antiproton

In the conventional scenario sketched above, antiprotons are produced in the galactic environment by spallation of heavy nuclei and protons onto interstellar gas.

With our work we are taking the second route, and we hope in the future to do similar experiments with antiprotons using the same technique.

28), annihilating each other and in the process producing gamma rays and energetic particles, such as positrons and antiprotons (the antimatter equivalents of electrons and protons, respectively).

Tightly bunched antiprotons stick together, just like their proton cousins.

that of couples of all virtual particles possibly generated together with energetic protons and antiprotons; this is possible because [M.sub.u][c.sup.2] involves the visible mass energy [m.sub.u][c.sup.2] plus the contribution of [m.sub.?][c.sup.2].

The experiment captures antiprotons and combines them with antielectrons (positrons) to make antihydrogen atoms, which are stored and studied for a few seconds in a magnetic trap.

US scientists have collided protons with antiprotons to discover how matter gathered mass after the Big Bang, 13 million years ago.

In that perhaps-opaque phrase, "cooling" refers to imposing order on a swarm of unruly particles antiprotons required for the experiment.

This works well for charged particles like antiprotons and positrons.