The new data point to a WIMP with a mass in the range of 7-11 billion electronvolts
At first the plan was just to upgrade BESSY I from 800 million electronvolts
(MeV) to 1 billion electronvolts
(GeV), but now SESAME will be an even bigger machine.
2 billion electronvolts
, about six times that of a proton and very close to theorists' predictions.
If the Higgs particle has a mass at the high end of its predicted range, about 115 billion to 200 billion electronvolts
, it should be easily detected, its decay products standing out dramatically against the background of particle debris from other processes.
Her team found that the X rays peaked at an energy of 10,000 electronvolts
One study focuses on lower-energy cosmic rays that originate within our galaxy and have energies up to 1,000 trillion electronvolts
So-called killer electrons, which are charged particles revved up to energies greater than 1 million electronvolts
, punch through the skin of spacecraft.
The energy gain was puny, compared to that produced by conventional accelerators, which routinely boost particles to billions and trillions of electronvolts
Theorists have shown that collisions with background-radiation photons would sap the cosmic rays' energies, limiting them to about 50 million trillion electronvolts
(eV) on arrival at terrestrial detectors.
The ions--a searing beam of 30 trillion protons, with energies up to 50 million electronvolts
(MeV)--burst from the far side of the target.
148), researchers now report that they've pinned down the origin of the background at energies where it had remained most elusive--above 2,000 electronvolts
While orbiting Earth, AXAF will produce ultrasharp images and high-resolution spectroscopy at low X-ray energies, ranging from 100 to 10,000 electronvolts