Proton decay

Proton decay is a theory that a proton could decay into two small particles, a pion and a positron. This would be a new type of radioactive decay. So far, proton decay has not been observed, but some physicists believe it. Most current theories say that protons do not decay.

Proton Decay Media

• Proton decay.svg

  The pattern of weak isospins, weak hypercharges, and color charges for particles in the Georgi–Glashow model. Here, a proton, consisting of two up quarks and a down, decays into a pion, consisting of an up and anti-up, and a positron, via an X boson with electric charge −4/3e.

• R-parity violating decay.svg

  R-parity violating rapid proton decay in MSSM

• Proton decay2.svg

  Dimension-6 proton decay mediated by the X boson (3,2)
  −⁵⁄₆ in SU(5) GUT

• Proton decay3.svg

  Dimension-6 proton decay mediated by theX boson (3,2)
  ¹⁄₆ in flipped SU(5) GUT

• Proton decay4.svg

  Dimension-6 proton decay mediated by thetriplet Higgs T (3,1)
  −¹⁄₃ and theanti-triplet Higgs T (3,1)
  ¹⁄₃ in SU(5) GUT