In particle physics, “annihilation” is a transformation.
gamma ray
From Physics World, March 24, 2020: Scientists using the first year of data from the Dark Energy Survey, which is led by Fermilab, establish that there is a correlation between the positions of gravitational lenses — deduced from the stretching of distant galaxies — and gamma-ray photons. A data comparison from gravitational lensing and gamma-ray observations reveals that regions of the sky with greater concentrations of matter emit more gamma rays.
From SLAC, Jan. 13, 2020: Matching up maps of matter and light from the Dark Energy Survey, hosted at Fermilab, and Fermi Gamma-ray Space Telescope may help astrophysicists understand what causes a faint cosmic gamma-ray glow.
From Gizmodo, Dec. 13, 2019: Fermilab scientist Dan Hooper is quoted in this article on a new paper that says dark matter could be responsible for the mysterious observation of gamma rays in the center of our galaxy.
The Cherenkov Telescope Array will combine experimental and observatory-style approaches to investigate the universe’s highest energies.
The era of multi-messenger astronomy promises rich rewards—and a steep learning curve.
Construction has begun for the CTA, a discovery machine that will study the highest-energy objects and events across the entire sky.
From lightning to the death of electrons, the highest-energy form of light is everywhere.
Combining the newest of astronomical instruments with the most venerable techniques of patient attention to detail, scientists at the Department of Energy’s Fermi National Accelerator Laboratory, the University of Chicago and other institutions believe they have made the first optical observation of a gamma ray burst afterglow unprompted by prior observation of the gamma ray burst itself-a so-called “orphan afterglow.”