Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-10-26
Phys.Rev.D75:083519,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
13 pages, 3 figures
Scientific paper
10.1103/PhysRevD.75.083519
Little Higgs models with T parity contain an attractive dark matter candidate, the heavy photon. We compute the cross section of the heavy photon annihilation into Z-photon pairs, which turns out to be substantially higher than the previously computed cross section for the two photon final state. Unfortunately, even with this enhancement, the monochromatic photon flux from galactic heavy photon annihilation is unlikely to be detectable by GLAST or the currently operating atmospheric Cerenkov telescopes. We also compute the flux of high-energy neutrinos from the annihilation of the heavy photons captured by the Sun and the Earth. The maximum flux of upward-going muons due to such neutrinos is about 1 yr^{-1}km^{-2}.
Perelstein Maxim
Spray Andrew
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