Universal extra-dimensional models with boundary localized kinetic terms: Probing at the LHC

Datta, Anindya; Dey, Ujjal Kumar; Shaw, Avirup; Raychaudhuri, Amitava

doi:10.1103/physrevd.87.076002

Cited by 31 publications

(40 citation statements)

References 49 publications

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“…However, in general one can adopt asymmetric boundary terms leading to non-conservation of KK-parity. Phenomenology of such KK-parity-non-conserving scenario can be found in [14,21].…”

Section: A Lightning Review Of Kk-parity-conserving Nmued Scenariomentioning

confidence: 99%

“…In 5-dimensions four component Dirac spinors Ψ L (x, y) and Ψ R (x, y) can be written in terms of two component spinors [12,14]:…”

Section: A Lightning Review Of Kk-parity-conserving Nmued Scenariomentioning

confidence: 99%

“…A very special assumption is being taken in minimal UED (mUED) which ensures vanishing radiative corrections at the scale Λ. In a more general scenario like non-minimal UED (nmUED) [8]- [14], this special assumption is being avoided. Instead, one assumes the boundary localised corrections as free parameters of the model.…”

Section: Introductionmentioning

confidence: 99%

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Nonminimal universal extra dimensional model confrontsBs→μ+μ−

2016

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Addition of boundary localised kinetic and Yukawa terms to the action of a 5-dimensional Standard Model would non-trivially modify the Kaluza-Klein spectra and some of the interactions among the Kaluza-Klein excitations compared to the minimal version of this model, in which, these boundary terms are not present. In the minimal version of this framework known as Universal Extra Dimensional model, special assumptions are made about these unknown, beyond the cut-off contributions to restrict the number of unknown parameters of the theory to a minimal. We estimate the contribution of Kaluza-Klein modes to the branching ratios of B s(d) → µ + µ − in the framework of non-minimal Universal Extra Dimensional, at one loop level. The results have been compared to the experimental data to constrain the parameters of this model. From the measured decay branching ratio of B s → µ + µ − (depending on the values of boundary localised parameters) lower limit on R −1 can be as high as 800 GeV. We have briefly reviewed the bounds on nmUED parameter space coming from electroweak precision observables. The present analysis (B s → µ + µ − ) has ruled out new regions of parameter space in comparison to the analysis of electroweak data. We have revisited the bound on R −1 in Universal Extra Dimensional model, which came out to be 454 GeV. This limit on R −1 in Universal Extra Dimensional framework is not as competitive as the limits derived from the consideration of relic density or Standard Model Higgs boson production and decay to W + W − . Unfortunately, B d → µ + µ − decay branching ratio would not set any significant limit on R −1 in a minimal or non-minimal Universal Extra Dimensional model.

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“…However, in general one can adopt asymmetric boundary terms leading to non-conservation of KK-parity. Phenomenology of such KK-parity-non-conserving scenario can be found in [14,21].…”

Section: A Lightning Review Of Kk-parity-conserving Nmued Scenariomentioning

confidence: 99%

“…In 5-dimensions four component Dirac spinors Ψ L (x, y) and Ψ R (x, y) can be written in terms of two component spinors [12,14]:…”

Section: A Lightning Review Of Kk-parity-conserving Nmued Scenariomentioning

confidence: 99%

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Nonminimal universal extra dimensional model confrontsBs→μ+μ−

2016

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“…In a non-minimal version of five-dimensional UED theory, we put boundary-localised kinetic terms (BLKTs) [44,[49][50][51][52][53][54] at the orbifold fixed points (y = 0 and y = π R). L ,R are the free fermion fields, the zero-modes of which are the chiral projections of the SM fermions.…”

Section: Kk-parity-non-conserving Ued In a Nutshellmentioning

confidence: 99%

“…Hence the single production of n = 1 KK-states and its subsequent decay into n = 0 states would be possible via this non-conservation of KK-parity. We will utilise this KK-parity-non-conserving coupling of the B 1 (W 1 3 ) to a pair of SM fermions (n = 0 states) [44] 3 ) of the model. In Ref.…”

Section: Introductionmentioning

confidence: 99%

KK-parity non-conservation in UED confronts LHC data

Shaw

2015

Eur. Phys. J. C

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Kaluza-Klein (KK) parity can be violated in a five-dimensional universal extra-dimensional model with boundary-localised (kinetic or mass) terms (BLTs) at the fixed points of S 1 /Z 2 orbifold. In this framework we study the resonant production of Kaluza-Klein excitations of the neutral electroweak gauge bosons at the LHC and their decay into an electron-positron pair or a muon-antimuon pair. We use the results (for the first time, to our knowledge) given by the LHC experiment to constrain the mass range of the first KK-excitation of the electroweak gauge bosons (B 1 and W 1 3 ). It is interesting to note that the LHC result puts an upper limit on the masses of the n = 1 KK-leptons for positive values of the BLT parameters depending upon the mass of the + − resonance.

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Non-minimal Universal Extra Dimensions with Brane Local Terms: the top quark sector

Datta

Nishiwaki

Niyogi

2014

J. High Energ. Phys.

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Abstract:We study the physics of Kaluza-Klein (KK) top quarks in the framework of a non-minimal Universal Extra Dimension (nmUED) with an orbifolded (S 1 /Z 2 ) flat extra spatial dimension in the presence of brane-localized terms (BLTs). In general, BLTs affect the masses and the couplings of the KK excitations in a non-trivial way including those for the KK top quarks. On top of that, BLTs also influence the mixing of the top quark chiral states at each KK level and trigger mixings among excitations from different levels with identical KK parity (even or odd). The latter phenomenon of mixing of KK levels is not present in the popular UED scenario known as the minimal UED (mUED) at the tree level. Of particular interest are the mixings among the KK top quarks from level '0' and level '2' (driven by the mass of the Standard Model (SM) top quark). These open up new production modes in the form of single production of a KK top quark and the possibility of its direct decays to SM particles leading to rather characteristic signals at the colliders. Experimental constraints and the restrictions they impose on the nmUED parameter space are discussed. The scenario is implemented in MadGraph 5 by including the quark, lepton, the gauge-boson and the Higgs sectors up to the second KK level. A few benchmark scenarios are chosen for preliminary studies of the decay patterns of the KK top quarks and their production rates at the LHC in various different modes. Recast of existing experimental analyzes in scenarios having similar states is found to be not so straightforward for the KK top quarks of the nmUED scenario under consideration.

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Universal extra-dimensional models with boundary localized kinetic terms: Probing at the LHC

Cited by 31 publications

References 49 publications

Nonminimal universal extra dimensional model confrontsBs→μ+μ−

Nonminimal universal extra dimensional model confrontsBs→μ+μ−

KK-parity non-conservation in UED confronts LHC data

Non-minimal Universal Extra Dimensions with Brane Local Terms: the top quark sector

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