Collider constraints on interactions of dark energy with the Standard Model

Details Collider constraints on interactions of dark energy with the Standard Model Collider constraints on interactions of dark energy with the Standard Model

2009-04-20

arxiv.org/abs/0904.3002v2

JHEP 0909:128,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

39 pages, 8 figures, uses ioplatex.sty and feynmp. v2: Matches version accepted by JHEP; extended discussion of straight corre

Scientific paper

10.1088/1126-6708/2009/09/128

We study models in which a light scalar dark energy particle couples to the gauge fields of the electroweak force, the photon, Z and W bosons. Our analysis applies to a large class of interacting dark energy models, including those in which the dark energy mass can be adjusted to evade fifth-force bounds by the so-called chameleon mechanism. We conclude that--with the usual choice of Higgs sector--electroweak precision observables are screened from the indirect effects of dark energy, making such corrections effectively unobservable at present-day colliders, and limiting the dark energy discovery potential of any future International Linear Collider. We show that a similar screening effect applies to processes mediated by flavour-changing neutral currents, which can be traced to the Glashow-Iliopoulos-Maiani mechanism. However, Higgs boson production at the Large Hadron Collider via weak boson fusion may receive observable corrections.

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