In the proton-proton cycle, the positron is:

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A positron is an anti-electron, with the same mass as an electron but with opposite charge. In the proton-proton cycle, a proton converts into a neutron by emitting a positron and a neutrino. A positron is an antimatter counterpart of an electron, with the same mass but opposite charge. In the proton-proton cycle, a proton transforms into a neutron, a positron, and a neutrino. So, the positron is an anti-electron.

In the Proton-Proton Cycle, the Positron Is