2008/09/30 by T. Hilger, R. Thomas, B. Kampfer · 1 citation
Physics and Astronomy · #nucl-th
paper · pdf · doi:10.1103/physrevc.79.025202
published as Phys. Rev. C 79, 025202 (2009) [7 pages] · 16 pages, 8 figures, to be published; a broader range of condensate values is discussed (v2)
arxiv created 2008/10/29 · arxiv updated 2009/12/01
QCD sum rules for D and B mesons embedded in cold nuclear matter are evaluated. We quantify the mass splitting of D - D-bar and B - B-bar mesons as a function of the nuclear matter density; extrapolated to saturation density it is in the order of 60 and 130 MeV driven essentially by the condensates <q-adjoint q>, <q-adjoint g sigma G q> and <q-bar q>. The genuine chiral condensate <q-bar q>, amplified by heavy-quark masses, enters the Borel transformed sum rules for the mass splitting beyond linear density dependence. Including strange quark condensates reveals a umerically smaller and opposite effect for the Ds - Ds-bar mass splitting.