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6 papers · 1 filter
Wilson coefficients and four-quark condensates in QCD sum rules for medium modifications of mesons
Thomas Buchheim, Thomas Hilger, Burkhard Kampfer
Wilson coefficients of light four-quark condensates in QCD sum rules are evaluated for pseudo-scalar mesons, thus, pushing the sum rules toward mass dimension six. Contrary to…
Heavy-quark expansion for D and B mesons in nuclear matter
Thomas Buchheim, Thomas Hilger, Burkhard Kampfer
The planned experiments at FAIR enable the study of medium modifications of and mesons in (dense) nuclear matter. Evaluating QCD sum rules as a theoretical prerequisite for…
Semileptonic meson decays in point-form relativistic quantum mechanics: unambiguous extraction of weak form factors
Maria Gomez-Rocha
The point-form version of the Bakamjian-Thomas construction is applied to the description of several semileptonic decays of mesons. Weak form factors are extracted without ambiguit…
Defining medium-specific condensates in QCD sum rules for and mesons
T. Buchheim, T. Hilger, B. Kampfer
QCD sum rules for and mesons in a strongly interacting environment require the decomposition of Gibbs averaged operators related to tensor structures. We present a procedur…
Spectra of heavy quarkonia in a Bethe-Salpeter-equation approach
Thomas Hilger, Carina Popovici, Maria Gomez-Rocha +1
In a covariant Bethe-Salpeter-equation approach and with a rainbow-ladder truncated model of QCD, we investigate the use of an effective interaction with the goal of reproducing QC…
A Dyson-Schwinger study of the four-gluon vertex
Anton K. Cyrol, Markus Q. Huber, Lorenz von Smekal
We present a self-consistent calculation of the four-gluon vertex of Landau gauge Yang--Mills theory from a truncated Dyson--Schwinger equation. The equation contains the leading d…