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Large extra dimension effects in Higgs boson production at linear colliders and Higgs factories

Anindya Datta, Emidio Gabrielli, Barbara Mele

hep-pharXiv:hep-ph/0303259

Abstract

In the framework of quantum gravity propagating in large extra dimensions, the effects of virtual Kaluza-Klein graviton and graviscalar interference with Higgs boson production amplitudes are computed at linear colliders and Higgs factories. The interference of the almost-continuous spectrum of the KK gravitons with the standard model resonant amplitude is finite and predictable in terms of the fundamental D-dimensional Plank scale MD and the number of extra dimensions δ. We find that, for MD ~ 1 TeV and δ=2, effects of the order of a few percent could be detected for heavy Higgs bosons (mH>500 GeV) in Higgs production both via WW fusion in e+e- colliders and at μ+μ- Higgs-boson factories.

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