But no matter how fast these electrons spiral, they can't radiate away the 73 billion and 95 billion electron volts
the two photons carried.
The Cornell Electron Storage Ring (CESR) uses superconducting cavities routinely to collide electron with anti-electron (positron) beams, each carrying a punch of 5 billion electron volt
One exception is a small bump, an excess of activity at a particular energy, that could indicate the existence of a particle with a mass of roughly 750 billion electron volts
, or 750 GeV.
Fermi's Large Area Telescope (LAT) recorded one gamma ray with an energy of at least 94 billion electron volts
(GeV), or some 35 billion times the energy of visible light, and about three times greater than the LAT's previous record.
The particle itself weighs approximately 126 billion electron volts
(a proton weighs 1 billion electron volts
), and that mass would be what's needed to make the universe unstable, notes LiveScience.
In Fermi's all-sky maps of very-high-energy gamma radiation (1 billion to 100 billion electron volts
per photon), the bubbles at first went unrecognized.
UPDATE: The galaxy is teeming with cosmic rays--and we now know a lot more about these subatomic particles that tear through space with tremendous energy, up to roughly 100 billion billion electron volts
. The lowest-energy cosmic rays come from the sun.
This excess appears most prominent at energies between 1 and 3 billion electron volts
(GeV) -- roughly a billion times greater than that of visible light -- and extends outward at least 5,000 light-years from the galactic center.
Ajello and his team investigated the EBL by studying gamma rays from 150 blazars, or galaxies powered by black holes, that were strongly detected at energies greater than 3 billion electron volts
(GeV), or more than a billion times the energy of visible light.
The electrons had energies roughly between 300 and 700 billion electron volts
(eV), meaning these subatomic particles have almost as much kinetic energy as a flying mosquito.
For one, the mass of the Higgs boson, about 125.09 billion electron volts
, seems precariously low if the census of particles is truly complete.
The team examined two years of LAT-detected gamma rays with energies in the range from 200 million to 100 billion electron volts
(GeV) from 10 of the roughly two dozen dwarf galaxies known to orbit the Milky Way.