Minimal universal extra dimensions in<tt>CalcHEP/CompHEP</tt>

Datta, AseshKrishna; Kong, Kyoungchul; Matchev, K.

doi:10.1088/1367-2630/12/7/075017

Cited by 51 publications

(74 citation statements)

References 111 publications

(120 reference statements)

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“…The masses of the first Kaluza-Klein excitations are computed via one-loop calculations [172,192], and for α s (M Z ) = 0.1172, the spectrum agrees with the one given in [192,193]. We obtain for the excitations of the quarks at √ s = 1400 GeV, …”

Section: B5 Extra Dimensional Modelssupporting

confidence: 68%

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A comprehensive approach to new physics simulations

et al. 2011

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We describe a framework to develop, implement and validate any perturbative Lagrangian-based particle physics model for further theoretical, phenomenological and experimental studies. The starting point is FEYNRULES, a MATHEMATICA package that allows to generate Feynman rules for any Lagrangian and then, through dedicated interfaces, automatically pass the corresponding relevant information to any supported Monte Carlo event generator. We prove the power, robustness and flexibility of this approach by presenting a few examples of new physics models (the Hidden Abelian Higgs Model, the general Two-Higgs-Doublet Model, the most general Minimal Supersymmetric Standard Model, the Minimal Higgsless Model, Universal and Large Extra Dimensions, and QCD-inspired effective Lagrangians) and their implementation/validation in FEYNARTS/FORMCALC, CALCHEP, MADGRAPH/MADEVENT, and SHERPA.

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Section: B5 Extra Dimensional Modelssupporting

confidence: 68%

“…Unlike LED models, in UED models all fields have access to the extra dimension and depend on the fifth coordinate y. We split the most general Lagrangian in four pieces [164,172],…”

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confidence: 99%

A comprehensive approach to new physics simulations

et al. 2011

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“…2 We thank Kohsaku Tobioka for bringing this work to our attention. accessible to experimentalists: Datta et al [17] implemented mUED in CompHEP [18,19]/CalcHEP [20,21] and independent implementations [15,16] have improved upon this by treating electroweak symmetry breaking consistently.…”

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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“…Applying all the assumptions mentioned above to the MSSM and MUED processes listed in Table 3, we can obtain the full list of non-zero ECC couplings for the processes [12,96]: for the s-channel couplings…”

Section: Observablesmentioning

confidence: 99%

Spin and chirality effects in antler-topology processes at high energy $$\varvec{e^+e^-}$$ colliders

et al. 2015

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We perform a model-independent investigation of spin and chirality correlation effects in the antler-topology processes e + e − → P + P − → ( + D 0 )( −D0 ) at highenergy e + e − colliders with polarized beams. Generally the production process e + e − → P + P − can occur not only through the s-channel exchange of vector bosons, V 0 , including the neutral Standard Model (SM) gauge bosons, γ and Z , but also through the s-and t-channel exchanges of new neutral states, S 0 and T 0 , and the u-channel exchange of new doubly charged states, U −− . The general set of (nonchiral) three-point couplings of the new particles and leptons allowed in a renormalizable quantum field theory is considered. The general spin and chirality analysis is based on the threshold behavior of the excitation curves for P + P − pair production in e + e − collisions with longitudinal-and transverse-polarized beams, the angular distributions in the production process and also the production-decay angular correlations. In the first step, we present the observables in the helicity formalism. Subsequently, we show how a set of observables can be designed for determining the spins and chiral structures of the new particles without any model assumptions. Finally, taking into account a typical set of approximately chiral invariant scenarios, we demonstrate how the spin and chirality effects can be probed experimentally at a high-energy e + e − collider.

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Minimal universal extra dimensions in`CalcHEP/CompHEP`

Cited by 51 publications

References 111 publications

A comprehensive approach to new physics simulations

A comprehensive approach to new physics simulations

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

Spin and chirality effects in antler-topology processes at high energy $$\varvec{e^+e^-}$$ colliders

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Minimal universal extra dimensions inCalcHEP/CompHEP

Cited by 51 publications

References 111 publications

A comprehensive approach to new physics simulations

A comprehensive approach to new physics simulations

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

Spin and chirality effects in antler-topology processes at high energy $$\varvec{e^+e^-}$$ colliders

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Minimal universal extra dimensions in`CalcHEP/CompHEP`