Heavy-quark expansion for D and B mesons in nuclear matter

The planned experiments at FAIR enable the study of medium modifications of $D$ and $B$ mesons in (dense) nuclear matter. Evaluating QCD sum rules as a theoretical prerequisite for such investigations encounters heavy-light four-quark condensates. We utilize an extended heavy-quark expansion to cope with the condensation of heavy quarks.
Comment: Contribution to the MESON2014 conference, Krak\'ow, Poland. To appear in the proceedings