Abstract
The Heavy Photon Search experiment (HPS) at Jefferson Laboratory will search for a new U(1) massive gauge boson, or "heavy-photon", mediator of a new fundamental interaction, called "dark-force", that couples to ordinary photons through kinetic mixing. HPS has sensitivity in the mass range 20 MeV – 1 GeV and coupling ϵ2 between 10−5 and 10−10. The HPS experiment will look for the e+e− decay of the heavy photon, by resonance search and detached vertexing, in an electron beam fixed target experiment. HPS will use a compact forward spectrometer, which employs silicon microstrip detectors for vertexing and tracking, and a PbWO4 electromagnetic calorimeter for energy measurement and fast triggering.
Highlights
The “heavy-photon”, or A, is an hypothetical massive gauge boson associated to an additional U (1) hidden symmetry, as predicted by several “Beyond the Standard Model” (BSM) theories [1, 2]
Results from indirect and direct dark matter searches have been re-interpreted as potential signals of dark matter interacting with heavy photons
The positron excess in the cosmic-ray flux recently reported by AMS [10], confirming previous results from PAMELA [11] and FERMI [12], can be explained assuming that dark matter is charged under the “dark-force” interaction, and decays or annihilates to A particles, that in turn decay to e+e− pairs
Summary
This content has been downloaded from IOPscience. Please scroll down to see the full text. Ser. 556 012064 (http://iopscience.iop.org/1742-6596/556/1/012064) View the table of contents for this issue, or go to the journal homepage for more. Download details: IP Address: 129.57.64.159 This content was downloaded on 15/08/2016 at 20:05 Please note that terms and conditions apply
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