluons in the presence of such composite fields become very broad resonances, thus remarkably modifying their experimental signatures. We have computed the pole mass and the pole width of the KK gluon, triggered by its interaction with quarks, as well as the prediction for proton-proton cross-sections using the full propagator and compared it with that obtained from the usual Breit-Wigner approximation. We compare both approaches, along with the existing experimental data from ATLAS and CMS, for the $$ t\overline{t} $$ t t ¯ , $$ t\overline{t}W $$ t t ¯ W , $$ t\overline{t}Z $$ t t ¯ Z , $$ t\overline{t}H $$ t t ¯ H , and $$ tt\overline{tt} $$ tt tt ¯ channels. We have found differences between the two approaches of up to about 100%, highlighting that the effect of broad resonances can be dramatic on present, and mainly future, experimental searches. The channel $$ tt\overline{tt} $$ tt tt ¯ is particularly promising because the size of the cross-section signal is of the same order of magnitude as the Standard Model prediction, and future experimental analyses in this channel, especially for broad resonances, can shed light on the nature of possible physics beyond the Standard Model.

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“…To illustrate the effects described in the previous section, we first discuss the partonic cross-section qq → G * → tt for q = t. 13…”

Section: Top-quark Pair Production At the Lhcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On broad Kaluza-Klein gluons

Escribano

Mendizabal

Quirós

et al. 2021

J. High Energ. Phys.

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show abstract

“…the Higgs, are themselves part of the conformal sector [10,11]. The basic signature is a continuum of particles; more or less like a spectrum of particle masses too closely spaced to be individually resolved [12,13,14,15,16,17]. For the SM particles-or their supersymmetric partners-to be unparticles, the conformal sector should be broken at nottoo-low an energy.…”

Section: Introductionmentioning

confidence: 99%

Collider phenomenology of a gluino continuum

Gao

Shirazi

Terning

2020

J. High Energ. Phys.

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Continuum supersymmetry is a class of models in which the supersymmetric partners together with part of the standard model come from a conformal sector, broken in the IR near the TeV scale. Such models not only open new doors for addressing the problems of the standard model, but also have unique signatures at hadron colliders, which might explain why we have not yet seen any superpartners at the LHC. Here we use gauge-gravity duality to model the conformal sector, generate collider simulations, and finally analyze continuum gluino signatures at the LHC. Due to the increase in the number of jets produced the bounds are weaker than for the minimal supersymmetric standard model with the same gluino mass threshold. * yanggao@fnal.gov, †

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Quantum Critical Higgs: from AdS5 to colliders

Cited by 2 publications

References 62 publications

On broad Kaluza-Klein gluons

On broad Kaluza-Klein gluons

Collider phenomenology of a gluino continuum

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