Higgs Mechanism with Type-II Nambu-Goldstone Bosons at Finite Chemical Potential

Yusuke Hama, Tetsuo Hatsuda, Shun Uchino

When the spontaneous symmetry breaking occurs for systems without Lorentz covariance, there arises possible mismatch, $N_{\mathrm{NG}}<N_{\mathrm{BG}}$, between numbers of Nambu-Goldstone…