Collider phenomenology of a gluino continuum

Gao, Christina; Shirazi, Ali Shayegan; Terning, John

doi:10.1007/jhep01(2020)102

Cited by 7 publications

(3 citation statements)

References 42 publications

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“…Continuum states and related ideas have seen many applications in model building, since continuous spectra occur generically in scale-invariant theories. These include unparticles [5,6], approaches to Higgs naturalness based on compositeness or extra dimensions [7][8][9][10][11][12][13][14], and continuum supersymmetry models [15][16][17]. In the context of DM, the past few years have seen the development of models with continuum states mediating between a dark sector and the SM [18,19], as well as DM from a hidden conformal sector [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

The Continuum Dark Matter Zoo

Csáki¹,

Ismail²,

Lee³

2022

Preprint

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We generalize the recently proposed continuum dark matter model to the case where the dark matter consists of a spin-1/2 or spin-1 gapped continuum. We construct simple continuum analogs of weakly interacting massive particles annihilating through the Z portal. We discuss all existing experimental constraints, with the strongest bounds arising from indirect detection and limits on continuum decays from the cosmic microwave background. Our models are phenomenologically viable for gap scales of 60-200 GeV (spin-1/2) and 35-90 GeV (spin-1), owing to the strong kinematic suppression of direct detection bounds which is unique to continuum states. We comment on future prospects for detection and suggest directions for further continuum model building.

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Section: Introductionmentioning

confidence: 99%

The Continuum Dark Matter Zoo

Csáki¹,

Ismail²,

Lee³

2022

Preprint

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“…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%

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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“…However, it does not exclude the possibility that interesting physics are waiting to be found in rarer and more complicated final states. For example, we may have to entertain the possibility of exotic final states [2,3], where new states appear as a continuum rather than as a resonance, above backgrounds. In either case, better accuracy of background estimation is necessary.…”

Section: Introductionmentioning

confidence: 99%

Improved extrapolation methods of data-driven background estimations in high energy physics

Choi

2021

Eur. Phys. J. C

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Data-driven methods of background estimations are often used to obtain more reliable descriptions of backgrounds. In hadron collider experiments, data-driven techniques are used to estimate backgrounds due to multi-jet events, which are difficult to model accurately. In this article, we propose an improvement on one of the most widely used data-driven methods in the hadron collision environment, the “ABCD” method of extrapolation. We describe the mathematical background behind the data-driven methods and extend the idea to propose improved general methods.

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Collider phenomenology of a gluino continuum

Cited by 7 publications

References 42 publications

The Continuum Dark Matter Zoo

The Continuum Dark Matter Zoo

On broad Kaluza-Klein gluons

Improved extrapolation methods of data-driven background estimations in high energy physics

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