2015/06/15 by Eder Izaguirre, Itay Yavin · 38 citations
Physics and Astronomy · #Boson #Dark Matter and Cosmic Phenomena #Geometry #Higgs boson #High-Energy Particle Collisions Research #Hypercharge #Large Hadron Collider #Massless particle #Parameter space #Particle physics #Particle physics theoretical and experimental studies #Phase space #Phenomenology (philosophy) #Physics #Physics beyond the Standard Model #Quantum mechanics #Standard Model (mathematical formulation) #Vector boson #hep-ph
paper · pdf · doi:10.1103/physrevd.92.035014
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 92(3) (American Physical Society) · 11 pages, 3 figures
arxiv created 2015/06/15 · openalex publication_date 2015/08/20 · arxiv updated 2015/08/26 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The kinetic mixing of the vector boson of hypercharge with the vector boson(s) associated with particle sectors beyond the standard model is one of the best motivated windows to new physics. The resulting phenomenology depends on whether the new vector boson is massive or massless. The phenomenology associated with the massive phase has received considerable attention in recent years with many theoretical explorations and new experimental efforts, while the massless phase is linked to the phenomenology of millicharged particles. In this paper we introduce the more general case where the kinetic mixing is with a vector boson that is a linear combination of both a massive and a massless state (as the hypercharge is in the standard model). We demonstrate that the general phase is only weakly constrained when the mass scale associated with it is above about 100 MeV. Finally, we show that a new dedicated experiment at the LHC, proposed recently in Haas et al. [Phys. Lett. B 746, 117 (2015)], can explore large parts of the parameter space in the mass range between 100 MeV and 100 GeV. In particular, it is uniquely sensitive to a new signature that only arises in the general phase.