Bounding the electromagnetic and weak dipole moments of the tau-lepton in a simplest little Higgs model

Details Bounding the electromagnetic and weak dipole moments of the tau-lepton in a simplest little Higgs model Bounding the electromagnetic and weak dipole moments of the tau-lepton in a simplest little Higgs model

2009-10-22

arxiv.org/abs/0910.4217v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 5 figures

Scientific paper

From the total cross section for the reaction $e^+e^-\to \tau^+\tau^-\gamma$ at the $Z_1$ pole and in the framework of a simplest little Higgs model (SLHM), we get a limit on the characteristic energy scale of the model $f$, $f \geq 5.4$ $TeV$, which in turn induces bounds on the electromagnetic and weak dipole moments of the tau-lepton. Our bounds on the electromagnetic moments are consistent with the bounds obtained by the L3 and OPAL collaborations for the reaction $e^+e^-\to \tau^+\tau^-\gamma$. We also obtained bounds on the tau weak dipole moments which are consistent with the bounds obtained recently by the DELPHI and ALEPH collaborations from the reaction $e^+e^-\to \tau^+\tau^-$.

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