(However, it is possible if the system interacts with another particle or field for annihilation to produce one photon, as when a positron annihilates with a bound atomic electron, it is possible for only one photon to be emitted, as the nuclear Coulomb field breaks translational symmetry).
They were annihilated with 19.3 overs remaining.
But for an iconic, much-loved wild mammal to be annihilated, with the justification being to eke out a few more months of "production", is anathema to me.
The Giants were not merely defeated in the Super Bowl; they were annihilated with a suffocating completeness that -- rightly or not -- raised questions about everything positive that happened in the weeks before the game.
This is known because, as the universe aged and expanded, the radiation temperature would have dropped and each antiproton and each antineutron would have annihilated with a proton and a neutron to yield two gamma rays; and later each antielectron would have done the same with an electron to give two more gamma rays.
In effect he said to his readers, "You may hold, if you will, that objects of sense have only an 'in-and-out' existence, that they are created and annihilated with every turn of man's attention; but do not father those views on me.
"The atom drifts to where it wants to go," said Dr. Landua, namely the wall where its components will annihilate with their opposite numbers in a characteristic pattern: the antiproton into a spray of lighter particles called pions, and the positron producing a flash of gamma rays.
The stock market had been annihilated, with the Dow dropping from a peak near 1,000 to under 600.
When a positron is implanted into condensed matter, it annihilates with an electron and emits two 511 keV γ-rays.
