The Regge spectrum (GeV) for J^PC=1^{- -}

M = m_Q + m_Q + w ( 2n + l + 3/2 )

m_n = 0.406, m_s = 0.508, m_c = 1.562
and w = 0.19 Phys.Rev. D27, 1527 (1983)

    ground
state
S 1^st
  excitation
S + D 2^nd
  excitation
S + D 3^rd
  excitation
S + D 4^th
  excitation
S + D

1.097 (nn) 1.477 1.857 2.237 2.617

1.301 (ss) 1.681 2.061 2.441 2.821

3.409 (cc) 3.789 4.169 4.549 4.929