Chiral Lagrangian and spectral sum rules for dense two-color QCD

Understand

We analytically study two-color QCD with an even number of flavors at high baryon density.

• This theory is free from the fermion sign problem.
• Chiral symmetry is broken spontaneously by the diquark condensate.
• Based on the symmetry breaking pattern we construct the low-energy effective Lagrangian for the Nambu-Goldstone bosons.