We present a short review of our results on the collectivity and the suppression pattern of charmed mesons in heavy-ion collisions based on the microscopic Hadron-String Dynamics (HSD) transport approach for different scenarios of charm interactions with the surrounding matter – the ‘comover’ dissociation by mesons with further recreation byD−D̄ channels and ‘pre-hadronic’ interaction scenarios....

∗Heisenberg-Fellow hadronic fluctuations (“resolved”). Direct and resolved interactions can be separated by measuring the fraction xγ of the photon’s momentum participating in the hard interaction for the two photons. In γγ interactions they are labelled xγ for the two photons. Ideally, the direct γγ events with two bare photons are expected to have xγ = 1 and x − γ = 1, whereas for double-reso...

The experiment KASCADE observes simultaneously the electron-photon, muon, and hadron components of high-energy extensive air showers (EAS). The analysis of EAS observables for an estimate of energy and mass of the primary particle invokes extensive Monte Carlo simulations of the EAS development for preparing reference patterns. The present studies utilize the air shower simulation code CORSIKA ...

We report on calculations of the hadronic coupling constants gρππ and gNNπ based on lattice QCD with four flavors of dynamical staggered fermions. By computing 2–point and 3–point Green's functions we have been able to determine these coupling constants ab initio from QCD; the results gρππ = 4.2 ± 1.8 and gNNπ = 14.8 ± 6 are compatible with the experimental values. Recent lattice QCD calculatio...