Investigation of EAS muon pseudorapidity in KASCADE-Grande

The Muon Tracking Detector in KASCADE-Grande experiment allows measurement of muon directions up to 700m from the shower centre. It means, that nearly all muons produced in a shower and surviving to the ground level are subject of investigation. This is not only important for the investigation of the muon production height but also for a study of EAS muon pseudorapidity distributions which in this case are nearly identical to the pseudorapidity distributions of their parent mesons produced in hadronic interactions. Experimental data on lateral distribution of mean muon pseudorapidity and its dependence on the primary energy will be presented and compared to predictions from the Monte Carlo CORSIKA simulations. (orig.)