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HK: Physik der Hadronen und Kerne
HK 10: Postersitzung: Theorie
HK 10.14: Poster
Dienstag, 20. März 2001, 10:30–12:45, R
QCD Sum Rules for medium modifications of D+ and D− in dense matter — •Philippe Morath and Wolfram Weise — Physik-Department, Technische Universität München, Garching
We study D+ and D− mesons in dense matter using QCD sum rules:
Apart from a general mass shift, we expect a mass splitting between D+
and D−. For this purpose, we derive new QCD sum rules for each the
mass
shift and the splitting between the mesons. The phenomenological side is
modelled by the Born terms coming from the scattering process D+N→
Bc→ D+N, where N stands for neutron or proton and Bc is a
charmed baryon. We also take the new possible decays D+N→ Bcπ
into
account.
We analyze the sum rules in this framework and discuss possible
implications
to bound states between D mesons and heavy nuclei and consequences
for the Charmonium spectrum.
(gefördert durch BMBF und GSI)