Bounds on the Simplest Little Higgs Model Mass Spectrum Through Z Leptonic Decay

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dc.creatorDias, Alex G.
dc.creatorPires, C. A. de S.
dc.creatorda Silva, P. S. Rodrigues
dc.date2007-11-07
dc.date2008-02-19
dc.date.accessioned2026-07-07T11:54:04Z
dc.date.available2026-07-07T11:54:04Z
dc.descriptionWe derive the leptonic neutral current in the simplest little Higgs model and compute the contribution of the model to the decay width $Z \to e^+e^-$. Using the precision electroweak data we obtain a strong lower bound $f\geq 5.6$ TeV at 95% C.L. on the characteristic energy scale of the model. It results in a lower bound for the new gauge bosons $W^{\prime\pm}$ and $Z^{\prime}$ as being $M_{W^{\prime\pm}}\geq 2.6$ TeV and $M_{Z^{\prime}}\geq 3.1$ TeV, respectively. We also present the allowed values of the $k=f_1/f_2$ which is the parameter relating the two vacuum expectation values of the scalar triplets in the model, and the $μ$ parameter of a quadratic term, involving the triplets, necessary to provide an acceptable mass range for the standard Higgs boson.
dc.descriptionNew references added, 13 pages. Version to be published
dc.identifierhttps://arxiv.org/abs/0711.1154
dc.identifierhttp://arxiv.org/abs/0711.1154
dc.identifierPhys.Rev.D77:055001,2008
dc.identifierdoi:10.1103/PhysRevD.77.055001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/204763
dc.subjectHigh Energy Physics - Phenomenology
dc.titleBounds on the Simplest Little Higgs Model Mass Spectrum Through Z Leptonic Decay
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