2014/08/31 by Paul R. Archer, Marcela Carena, Adrian Carmona +1 · 1 citation
Physics and Astronomy · #Context (archaeology) #Electroweak interaction #Electroweak scale #Extra dimensions #Gauge boson #Higgs boson #Higgs field #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #Scalar (mathematics) #Standard Model (mathematical formulation) #hep-ph
paper · pdf · doi:10.1007/jhep01(2015)060
published as JHEP 1501:060,2015 · 56 pages, 13 figures; v2; references added; matches published version in JHEP
openalex publication_date 2015/01/01 · arxiv created 2015/01/15 · arxiv updated 2015/01/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Warped extra-dimension models in which the Higgs boson is allowed to propagate in the bulk of a compact AdS5 space are conjectured to be dual to models featuring a partially composite Higgs boson. They offer a framework with which to investigate the implications of changing the scaling dimension of the Higgs operator, which can be used to reduce the constraints from electroweak precision data. In the context of such models, we calculate the cross section for Higgs production in gluon fusion and the H → γγ decay rate and show that they are finite (at one-loop order) as a consequence of gauge invariance. The extended scalar sector comprising the Kaluza-Klein excitations of the Standard Model scalars is constructed in detail. The largest effects are due to virtual KK fermions, whose contributions to the cross section and decay rate introduce a quadratic sensitivity to the maximum allowed value y ∗ of the random complex entries of the 5D anarchic Yukawa matrices. We find an enhancement of the gluon-fusion cross section and a reduction of the H →γγ rate as well as of the tree-level Higgs couplings to fermions and electroweak gauge bosons. We perform a detailed study of the correlated signal strengths for different production mechanisms and decay channels as functions of y ∗, the mass scale of Kaluza-Klein resonances and the scaling dimension of the composite Higgs operator.