In-medium mass modifications of the D0 and B0 mesons from QCD sum rules

摘要

In this Brief Report we calculate the in-medium mass modifications of the scalar mesons D0 and B0 using the QCD sum rules. In calculations we observe that the D0N and B0N scattering lengths are about 1.1 and 4.1 fm, respectively, the mass shifts δMD0=69 MeV and δMB0=217 MeV, and the D0N and B0N interactions are repulsive. The positive mass shifts indicate that the decays of the higher charmonium states into the D0D̅ 0 pair are suppressed.