2006/08/31 by W. L. Chang, We-Fu Chang, John N. Ng +1 · 5 citations
Physics and Astronomy · #Electroweak interaction #Gauge (firearms) #Gauge boson #Gauge theory #Higgs boson #High-Energy Particle Collisions Research #Large Hadron Collider #Mixing (physics) #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Shadow (psychology) #Standard Model (mathematical formulation) #hep-ph
paper · pdf · doi:10.1103/physrevd.74.095005
published as Phys.Rev.D74:095005,2006; Erratum-ibid.D79:039902,2009 · 10 pages, 7 figures. Note and refs. added
arxiv created 2006/10/25 · openalex publication_date 2006/11/14 · arxiv updated 2014/11/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We consider the phenomenological consequences of a hidden Higgs sector extending the standard model (SM), in which the ``shadow Higgs'' are uncharged under the SM gauge groups. We consider a simple U(1) model with one Higgs singlet. One mechanism which sheds light on the shadow sector is the mixing between the neutral gauge boson of the SM and the additional U(1) gauge group. The mixing happens through the usual mass mixing and also kinetic mixing, and is the only way the ``shadow Z'' couples to the SM. We study in detail modifications that the presence of such shadow sector would bring to the electroweak precision tests, which in turn provide constraints on the kinetic-mixing parameter, sϵ, left free in our model. The shadow Z production rate at the CERN LHC and the International Linear Collider depends on sϵ. We find that the observable event rate at both facilities is possible for a reasonable range of sϵ allowed by electroweak precision tests.