Search for Higgs bosons of the universal extra dimensions at the large Hadron collider

Bandyopadhyay, Priyotosh; Bhattacherjee, Biplob; Datta, AseshKrishna

doi:10.1007/jhep03(2010)048

Cited by 24 publications

(11 citation statements)

References 80 publications

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“…However due to the compressed spectrum, the NLSPs as well as the LSPs are produced mostly back to back and there is cancellation among the momenta of LSPs, which results into very low missing momenta. This a signature of nearly degenerate mass spectrum with dark matter candidate and very common in UED [33]. However, sufficient boost of the produced neutralino and chargino can give much needed momentum to their decay products.…”

Section: Sc 1: Triplino Lspmentioning

confidence: 93%

Long-lived triplinos and displaced lepton signals at the LHC

2019

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We explore the possibility of having superpartners of triplet Higgs bosons, named as 'triplinos'. They form a part of light neutralinos and charginos in a Y = 0 extended supersymmetric Standard Model. For this model such electroweakinos do not have direct couplings to the Standard Model fermions. On top of that, due to very compressed spectrum for lighter neutralinos and charginos, their decay products coming from three body decays are very soft and thus can evade the current collider bounds. These decays are particularly interesting since they give rise to displaced leptonic signatures. We categorise the parameter space, while exploring different displaced decay possibilities. A PYTHIA based simulation has been performed to find out the displaced charged lepton, jet and b-jet final states at the LHC with center of mass energy of 14 TeV.

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Section: Sc 1: Triplino Lspmentioning

confidence: 93%

Long-lived triplinos and displaced lepton signals at the LHC

2019

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“…The prospects of the mUED at the LHC and future linear colliders have been discussed in Refs. [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44] and those in the context of discrimination from other models with similar final states in Refs. [45][46][47][48][49][50].…”

Section: Introductionmentioning

confidence: 96%

Universal extra dimensions after Higgs discovery

et al. 2013

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We show bounds on five-and six-dimensional universal extra dimension (UED) models from the latest results of the Higgs searches at the LHC and from the electroweak precision data for the S and T parameters. We consider the minimal UED model in five dimensions and the ones in six dimensions, compactified on T 2 /Z 2 , T 2 /(Z 2 × Z 2 ), T 2 /Z 4 , S 2 , S 2 /Z 2 , the real projective plane, and the projective sphere. The highest possible ultraviolet cutoff scale for each UED model is evaluated from the electroweak vacuum stability by solving the renormalization group equation of the Higgs self-coupling. This scale turns out to be lower than the conventional one obtained from the perturbativity of the gauge coupling. The resultant 95% C.L. lower bounds on the first Kaluza-Klein scale from the LHC results and from the S, T analysis are 600 and 700 GeV in the minimal UED model, while those in the six-dimensional UED models are 800-1300 GeV and 900-1500 GeV, respectively.

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“…[9][10][11][12][13]), but we are only aware 2 of one experimental paper [14] that has set LHC limits on mUED. This is not surprising -the search for mUED is much more difficult than the search of SUSY within the experimentally well-explored mSUGRA scenario at the LHC.…”

Section: Introductionmentioning

confidence: 99%

Testing minimal universal extra dimensions using Higgs boson searches at the LHC

et al. 2013

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Large Hadron Collider (LHC) searches for the SM Higgs boson provide a powerful limit on models involving Universal Extra Dimensions (UED) where the Higgs production is enhanced. We have evaluated all one-loop diagrams for Higgs production gg → h and decay h → γγ within "minimal" UED (mUED), independently confirming previous results, and we have evaluated enhancement factors for Higgs boson production and decay over the mUED parameter space. Using these we have derived limits on the parameter space, combining data from both ATLAS and CMS collaborations for the most recent 7 TeV and 8 TeV LHC data. We have performed a rigorous statistical combination of several Higgs boson search channels which is important because mUED signatures from the Higgs boson are not universally enhanced.We have found that R −1 < 500 GeV is excluded at 95% CL, while for larger R −1 only a very narrow (±1−4 GeV) mass window around m h = 125 GeV and another window (up to 2 GeV wide for R −1 > 1000 GeV) around m h = 118 GeV are left. The latter is likely to be excluded as more data becomes available whereas the region around m h = 125 GeV is where the recently discovered Higgs-like particle was observed and therefore where the exclusion limit is weaker.It is worth stressing that mUED predicts an enhancement for all channels for gg → h production and decay while the vector boson fusion process W W/ZZ → h → γγ is generically suppressed and W W/ZZ → h → W W * /ZZ * is standard. Therefore, as more 8 TeV LHC data becomes available, the information on individual Higgs boson production and decay processes provided by the CMS and ATLAS experiments can be effectively used to favour mUED or exclude it further.2

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Search for Higgs bosons of the universal extra dimensions at the large Hadron collider

Cited by 24 publications

References 80 publications

Long-lived triplinos and displaced lepton signals at the LHC

Long-lived triplinos and displaced lepton signals at the LHC

Universal extra dimensions after Higgs discovery

Testing minimal universal extra dimensions using Higgs boson searches at the LHC

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