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Rare Decay Z→ν(average) νγγ via Tensor Unparticle Mediation

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The decay width of the rare decay Z→ν(average) νγγ is strictly constrained from the LEP data. Tensor unparticles provide a tree-level contribution to this rare decay. We have calculated the tensor unparticle contribution to the rare decay Z→ν(average) νγγ. The current experimental limit has been used to constrain the unparticle couplings ν(average) νZU(superscript μν) and γγU(superscript μν).

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