Bonn 2010 – scientific programme

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T: Fachverband Teilchenphysik

T 20: Beyond the Standard Model (Theorie) IV

T 20.4: Talk

Thursday, March 18, 2010, 17:30–17:45, HG XIV

Unitarity of Higgs Scattering in Extra Dimensional Models within Fixed Point Gravity — •Jan Brinkmann¹, Gudrun Hiller¹, and Daniel Litim² — ¹Fakultät für Physik, Technische Universität Dortmund, D-44221, Germany — ²Department of Physics and Astronomy, University of Sussex, Brighton, BN1 9QH, United Kingdom

We use perturbative unitarity to determine crossover bounds on asymptotically safe gravitation. The latter approach to quantum gravity suggests a gravitational ultra-violet fixed point and, hence, avoids the well known problem of non-renormalizability. We work in an extra dimensional context, which brings along a solution to the hierarchy problem between the Planck Mass and the weak scale, and breaks down the fundamental scale of gravity to the TeV region. Our study shows that unitarity holds well above the fundamental Planck scale.