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" ... When two protons meet each other in the Sun, their wavefunctions overlap, allowing the temporary ... [+] creation of helium-2: a diproton. Almost always, it simply splits back into two protons, but on very rare occasions, a stable deuteron (hydrogen-2) is produced, due to both quantum tunneling and the weak interaction. ... "
" ... When two protons meet each other in the Sun, their wavefunctions overlap, allowing the temporary... [+] creation of helium-2: a diproton. Almost always, it simply splits back into two protons, but on very rare occasions, a stable deuteron (hydrogen-2) is produced, due to both quantum tunneling and the weak interaction. These branching ratios, and hence the rate of deuterium production, may not be identical for the antimatter counterpart of this system. ... "