Mainz 2014 – scientific programme

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T: Fachverband Teilchenphysik

T 104: Jenseits des Standardmodells (Theorie) 3

T 104.2: Talk

Thursday, March 27, 2014, 17:00–17:15, P6

Higgs Decay into two Photons at the Boundary of a Warped Extra Dimension — •Juliane Hahn, Clara Hörner, Raoul Malm, Matthias Neubert, Kristiane Novotny, and Christoph Schmell — PRISMA Cluster of Excellence & Mainz Institute for Theoretical Physics, Johannes Gutenberg Universität, 55099 Mainz, Germany

Recently the discovery of the Higgs boson at 125-126 GeV confirmed the existance of the gauge hierarchy problem. Extradimensional models like the 5D Randall-Sundrum model, in which the Standard model is embedded in a slice of anti-de Sitter space while the Higgs field is localized on or close to the boundary of the extra dimension, provide a solution to this problem. In this context a five dimensional calculation of the loop induced Higgs decay to two photons in different setups of the RS model is presented, where the gauge invariance of the amplitude in R_ξ-gauge is discussed. Furthermore an exact expression for the amplitude in terms of the 5D W-boson propagator, including the propagation of heavy Kaluza Klein particles in the loop, is obtained.