STAR Fireball and Antiparticles (IMAGE)

DOE/Lawrence Berkeley National Laboratory

STAR Fireball and Antiparticles

Caption

Roughly equal amounts of matter and antimatter are created in the collision of energetic gold nuclei inside STAR, but because the fireball expands and cools quickly, antimatter can survive longer than that created in the big bang. In this collision an ordinary helium-4 nucleus (background) is matched by a nucleus of antihelium-4 (foreground).

Credit

STAR Collaboration and Lawrence Berkeley National Laboratory

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