Possible Clues:

• Process that may transform a neutron into a proton
• *Process by which a neutron might become a proton
• *Process that creates an antineutrino, or what the starred answers' starts represent?
• Process that occurs in an unstable nucleus with too many protons or neutrons
• Process by which an electron is emitted
• Process that can involve positron emission
• Process by which neutrinos are produced
• New debate about unknown particle emission