Vibrational spectroscopy of H2+: precise evaluation of the Zeeman effect
  We present an accurate computation of the g-factors of the hyperfine states of the hydrogen molecular ion H2+. The results are in good agreement with previous experiments, and can be tested further by rf spectroscopy. Their implication for high-precision two-photon vibrational spectroscopy of H2+ is also discussed. It is found that the most intense hyperfine components of two-photon lines benefit from a very small Zeeman splitting. 
Jean-Philippe Karr (LKB - Jussieu, DPM), Vladimir Korobov (BLTP),   Laurent Hilico (LKB - Jussieu, DPM)