QCD sum rules for D and B mesons in nuclear matter
Nuclear Theory
2009-09-29 v2
Abstract
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.
Keywords
Cite
@article{arxiv.0809.4996,
title = {QCD sum rules for D and B mesons in nuclear matter},
author = {T. Hilger and R. Thomas and B. Kampfer},
journal= {arXiv preprint arXiv:0809.4996},
year = {2009}
}
Comments
16 pages, 8 figures, to be published; a broader range of condensate values is discussed (v2)