Nuclear Fusion Detected That Violates Charge Symmetry -- AMIGA Astronomy

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Subject: Nuclear Fusion Detected That Violates Charge Symmetry

Author:
blobrana

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Date Posted: 22:13:51 04/07/03 Mon

Scientists at the Indiana University Cyclotron Facility in Bloomington have detected a rare process, the fusion of two nuclei of heavy hydrogen to form a nucleus of helium and an uncharged pion

The pion is one of the subatomic particles responsible for the strong force that holds every nucleus together.
An effect of this charge symmetry violation is that the neutron is slightly heavier than its charged partner, the proton. As a result, isolated neutrons decay, in about 10 minutes, into protons.

Theorists have proposed that the violation originates with quarks, and the fact that quarks carry small electrical charges, (and how much comes from the difference in mass between the two types of quarks found inside neutrons and protons).

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