Dark matter and a new gauge boson through kinetic mixing

Details Dark matter and a new gauge boson through kinetic mixing Dark matter and a new gauge boson through kinetic mixing

2010-11-15

arxiv.org/abs/1011.3300v2

JHEP 1102:100,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 9 figures, references added

Scientific paper

10.1007/JHEP02(2011)100

We consider a hidden sector model of dark matter which is charged under a hidden U(1)_X gauge symmetry. Kinetic mixing of U(1)_X with the Standard Model hypercharge U(1)_Y is allowed to provide communication between the hidden sector and the Standard Model sector. We present various limits on the kinetic mixing parameter and the hidden gauge coupling constant coming from various low energy observables, electroweak precision tests, and the right thermal relic density of the dark matter. Saturating these constraints, we show that the spin-independent elastic cross section of the dark matter off nucleons is mostly below the current experimental limits, but within the future sensitivity. Finally, we analyze the prospect of observing the hidden gauge boson through its dimuon decay channel at hadron colliders.

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