Realistic model for SU(5) grand unification

Understand

A grand unified model based on SU(5) and supersymmetry is presented.

• Pairs of superfields belonging to 15 and 15* representations are newly introduced, while gauge coupling unification is satisfied.
• Improper mass relations in the minimal model between charged leptons and d-type quarks are corrected.
• Neutrinos have non-vanishing masses, with large angles for generation mixings of the leptons being compatible with the small angles of the quarks.