Title
Stueckelberg Z ' extension with kinetic mixing and millicharged dark matter from the hidden sector
Abstract
An analysis is given of the Stueckelberg extension of the standard model with a hidden sector gauge group U(1)X where the mass growth for the extra gauge boson occurs via the Stueckelberg mechanism, and where the kinetic mixing in the U(1)X×U(1)Y sector is included. Such a kinetic mixing is generic in a broad class of supergravity and string models. We carry out a detailed global fit of the model with the precision CERN LEP data on and off the Z pole, with χ2 within 1% of the χ2 of the standard model fit. Further, it is shown that, in the absence of matter in the hidden sector, there is a single effective parameter that controls the deviations from the standard model predictions, and the dependence on the kinetic mixing emerges only when matter in the hidden sector is included. An analysis is also given of millicharged dark matter arising from the hidden sector, where it is shown that such dark matter from the Stueckelberg extension can satisfy WMAP-3 data while allowing for a sharp Z′ resonance which can be detected at the Tevatron and at the CERN LHC via a dilepton signal generated by the Drell-Yan process.
Keywords
Stueckelberg extension, kinetic mixing, hidden sector gauge group U(1)X, Stueckelberg mechanism
Subject Categories
Dark matter (Astronomy), Bosons
Disciplines
Physics
Publisher
American Physical Society
Publication Date
6-1-2007
Rights Information
Copyright (2007) American Physical Society
Rights Holder
American Physical Society
Recommended Citation
Feldman, Daniel; Liu, Zuowei; and Nath, Pran, "Stueckelberg Z ' extension with kinetic mixing and millicharged dark matter from the hidden sector" (2007). Physics Faculty Publications. Paper 494.
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Notes
Originally published in Physical Review D v.75 (2007): 115001. DOI: 10.1103/PhysRevD.75.115001